KR20120121227A - Method for accessing storage media, data writing method, parameter adjusting method in storage device, and storage device, computer system and storage medium applying the same - Google Patents

Abstract

Disclosed are a method and apparatus for accessing a storage medium using a virtual address. A storage medium access method includes mapping a physical zone of a storage medium to a virtual zone and accessing the storage medium based on the virtual zone, wherein the virtual zone corresponds to a plurality of physical zones, or a single The mapping process may be performed to correspond to a part of the physical zone.

Description

Method for accessing storage media, data writing method, parameter adjusting method in storage device, and storage device, computer system and storage medium applying the same}

The present invention relates to a method and apparatus for accessing a storage medium, and more particularly, to a method and apparatus for accessing a storage medium using a virtual address.

A disk drive, which is one of the storage devices, contributes to the operation of a computer system by writing data to or reading data from a storage medium according to a command issued from a host device. Various write methods have been studied to improve the recording density of a disk drive. In addition, there is a need for a new access method for a storage medium suitable for the new write method for increasing the recording density.

An object of the present invention is to provide a storage medium access method for accessing a storage medium in one direction by using a virtual address.

Another object of the present invention is to provide a data write method for executing data write in one direction in a storage medium using a virtual address.

It is still another object of the present invention to provide a parameter adjusting method of a storage device for adjusting a parameter value for determining a size of a virtual zone or a virtual band for a storage medium on a network.

Another object of the present invention is to provide a storage device for accessing a storage medium by using a virtual zone or a virtual band for the storage medium.

It is still another object of the present invention to provide a computer system for adjusting the size of a virtual zone or virtual band for a storage medium.

It is still another object of the present invention to provide a storage medium having recorded thereon program code for performing a method of adjusting the size of a virtual zone or virtual band for a storage medium.

According to an aspect of an exemplary embodiment, a storage medium access method includes mapping a physical zone of a storage medium to a virtual zone, and accessing the storage medium based on the virtual zone. The virtual zone may be mapped to correspond to a plurality of physical zones or to correspond to a portion of a single physical zone.

According to an embodiment of the inventive concept, it is preferable that a plurality of virtual bands are allocated for each physical zone of the storage medium.

According to an embodiment of the inventive concept, the number of virtual bands allocated for each physical zone of the storage medium is greater than the number of logical bands classified based on logical block addresses allocated for each physical zone of the storage medium. It is desirable to set.

According to an embodiment of the inventive concept, the logical band may be classified into a set of logical block addresses in a first size unit.

According to an embodiment of the inventive concept, the logical band may be classified into a set of contiguous logical block addresses in a first size unit.

According to an embodiment of the inventive concept, the virtual band may be classified into a physical storage space of the storage medium in a second size unit.

According to an embodiment of the inventive concept, the storage medium may include a disk, and the virtual band may be classified into a set of second size units for tracks of the disk.

According to an embodiment of the inventive concept, the storage medium may include a disc, and the virtual band may be classified into a set of second size units for consecutive tracks of the disc.

According to an embodiment of the inventive concept, the accessing of the storage medium may include allocating a virtual band included in a virtual zone corresponding to the logical band to a logical band including a logical block address specified by a command. Determining a physical location of a storage medium to access based on the assigned virtual band, and accessing the determined physical location of the storage medium, wherein the logical band is a logical block address of a first size unit. And the virtual band is classified into physical storage space of the storage medium in a second size unit.

According to an embodiment of the inventive concept, the command preferably includes a write command.

According to an embodiment of the inventive concept, the allocating of the virtual band may include the case where the virtual band allocated to the logical band including the logical block address specified by the command does not exist. It is preferable to allocate a new virtual band that is not allocated to another logical band among the virtual bands included in the.

According to an embodiment of the inventive concept, the allocating of the virtual band may include a virtual address not allocated to a logical block address in a virtual band allocated to a logical band including a logical block address specified by the command. In the case of not remaining, it is preferable to allocate a new virtual band that is not allocated to another logical band among the virtual bands included in the virtual zone.

According to an embodiment of the inventive concept, the allocating of the virtual band may include assigning the virtual band to another logical band among the virtual bands included in the physical zone corresponding to the logical band including the logical block address specified by the command. If there is an unassigned virtual band, allocating a virtual band not allocated to the other logical band to a logical band including a logical block address specified in the command, and assigning a logical block address specified in the command If there is no virtual band allocated to another logical band among the virtual bands included in the physical zone corresponding to the including logical band, the virtual band not allocated to another logical band included in another physical zone of the virtual zone Non-band specifying band in command It is preferable to include the step of assigning a logical block address, the band containing the enemy.

According to an embodiment of the inventive concept, the determining of the physical location of the storage medium to be accessed may include allocating a virtual address corresponding to a logical block address designated by the command from the allocated virtual band; And converting the assigned virtual address into physical location information of the storage medium.

According to an embodiment of the inventive concept, when a virtual address corresponding to a logical block address designated by the command is previously allocated in the virtual band, it is preferable to invalidate the previously allocated virtual address. Do.

According to an embodiment of the inventive concept, the storage medium is converted into a virtual address by converting a logical block address designated by a command to sequentially write data in one direction in the storage medium based on the virtual zone. It is desirable to access.

According to an embodiment of the inventive concept, a structure in which a plurality of virtual bands are allocated for each physical zone of the storage medium, and sequentially in an inner circumferential direction or an outer circumferential direction in a physical area of a storage medium corresponding to the virtual band It is preferable to access the storage medium so that data can be written to.

According to an embodiment of the inventive concept, accessing the storage medium may include searching for a virtual address to be accessed using a mapping table based on a virtual band allocated to a logical band for each virtual zone, and And preferably accessing the location of the storage medium corresponding to the retrieved virtual address.

According to an embodiment of the inventive concept, the method may further include adjusting sizes of virtual bands that classify physical storage spaces of the storage medium included in the virtual zone.

According to another aspect of the inventive concept, a storage medium access method may include combining a plurality of physical zones of a storage medium into a single virtual zone or dividing a single physical zone into a plurality of virtual zones; Accessing the storage medium based on the virtual zone.

According to another aspect of the inventive concept, a method of accessing a storage medium may include mapping a physical storage space of the storage medium to a virtual band, and accessing the storage medium based on the virtual band. And the size of the physical storage space of the storage medium corresponding to each virtual band is adjusted according to an initially set command.

According to an embodiment of the inventive concept, the accessing of the storage medium may be performed based on a virtual band allocated to a logical band including a logical block address specified by a command. .

According to an embodiment of the inventive concept, one or more virtual bands may be allocated to a logical band including a logical block address designated by the command.

According to an embodiment of the inventive concept, the size of the virtual band is preferably adjusted to be larger or smaller than the size of the logical band.

According to an embodiment of the inventive concept, the size of the virtual band is preferably adjusted to be equal to the size of the logical band.

According to an embodiment of the inventive concept, the size of the virtual band may be adjusted for each physical zone of the storage medium according to an initially set command.

According to an embodiment of the inventive concept, the accessing of the storage medium may include allocating the virtual band to a logical band including a logical block address designated by a command, based on the allocated virtual band. And allocating a virtual address corresponding to the logical block address specified in the command, and accessing a location of the storage medium corresponding to the assigned virtual address.

According to an embodiment of the inventive concept, the allocating of the virtual band may include assigning the virtual band to another logical band when there is no virtual band allocated to the logical band including the logical block address specified by the command. It is desirable to assign a new virtual band that is not assigned.

According to an embodiment of the inventive concept, the allocating of the virtual band may include a virtual address not allocated to the logical block address in the virtual band allocated to the logical band including the logical block address specified by the command. If there is no remaining, it is desirable to allocate a new virtual band that is not assigned to another logical band.

According to an embodiment of the inventive concept, when the command includes a write command and a virtual address corresponding to a logical block address designated by the write command is previously assigned in the virtual band, It is desirable to invalidate the virtual address assigned to.

According to an embodiment of the inventive concept, the method may further include rewriting based on a newly allocated virtual band by selecting only data written to a valid virtual address of the virtual band.

According to an embodiment of the inventive concept, a structure in which a plurality of virtual bands are allocated for each physical zone of the storage medium, and sequentially in an inner circumferential direction or an outer circumferential direction in a physical area of a storage medium corresponding to the virtual band It is preferable to access the storage medium so that data can be written to.

According to an embodiment of the inventive concept, accessing the storage medium may include searching for a virtual address to be accessed using a mapping table based on a virtual band allocated to the logical band, and searching for the found virtual address. And preferably accessing a location of said storage medium corresponding to.

According to an embodiment of the inventive concept, the mapping table preferably includes virtual address information last accessed for each logical band, virtual band, and virtual band corresponding to at least a logical block address.

According to another aspect of the inventive concept, a storage medium access method includes adjusting a size of a virtual band for classifying physical storage spaces of a storage medium, and based on the resized virtual band. Accessing the storage medium.

According to another aspect of the inventive concept, a method of writing data may include converting a logical block address designated in a write command into a physical address of the disk by using a virtual zone and a virtual band corresponding to a physical area of the disk. Generating a drive signal for moving the magnetic head to the physical address position of the disk, and performing a data write at the physical address position of the disk to which the magnetic head is moved according to the drive signal. According to one command, a plurality of physical zones of the disk are integrated into a single virtual zone, or a single physical zone is divided into a plurality of virtual zones.

According to an embodiment of the inventive concept, a plurality of logical bands are allocated to the virtual zone, and a logical band corresponding to the logical band includes a logical block address specified by a received write command. Preferably, the virtual band included in the virtual zone is allocated.

According to an embodiment of the inventive concept, the size of the virtual band may be adjusted according to an initially set second command.

According to an embodiment of the inventive concept, the logical block address specified in the write command may be set so that data is sequentially written in either the inner circumferential direction or the outer circumferential direction of the disk based on the virtual zone and the virtual band. It is desirable to translate to the physical address of the disk.

According to an embodiment of the inventive concept, the step of converting the physical address of the disk into a virtual band included in a virtual zone corresponding to the logical band includes a logical band including a logical block address specified by the write command. Allocating a band, converting a logical block address specified in the write command into a virtual address based on the allocated virtual band, and converting the converted virtual address into the physical address. Do.

According to an embodiment of the inventive concept, the allocating of the virtual band may be performed when there is no virtual band allocated to the logical band including the logical block address specified by the write command. Among the virtual bands included in the zone, it is preferable to allocate a new virtual band that is not assigned to another logical band.

According to an embodiment of the inventive concept, the allocating of the virtual band may include: a virtual address not allocated to a logical block address in a virtual band allocated to a logical band including a logical block address specified by the write command; If is not left, it is preferable to allocate a new virtual band that is not assigned to another logical band among the virtual bands included in the virtual zone.

According to an embodiment of the inventive concept, the allocating of the virtual band may include performing a different logical band among virtual bands included in a physical zone corresponding to a logical band including a logical block address specified by the write command. If there is a virtual band not assigned to the logical band, assigning a virtual band not assigned to the other logical band to a logical band including a logical block address designated in the write command, and a logical designated by the write command. If there is no virtual band allocated to another logical band among the virtual bands included in the physical zone corresponding to the logical band including the block address, the virtual band is allocated to another logical band included in another physical zone of the virtual zone. Recall an unimagined band It is preferable to include the step of assigning to a logical band containing a logical block address specified in the write command.

According to an embodiment of the inventive concept, the logical block address designated by the write command is converted into an unassigned virtual address in the allocated virtual band, and corresponding to the logical block address designated by the write command. In the case where the virtual address already exists, it is desirable to invalidate the existing virtual address.

According to still another aspect of the inventive concept, a storage device may include a storage medium for storing data, a storage medium interface for accessing or writing data to and accessing the storage medium, and writing or writing data to the storage medium. A processor to control the storage medium interface to read data from the virtual zone, wherein the processor is configured to consolidate the plurality of physical zones of the storage medium into a single virtual zone or to divide a single physical zone into a plurality of virtual zones. And control the storage medium interface to access the storage medium based on the virtual zone.

According to an embodiment of the inventive concept, the processor may adjust the sizes of the plurality of virtual bands allocated for each physical zone of the storage medium according to a received command.

According to an embodiment of the inventive concept, the processor may convert a logical block address specified by a command received using the virtual zone into a physical address of the storage medium.

According to an embodiment of the inventive concept, the processor may assign a logical block address specified in a write command so that data is sequentially written in one direction from the storage medium using the virtual zone, and the physical address of the storage medium. Is preferably converted to.

According to an embodiment of the inventive concept, the processor is a first processor that extracts a logical block address specified by a received command, and converts the extracted logical block address into a virtual address based on the virtual zone. And a third processor for converting the translated virtual address into a physical address of the storage medium and controlling the storage medium interface to access the storage medium according to the translated physical address.

According to an embodiment of the inventive concept, the second processor allocates a virtual band included in a virtual zone corresponding to the logical band to a logical band including the extracted logical block address and the allocation. It is preferable to perform a process of converting the extracted logical block address into a virtual address based on the extracted virtual band.

According to an embodiment of the inventive concept, in the case where there is no virtual band allocated to the logical band including the extracted logical block address, the second processor includes a virtual band included in the virtual zone. Among them, it is preferable to allocate a new virtual band that is not assigned to another logical band.

According to an embodiment of the inventive concept, when the virtual band in which the writeable address does not remain is allocated to the logical band including the extracted logical block address, the second processor may be assigned to the virtual zone. It is desirable to allocate a new virtual band among the included virtual bands that is not assigned to another logical band.

According to an embodiment of the inventive concept, the second processor may not be allocated to another logical band among virtual bands included in a physical zone corresponding to a logical band including a logical block address specified by the write command. If no virtual band exists, it is preferable to assign a virtual band included in another physical zone of the virtual zone and not allocated to another logical band to a logical band including a logical block address specified in the received command. Do.

According to another aspect of the inventive concept, a computer system includes a host device that issues a command for operating a connected storage device, and stores data transmitted from the host device based on a command issued by the host device to a storage medium. A storage device for writing to or reading data from the storage medium and transmitting the data to the host device, wherein the storage device stores a plurality of physical zones of the storage medium in a single virtual zone according to a first command received from the host device. The virtual zone is configured to be integrated or to divide a single physical zone into a plurality of virtual zones, and access the storage medium based on the virtual zone.

According to an embodiment of the inventive concept, the storage device may adjust the sizes of the plurality of virtual bands allocated for each physical zone of the storage medium according to a second command received from the host device. .

According to another aspect of the inventive concept, a parameter adjusting method of a storage device may include downloading a parameter adjusting program for a storage device from a terminal connected to a network, and executing the parameter adjusting program for the downloaded storage device. Wherein the program for parameter adjustment for the storage device comprises: the virtual zone such that a plurality of physical zones of a storage medium constituting a storage device are integrated into a single virtual zone or a single physical zone is divided into a plurality of virtual zones. The code for performing the task of adjusting the first parameter value for determining the size of the storage device or the parameter adjusting program for the storage device may determine the second parameter value for determining the size of the plurality of virtual bands allocated for each physical zone of the storage medium. Adjust It includes the code to perform the scrubbing.

A storage medium according to another aspect of the inventive concept is recorded with program codes for executing a storage medium access method, a data writing method, or a parameter adjusting method of a storage device in a computer.

According to the present invention, by flexibly adjusting the virtual zone and the virtual band in the address mapping method using the virtual address, an effect of improving access performance is generated.

In detail, the virtual bands are managed by consolidating a plurality of physical zones into a single virtual zone according to the use of the storage device, so that when access commands to one physical zone are concentrated, they are assigned to another physical zone. Virtual bands can be used to allocate virtual addresses, thereby improving access performance.

In addition, by operating a virtual band by dividing one physical zone into a plurality of virtual zones according to a use purpose of the storage device, a seek time for performing an access command may be reduced.

In addition, by adjusting the size of the virtual band according to the use purpose of the storage device, the effect of improving the access performance of the data storage device is generated. That is, by adjusting the size of the virtual band to suit the frequency of update or the size of the file to be stored, the access performance of the storage device can be improved.

1A is a block diagram of a computer system according to an embodiment of the inventive concept.
1B is a block diagram of a computer system according to another embodiment of the inventive concept.
2 is a software operating system diagram of a storage device according to an embodiment of the inventive concept.
3 is a plan view of a head disk assembly of a disk drive according to an embodiment of the inventive concept.
4A is an electrical configuration diagram of a disk drive according to an embodiment of the inventive concept.
4B is an electrical configuration diagram of a disk drive according to another embodiment of the inventive concept.
5 is a diagram showing a sector structure of one track of a disk which is a storage medium to which the present invention is applied.
FIG. 6 is a diagram illustrating a structure of the servo information area illustrated in FIG. 5.
7 conceptually illustrates a track shape according to flux generation in a shingle light method according to an embodiment of the inventive concept.
8 conceptually illustrates a track shape according to an adjacent track interference phenomenon in a shingle light method according to an embodiment of the inventive concept.
9 is a diagram illustrating a physical zone and a virtual band configuration for a storage medium according to an embodiment of the inventive concept.
FIG. 10 is a diagram schematically illustrating a structure of a virtual band allocated to a logical band for each physical zone of a storage medium according to an embodiment of the inventive concept.
FIG. 11 is a detailed block diagram illustrating a processor and a RAM of a storage device according to an embodiment of the inventive concept.
12 is a detailed block diagram of the address translation processor shown in FIG.
FIG. 13 is a detailed configuration diagram of the second processor shown in FIG. 12.
14 is a diagram illustrating an example of adjusting the size of a virtual band according to an embodiment of the inventive concept.
15 is a diagram illustrating a configuration example of a virtual zone according to an embodiment of the inventive concept.
15 is a diagram illustrating a configuration example of a virtual zone according to another exemplary embodiment of the inventive concept.
17 is a flowchart illustrating a storage medium access method according to an embodiment of the inventive concept.
18 is a detailed flowchart of the virtual zone configuration process shown in FIG. 17.
19 is a detailed flowchart of processing the access process shown in FIG.
20 is a detailed flowchart of processing the storage medium access shown in FIG.
21 is a detailed flowchart of processing the access process shown in FIG. 17 in the disk drive of FIG.
22 is a flowchart illustrating a storage medium access method according to another embodiment of the inventive concept.
FIG. 23 is a detailed flowchart of the virtual band size adjustment process shown in FIG. 22.
24 is a detailed flowchart of processing the access process shown in FIG.
25 is a detailed flowchart of processing the storage medium access shown in FIG. 24.
FIG. 26 is a detailed flowchart of processing the access process shown in FIG. 22 in the disk drive of FIG.
27 is a flowchart illustrating a storage medium access method according to another embodiment of the inventive concept.
28 is a flowchart of a data writing method according to another embodiment of the inventive concept.
29 is a flowchart illustrating a garbage collection process according to another embodiment of the inventive concept.
30 is a view illustrating a mapping structure in a virtual band according to shingles according to the spirit of the present invention.
FIG. 31 is a diagram illustrating a mapping structure in a virtual band when data of LBAs 2 and 3 is updated in the shimmered state as shown in FIG. 30.
32 illustrates a mapping structure in virtual bands before and after the garbage collection process.
33 is a diagram illustrating a network configuration of a method of adjusting a parameter of a storage device through a network according to an embodiment of the inventive concept.
34 is a flowchart illustrating a parameter adjusting method of a storage device for adjusting a virtual zone configuration and a virtual band size for a storage medium through a network according to an embodiment of the inventive concept.

Embodiments according to the spirit of the present invention will be described in detail with reference to the accompanying drawings. However, embodiments of the inventive concept may be modified in many different forms and should not be construed as limited to the scope of the invention as set forth below. Embodiments according to the spirit of the present invention are provided to more completely describe the present invention to those skilled in the art. In the accompanying drawings, like numerals always mean like elements.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1A, a computer system according to an embodiment of the inventive concept includes a storage device 1000A, a host device 2000, and a connector 3000.

In detail, the storage device 1000A may include a processor (PROCESSOR) 110, a ROM 120, a RAM 130, a storage medium interface (storage medium I / F) 140, a storage medium 150, and a host interface HOST I. / F (160) and a bus (BUS) 170.

The host device 2000 issues a command for operating the storage device 1000A, transmits the command to the storage device 1000A connected through the connector 3000, and transmits data with the storage device 1000A according to the issued command. Follow the process of getting or receiving.

The connector 3000 is a means for electrically connecting the interface port of the host device 2000 and the interface port of the storage device 1000A. The connector 3000 may include a data connector and a power connector. For example, in case of using a Serial Advanced Technology Attachment (SATA) interface, the connector 3000 may include a 7-pin SATA data connector and a 15-pin SATA power connector.

First, the constituent means of the storage device 1000A will be described.

The processor 110 interprets the command and controls the constituent means of the data storage device according to the interpreted result. The processor 110 includes a code object management unit, and loads the code object stored in the storage medium 150 into the RAM 130 using the code object management unit. The processor 110 loads the code objects to the RAM 130 to execute the storage medium access method according to the flowcharts of FIGS. 17 to 29 and the parameter adjustment method of the storage device according to the flowchart of FIG. 34.

Then, the processor 110 uses the code objects loaded in the RAM 130 to perform a task for a storage medium access method according to the flowcharts of FIGS. 17 to 29, and a parameter adjusting method of the storage device according to the flowchart of FIG. 34. task). A storage medium access method, a data write method, and a parameter adjusting method of the storage device executed by the processor 110 will be described in detail with reference to FIGS. 17 to 29 and 34 below.

The ROM (Read Only Memory) 120 stores program codes and data necessary for operating the data storage device.

In the random access memory (RAM) 130, program codes and data stored in the ROM 120 or the storage medium 150 are loaded under the control of the processor 110.

The storage medium 150 may include a disk or a nonvolatile memory device as a main storage medium of the storage device. The storage device may include a disk drive as an example, and the detailed configuration of the head disk assembly 100 including the disk and the head in the disk drive is shown in FIG. 3.

Referring to FIG. 3, the head disk assembly 100 includes at least one disk 12 that is rotated by the spindle motor 14. The disk drive also includes a head 16 positioned adjacent to the disk 12 surface.

The head 16 can read or write information to the rotating disk 12 by sensing and magnetizing the magnetic field of each disk 12. Typically the head 16 is coupled to the surface of each disk 12. Although illustrated and described as a single head 16, it should be understood that this consists of a recording head for magnetizing the disc 12 and a separate reading head for sensing the magnetic field of the disc 12. The read head is constructed from Magneto-Resistive (MR) elements. The head 16 may also be referred to as a magnetic head or a transducer.

Head 16 may be integrated into slider 20. The slider 20 is configured to create an air bearing between the head 16 and the surface of the disk 12. The slider 20 is coupled to the head gimbal assembly 22. The head gimbal assembly 22 is attached to an actuator arm 24 having a voice coil 26. The voice coil 26 is located adjacent to the magnetic assembly 28 to specify a voice coil motor 30 (VCM). The current supplied to the voice coil 26 generates a torque for rotating the actuator arm 24 relative to the bearing assembly 32. Rotation of the actuator arm 24 causes the head 16 to move across the disk 12 surface.

The information is typically stored in an annular track of the disc 12. Each track 34 includes a plurality of sectors. The sector configuration for one track is shown in FIG.

As shown in FIG. 5, one servo sector section T may include a servo information area S and a data area, and the data area may include a plurality of data sectors D. Of course, a single data sector D may be included in one servo sector section. The data sector D will be referred to as a sector.

In the servo information area S, signals as shown in FIG. 6 are recorded in detail.

As illustrated in FIG. 6, a preamble 601, a servo synchronization display signal 602, a gray code 603, and a burst signal 604 are recorded in the servo information area S. FIG.

The preamble 601 provides clock synchronization when reading servo information, and also provides a constant timing margin by putting a gap in front of the servo sector. Then, it is used to determine the gain (not shown) of the automatic gain control (AGC) circuit.

The servo synchronization indication signal 602 is composed of a servo address mark (SAM) and a servo index mark (SIM). The servo address mark is a signal indicating the start of a servo sector, and the servo index mark is a signal indicating the start of the first servo sector in the track.

The gray code 603 provides track information, and the burst signal 604 is a signal used to control the head 16 to follow the center of the track 34. For example, A, B, C, and D are four signals. It consists of a pattern. That is, the four burst patterns are combined to generate a position error signal used in the track following control.

The disk 12 is divided into a maintenance cylinder area inaccessible to the user and a user data area inaccessible to the user. The maintenance cylinder area is also called a system area. Various information necessary for controlling the disk drive is stored in the maintenance cylinder area, as well as information necessary for performing the storage medium access method, the data writing method, and the parameter adjusting method of the storage device according to the present invention. In particular, a mapping table for converting a logical block address (LBA) into a virtual address (VA) based on a virtual zone or a virtual band is stored in the maintenance cylinder region.

The head 16 is moved across the surface of the disc 12 to read or write information on other tracks. The disk 12 may store a plurality of code objects for implementing various functions as a disk drive. As an example, a code object for performing an MP3 player function, a code object for performing a navigation function, a code object for performing various video games, and the like may be stored in the disk 12.

Referring back to FIG. 1A, the storage medium interface 140 is a constituent means for processing the processor 110 to access the storage medium 150 to write or read information. The storage medium interface 140 in a storage device implemented as a disk drive includes a servo circuit for controlling the head disk assembly 100 in detail and a read / write channel circuit for performing signal processing for data read / write.

The host interface 160 is a means for executing data transmission / reception processing with the host device 2000 such as a personal computer, a mobile device, and the like, for example, a Serial Advanced Technology Attachment (SATA) interface and a Parallel Advanced Technology Attachment (PATA) interface. Various standard interfaces such as USB and Universal Serial Bus (USB) interfaces are available.

The bus 170 serves to transfer information between the constituent means of the storage device.

Next, a software operating system of a hard disk drive, which is an example of a storage device, will be described with reference to FIG. 2.

As illustrated in FIG. 2, a plurality of code objects Code Objects 1 to N are stored in the disk 150A, which is a storage medium of the hard disk drive HDD.

The ROM 120 stores a boot image and a packed RTOS image.

A plurality of code objects CODE OBJECT 1 to N are stored in the disk 150A. The code objects stored in the disk may include not only code objects required for the operation of the disk drive but also code objects related to various functions that can be extended to the disk drive. In particular, the code objects for executing the storage medium access method according to the flowcharts of FIGS. 17 to 29 and the parameter adjustment method of the storage device according to the flowchart of FIG. 34 are stored in the disk 150A. Of course, code objects for executing the method according to the flowcharts of FIGS. 17 to 29 and 34 may be stored in the ROM 120 instead of the disk 150A. In addition, code objects that perform various functions such as an MP3 player function, a navigation function, a video game function, and the like may also be stored in the disk 150A.

The RAM 130 loads an unpacked RTOS image by reading a boot image from the ROM 120 during a booting process. In addition, code objects required for performing a host interface stored in the disk 150A are loaded into the RAM 130. Of course, an area DATA AREA for storing data is also allocated to the RAM 130.

The channel circuit 200 includes circuits necessary for performing signal processing for data read / write, and the servo circuit 210 includes a head disk assembly 100 to perform data read / write operations. The circuits necessary to control) are embedded.

RTOS (Real Time Operating System) 110A is a real-time operating system program, a multi-program operating system using a disk. Depending on the task, multi-processing is performed in real time in the foreground with high priority, and batch processing is performed in the background with low priority. Then, the code object from the disk is loaded and the code object is unloaded to the disk.

RTOS (Real Time Operating System) 110A is a Code Object Management Unit (COMU) 110-1, Code Object Loader (COL, 110-2), Memory Handler (Memory Handler; MH, 110-3), the channel control module (CCM) 110-4 and the servo control module (SCM) 110-5 are managed to execute a task according to the requested command. The RTOS 110A also manages application programs 220.

In detail, the RTOS 110A loads code objects necessary for disk drive control into the RAM 130 during the booting process of the disk drive. Therefore, after executing the booting process, the disk drive may be operated using the code objects loaded in the RAM 130.

The COMU 110-1 stores the positional information where the code objects are recorded, and performs a process of arbitrating the bus. It also stores information about the priority of tasks that are running. It also manages task control block (TCB) information and stack information necessary for performing tasks on code objects.

The COL 110-2 loads the code objects stored in the disk 150A into the RAM 130 using the COMU 110-1, or the code objects stored in the RAM 130 in the disk 150A. Unloading is performed. Accordingly, the COL 110-2 may load the code objects into the RAM 130 for executing the method according to the flowcharts of FIGS. 17 to 29 and 34 stored in the disk 150A.

The RTOS 110A may execute the method according to the flowcharts of FIGS. 17 to 29 and 34, which will be described below, using the code objects loaded into the RAM 130.

The MH 110-3 performs a process of writing or reading data to the ROM 120 and the RAM 130.

The CCM 110-4 performs channel control necessary to perform signal processing for data read / write, and the SCM 110-5 performs servo control including a head disk assembly to perform data read / write. do.

1B is a block diagram of a computer system according to another embodiment of the inventive concept.

In the storage device 1000B of the computer system as shown in FIG. 1B, a nonvolatile memory device 180 is added to the storage device 1000A shown in FIG. 1A. In FIG. 1B, the storage medium 150 may be implemented as a disk.

The nonvolatile memory device 180 may be implemented as a nonvolatile semiconductor memory device. For example, the nonvolatile memory device 180 may be implemented as a flash memory, a phase change RAM (PRAM), a ferroelectric RAM (FRAM), a magnetic RAM (MRAM), or the like.

The nonvolatile memory device 180 may store some or all of data to be stored in the storage device 1000B. As an example, various information required for controlling the storage device 1000B may be stored in the nonvolatile memory device 180.

In addition, program code and information for executing the method according to the flowcharts of FIGS. 17 to 29 and 34 may be stored in the nonvolatile memory device 180. In detail, a mapping table for converting a logical block address into a virtual address based on a virtual zone or a virtual band may be stored in the nonvolatile memory device 180. In addition, code objects for implementing various functions of the storage device may be stored in the nonvolatile memory device 180. When the mapping table is stored in the nonvolatile memory device 180, the storage device is stored in the nonvolatile memory device 180 to load the mapping table into the RAM 130.

Duplicate descriptions of the same constituent means already described in the computer system of FIG. 1A will be avoided.

Next, an electrical circuit configuration of the disk drive 1000A ', which is an example of a storage device, according to an embodiment of the inventive concept shown in FIG. 1A is illustrated in FIG. 4A.

As shown in FIG. 4A, the disc drive 1000A ′ according to an embodiment of the inventive concept may include a preamplifier 410, a read / write channel 420, and a processor 430. And a voice coil motor driver 440 (VCM driver), a spindle motor driver 450 (SPM driver), a ROM 460, a RAM 470, and a host interface 480.

The processor 430 may be a digital signal processor (DSP), a microprocessor, a microcontroller, or the like. The processor 430 read / write channel for reading information from or writing information to the disk 12 according to a command received from the host device 2000 via the host interface 480. Control 420.

The processor 430 is coupled to a voice coil motor (VCM) driver 440 that supplies a driving current for driving the voice coil motor 30 (VCM). The processor 430 supplies a control signal to the VCM driver 440 to control the movement of the head 16.

The processor 430 is also coupled to a SPM (Spindle Motor) driver 450 that supplies a drive current for driving the spindle motor 14 (SPM). When power is supplied, the processor 430 supplies a control signal to the SPM driver 450 to rotate the spindle motor 14 at a target speed.

Processor 430 is coupled to ROM 460 and RAM 470, respectively. The ROM 460 stores firmware and control data for controlling the disk drive. Program code and information for executing the method according to the flowcharts of FIGS. 17-29 and 34 may be stored in the ROM 460. Of course, program codes and information for executing the method according to the flowcharts of FIGS. 17-29 and 34 may be stored in the maintenance cylinder region of the disk 12 instead of the ROM 460.

In the RAM 470, program codes stored in the ROM 460 or the disk 12 are loaded in the initialization mode under the control of the processor 430, and are read from the data or the disk 12 received through the host interface 480. The generated data is stored temporarily.

The RAM 470 may be implemented with DRAM or SRAM. In addition, the RAM 470 may be designed to be driven by a single data rate (SDR) method or a double data rate (DDR) method.

The processor 430 may control the disk drive to execute the method according to the flowcharts of FIGS. 17 to 29 and 34 using program codes and information stored in the maintenance cylinder area of the ROM 460 or the disk 12. It becomes possible.

Next, an electrical circuit configuration of a disk drive 1000B ', which is an example of a storage device, according to an embodiment of the inventive concept shown in FIG. 1B is illustrated in FIG. 4B.

The disk drive 1000B 'as shown in FIG. 4B has a nonvolatile memory device 490 added to the disk drive 1000A' shown in FIG. 4A. The nonvolatile memory device 490 may store a part of data to be stored in the disk drive 1000B '. As an example, various information required for controlling the disk drive 1000B 'may be stored in the nonvolatile memory device 490.

The nonvolatile memory device 490 may store program codes and information for executing the method according to the flowcharts of FIGS. 17 to 29 and 34. In detail, a mapping table for converting a logical block address into a virtual address based on a virtual zone or a virtual band may be stored in the nonvolatile memory device 490. In addition, code objects for implementing various functions of the storage device may be stored in the nonvolatile memory device 490.

The processor 430 is coupled to the ROM 460, the RAM 470, and the nonvolatile memory device 490, respectively. The ROM 460 stores firmware and control data for controlling the disk drive. Program code and information for executing the method according to the flowcharts of FIGS. 17-29 and 34 may be stored in the ROM 460. Of course, program codes and information for executing the method according to the flowcharts of FIGS. 17-29 and 34 may be stored in the maintenance cylinder region of the disk 12 or the nonvolatile memory device 490 instead of the ROM 460. have.

The RAM 470 may load program codes and information stored in the ROM 460, the disk 12, or the nonvolatile memory device 490 under the control of the processor 430 in an initialization mode.

Duplicate description of the same constituent means already described in the disk drive 1000A 'of FIG. 4A will be avoided.

Next, a data read operation and a data write operation of the disk drive will be described with reference to FIG. 4A or 4B.

In the data read mode, the disc drive amplifies in the preamplifier 410 the electrical signal sensed by the head 16 from the disc 12. Then, amplify the signal output from the preamplifier 410 by an automatic gain control circuit (not shown) that automatically varies the gain in accordance with the magnitude of the signal in the read / write channel 420, which is then converted into a digital signal. After conversion to, decoding is performed to detect data. After the processor 430 performs an error correction process using the Reed Solomon code, which is an error correction code, as an example, the data is converted into stream data and transmitted to the host device 2000 through the host interface 480.

In the data write mode, the disk drive receives data from the host device through the host interface 480, adds a symbol for error correction by the Reed Solomon code in the processor 430, and read / write channel 420. After the encoding process is performed so as to suit the recording channel, the recording current is amplified by the preamplifier 410 and recorded on the disc 12 through the head 16.

Next, an operation of executing the method according to the flowcharts of FIGS. 17 to 29 and 34 in the processor 430 using the program code and information loaded in the RAM 470 will be described.

First, a shingle write method, which is a new write method proposed to increase the recording density in a disk drive, which is one of the storage devices according to the present invention, will be described.

The shingle light method is a light method that executes light in one direction while overlapping each other as if tracks of the disk are stacked. That is, as shown in FIG. 7, the shingle write method partially overwrites the N-1 track when writing the N track adjacent to the N-1 track, assuming that the write in the arrow direction is performed. By partially overwriting the N tracks when writing adjacent N + 1 tracks, the TPI (Track Per Inch) characteristic, which is the recording density in the radial direction of the storage medium, can be enhanced.

This shingle light always generates flux in one direction, so the N-1 track cannot be written after the N track is written. If the N-1 track is written in the opposite direction to the shingle light advancing direction after the N track is written as shown in FIG. 8, the N track is erased due to the ATI (Adjacent Track Interference) effect.

Therefore, in order to solve this problem, a technique of dynamically allocating a new disk address for the LBA (Logical Block Address) provided by the host so that the write is always performed only in one of the inner and outer directions of the disk may be performed. It became necessary.

In the present invention, in the process of converting the existing LBA to the physical address of the disk drive (Cylinder Head Sector) by using a virtual address (Virtual Address) as it is, using the existing LBA as the direction of the shingles in the disk drive direction We propose a method that can access a disk to satisfy a condition that is limited only by

Referring to FIG. 9, a zone and virtual band configuration for implementing an access method proposed by the present invention will be described.

The storage area of the disk 12 is divided into a plurality of physical zones. A track density per track (TPI) or bit per inch (BPI) value, which is a recording density, may be set differently for each physical zone. Each physical zone includes a plurality of virtual bands (VBs), and each virtual band is set to a set of M overwritten consecutive tracks. Then, a guard track is placed between the virtual bands so that the virtual bands are not overwritten. Referring to FIG. 9, K virtual bands VB_1 to VB_K are allocated to physical zone 1. That is, the virtual band means that the physical storage space of the storage medium is classified into a unit size.

Next, an allocation structure of logical bands and virtual bands for each zone will be described with reference to FIG. 10.

FIG. 10 is a diagram illustrating an allocation structure of a virtual band (VB) for a logical band (LB) for each physical zone of a storage medium according to an embodiment of the inventive concept.

As shown in FIG. 10, a virtual band is allocated to a logical band to perform an actual write operation in a physical zone of a storage medium. Physical zone 1 of the storage medium may consist of K logical bands. Here, the logical band is defined as a set of consecutive logical block addresses of the first size unit. That is, a logical band means a set of writeable contiguous logical block addresses.

For example, suppose that the logical block addresses of physical zone 1 consist of 1,000 LBAs ranging from 0 to 999, and the logical bands belonging to physical zone 1 are each set to 100 LBA sets. The number of logical bands included in is 10. That is, K = 10.

At this time, the number of virtual bands is set to Q (Q> K) more than the number of logical bands. Here, the virtual band may be set by classifying the physical storage space of the storage medium in a second size unit. In other words, when the storage medium is a disk, the virtual band is set to a set of M overwritten tracks as described in FIG.

Among the virtual bands, virtual bands not allocated to the logical band may be referred to as a reserved virtual band. In other words, the storage area corresponding to the virtual bands not allocated to the logical band may be referred to as a reserved area. The reserved virtual band information is stored in a free queue, which will be described later with reference to FIG. 13.

Next, an operation of accessing the storage device using the logical band will be described.

FIG. 11 illustrates a processor 110 and a RAM 130 of the storage device shown in FIGS. 1A and 1B or a processor 430 of the disk drive shown in FIGS. 4A and 4B, according to an embodiment of the inventive concept. And a detailed configuration diagram of the RAM 470. For convenience of description, FIG. 11 will be described with reference to the disk drives of FIGS. 4A and 4B.

As shown in FIG. 11, the processor 430 includes a virtual band size adjusting unit 430-1, a virtual zone setting unit 430-2, and an address translation processor 430-3. The mapping table 470-1 is loaded.

The mapping table 470-1 may be loaded from the ROM 460, the disk 12, or the nonvolatile memory device 490. The mapping table 470-1 is defined to search for a virtual address based on the LBA. The virtual address may be defined based on the physical address in the storage medium. In the case where the storage medium is a disk, the virtual address may be defined based on the physical address of the sector. In addition, the virtual address in the disk may be defined based on the cylinder head sector (CHS). In addition, virtual addresses in the disc may be defined based on virtual zones or physical zones, virtual bands, tracks, and sectors.

When the virtual zone is not set, the mapping table 470-1 may include information indicating an allocation structure of logical bands and virtual bands for each physical zone. That is, the mapping table 470-1 may include information indicating a mapping structure of virtual bands allocated to logical bands for each physical zone as illustrated in FIG. 10.

When the virtual zone is set, the mapping table 470-1 may include information indicating a mapping structure of logical bands and virtual bands for each virtual zone. That is, the mapping table 470-1 may include information indicating a mapping structure of virtual bands allocated and mapped to logical bands for each virtual zone as illustrated in FIG. 15 or 16.

The mapping table 470-1 may include information indicating a virtual address corresponding to the LBA in the virtual band allocated to the logical band. In addition, the mapping table 470-1 may include information about a sector last written for each virtual band allocated to the logical band.

The mapping table 470-1 may include information for invalidating the existing virtual address when the virtual address corresponding to the LBA designated by the write command already exists in the virtual band. That is, when updating data for the same LBA, information for invalidating a virtual address corresponding to the corresponding LBA to be updated already existing in the mapping table may be included in the mapping table 470-1.

The virtual band size adjusting unit 430-1 is a means for executing a process of adjusting the sizes of the virtual bands, and adjusts the sizes of the virtual bands according to a command received from the host device as follows.

Referring to FIG. 14, the size of the virtual band may be set equal to the size of the logical band according to a default value for a parameter for determining the virtual band size. That is, when there is no adjustment of the virtual band size, as shown in Fig. 14A, the sizes of the logical band and the virtual band can be set to be the same. 14 (A) shows that virtual bands 0 and 2 are allocated to logical bands.

When a command for reducing the sizes of the virtual bands is received by the processor 430, the virtual band size adjusting unit 430-1 changes a second parameter value for determining the virtual band size. Then, the virtual band size is reduced or expanded in accordance with the change of the second parameter value that determines the virtual band size.

14B shows an example in which the virtual band size is reduced, and FIG. 14C shows an example in which the virtual band size is expanded.

FIG. 14B shows an example in which the size of the virtual band is reduced to operate two or more virtual bands to cover the entire logical band area. That is, by configuring the logical band and the virtual band as 1: N, even if invalid data is generated for the virtual band that has been previously used for the frequently updated LBA, only valid data is selected from the virtual band. The absolute amount of data that needs to be processed in the garbage collection process, which writes to the new virtual band and reassigns the old virtual band to the free queue, is reduced. This shortens the garbage collection process execution time. For reference, the prequeue stores information about virtual bands not allocated to logical bands.

14 (C) shows an example in which the size of the virtual band is expanded to be larger than the size of the logical band. As shown in FIG. 14 (C), when the size of the virtual band is expanded, the free space increases in the virtual band, thereby pushing back the time at which the garbage collection process of arranging only valid data in the virtual band and writing to the new virtual band is executed. . This can increase the execution interval of the garbage collection process.

Therefore, in the case of storing data in which the update does not frequently occur, setting the size of the virtual band equal to the size of the logical band as shown in FIG. 14A may be effective for virtual band operation.

If it is necessary to frequently update a file having a relatively small capacity, it may be effective for virtual band operation to reduce the size of the virtual band to be smaller than the size of the logical band as shown in FIG. 14B.

Next, when it is necessary to update a relatively large file frequently, it may be effective for virtual band operation to enlarge the size of the virtual band larger than the logical band size as shown in FIG. 14C.

The virtual band size adjusting unit 430-1 may individually adjust the size of the virtual band for each physical zone of the storage medium. Also, the virtual band size adjusting unit 430-1 may adjust the size of the virtual band in all physical zones in the same manner.

The virtual bands may be adjusted in the manufacturing process of the storage device, and the virtual bands may be adjusted according to the user's needs in the user environment after the product is shipped.

Next, the virtual zone setting unit 430-2 is a means for integrating a plurality of physical zones of a storage medium into a single virtual zone or dividing a single physical zone into a plurality of virtual zones. According to the configuration, the virtual zone is configured as follows.

When the command for setting the virtual zone is received, the virtual zone setting unit 430-2 may integrate the plurality of physical zones of the storage medium into a single virtual zone according to the first parameter value that determines the virtual zone size. Alternatively, a process of dividing a single physical zone into a plurality of virtual zones is performed.

15 illustrates an example of integrating two physical zones into one virtual zone by the virtual zone setting unit 430-2. That is, as shown in FIG. 15, when the physical zones 1 and 2 of the disk are combined into the virtual zone 1, the physical zones 1 and 2 are mapped to the virtual zone 1. As a result, virtual bands allocated to physical zones 1 and 2 may be allocated regardless of the physical zone in virtual zone 1. That is, even when the host command for the physical zone 1 is intensively received and all virtual bands assigned to the physical zone 1 are all allocated to the logical band and exhausted, the physical bands are allocated using the virtual bands assigned to the physical zone 2. It is possible to execute host commands for zone 1, thereby improving the access performance of the storage device.

FIG. 16 shows an example in which one physical zone is divided into two virtual zones by the virtual zone setting unit 430-2. That is, as shown in FIG. 16, when physical zone 1 is divided into virtual zones 1 and 2, the number and area of the virtual bands allocated in the physical zone 1 are reduced, thereby accessing commands in the same virtual zone using the virtual zone. When this occurs continuously, it is possible to reduce the target track search time for access.

The address translation processor 430-3 performs a process of converting the LBA designated by the received command into physical location information of the storage medium using the virtual band and the virtual address. The detailed configuration of the address translation processor 430-3 is shown in FIG.

As shown in FIG. 12, the address translation processor 430-3 may include a first processor 430-3A, a second processor 430-3B, and a third processor 430-3C. Here, the second processor 430-3B and the third processor 430-3C may be designed to be integrated into one processor 430-3B ′. Of course, although not shown in the drawings, the first processor 430-3A and the second processor 430-3B may also be integrated into one processor and designed.

The first processor 430-3A extracts the LBA designated by the received command.

The second processor 430-3B converts the LBA extracted by the first processor 430-3A into a virtual address. That is, the second processor 430-3B searches the mapping table 470-1 to convert the LBA into a virtual address.

As shown in FIG. 13, the second processor 430-3B may include a free queue 131, an allocation queue 132, and a garbage queue 133. . The second processor 430-3B converts the LBA specified by the command into a virtual address using the prequeue 131, the allocation queue 132, and the garbage queue 133.

The second processor 430-3B stores information in virtual bands that are not allocated to logical bands in the prequeue 131 in an order according to a predetermined rule. The prequeue 131 is a means for storing virtual band information that can be allocated to a logical band according to a command and waiting for selection. The prequeue 131 may classify and store virtual band information that may be allocated to a logical band for each virtual zone or for each physical zone.

The second processor 430-3B stores information about virtual bands allocated to the logical band in the allocation queue 132. In detail, the second processor 430-3B may include a logical band in which the virtual band assigned to the logical band including the LBA specified by the command does not exist in the mapping table 470-1 or includes the LBA specified by the command. If all virtual addresses have already been allocated and exhausted in the virtual band assigned to the virtual band, the one virtual band waiting in the pre-queue 131 is selected and assigned to the logical band including the LBA specified by the command to allocate the allocation queue ( 132) (P1).

Next, the second processor 430-3B allocates a virtual address corresponding to the LBA designated by the command based on the virtual band allocated to the logical band stored in the allocation queue 132. Specifically, when the second processor 430-3B allocates a new virtual address to the logical band including the LBA specified by the command and stores the new virtual address in the allocation queue 132, the first sector of the newly allocated logical band is stored. The virtual address corresponding to is assigned to the LBA specified by the command.

The second processor 430-3B may allocate a virtual address that is not allocated in the virtual band when a virtual band already allocated to the logical band including the LBA designated by the command exists in the allocation queue 132. Assign to the LBA specified by the command. As an example, the virtual address for the sector immediately following the last accessed sector in the virtual band may be assigned to the LBA that is specified in the command.

The second processor 430-3B selects a virtual band whose number of invalidated virtual addresses according to data update exceeds a threshold among the virtual bands allocated to the logical band and moves them to the garbage queue 133 (P2).

For example, the second processor 430-3B performs a garbage collection process when the number of virtual bands stored in the prequeue 1601 is less than an initially set minimum value. In other words, the second processor 430-3B reads data stored in a sector of valid virtual addresses in the virtual band stored in the garbage queue 133, and reads data to designate the virtual band newly assigned in the pre-queue 131. Write back to the address.

The second processor 430-3B moves the information on the virtual band which has been rewritten in this manner among the virtual bands stored in the garbage queue 133 to the prequeue 131 (P3).

Next, the third processor 430-3C converts the virtual address converted by the second processor 430-3B into a physical address of the disk, and controls the storage device to access the storage medium according to the converted physical address. . That is, the third processor 430-3C converts the virtual address into CHS (Cylinder Head Sector) information indicating the physical location of the disc, and voice coils for accessing the disc based on the converted CHS (Cylinder Head Sector) information. Generates a motor drive control signal.

4A and 4B, when the voice coil motor driving control signal generated by the third processor 430-3C is applied to the VCM driver 440, the VCM driver 440 corresponds to the voice coil motor driving control signal. The voice coil motor driving current is generated and supplied to the voice coil motor 30. Accordingly, the magnetic head 16 is moved to the track position of the disc to be accessed, so that the data write or data read operation corresponding to the command can be performed.

Next, a storage medium access method according to an embodiment of the inventive concept executed by the control of the processor 110 illustrated in FIGS. 1A and 1B or the processor 430 illustrated in FIGS. 4A and 4B. This will be described with reference to the flowchart of FIG. 17.

Steps 101 (S101) and 102 (S102) shown in FIG. 17 may be performed according to different commands, respectively, and may be performed continuously or discontinuously. It is not necessary to perform step 101 (S101) every time the access process is performed. However, step 101 (S101) must be performed at least once in the storage device.

The processor 110 performs a process of configuring a virtual zone for a storage medium according to the received command (S101). That is, the processor 110 configures the virtual zone to integrate the plurality of physical zones for the storage medium 150 into a single virtual zone or to divide the single physical zone into a plurality of virtual zones. The detailed process of configuring the virtual zone is shown in FIG.

Next, a detailed operation of the process of configuring the virtual zone will be described with reference to FIG. 18.

The processor 110 determines whether a virtual zone creation command is received from the host device 2000 through the host interface 160 (S201).

When the virtual zone creation command is received as a result of the determination of step 201 (S201), the processor 110 executes a process of configuring a virtual zone for the storage medium according to the received virtual zone creation command (S202). In other words, the processor 110 configures the virtual zone in such a manner as to integrate the plurality of physical zones of the storage medium into a single virtual zone or divide the single physical zone into a plurality of virtual zones according to the received virtual zone creation command. Perform the process. As an example, as shown in FIG. 15, two physical zones 1 and 2 may be combined into virtual zone 1, and as shown in FIG. 16, one physical zone may be divided into two virtual zones. It can also be separated.

The processor 110 changes the mapping table based on the virtual zone configured in step 202 (S202) (S203). That is, the processor 110 is a mapping structure for allocating a virtual band to a logical band using virtual bands assigned to each physical zone, and a mapping structure for allocating a virtual band to a logical band using virtual bands assigned to each virtual zone. Change the mapping table.

Referring back to FIG. 17, after completing the virtual zone configuration by performing step 101 (S101) by the above operation, the processor 110 performs an access process based on the virtual zone (S102). In detail, the processor 110 performs an access process by operating virtual bands included in a virtual zone based on a virtual zone in which a physical zone of a storage medium is integrated or divided. A detailed process for performing access based on a virtual zone is shown in FIG.

Next, a detailed operation of performing access based on a virtual zone according to an embodiment of the present invention will be described with reference to FIG. 19.

The processor 110 processes the physical zone of the storage medium 150 into a virtual zone (S301). That is, the physical zone of the storage medium 150 is mapped to the virtual zone based on the virtual zone configured in step 101 (S101) of FIG. As an example, when the virtual zone is configured as shown in FIG. 15, the physical zone 1 and the physical zone 2 are mapped to the virtual zone 1.

Next, the processor 110 performs an operation of accessing the storage medium 150 based on the virtual zone (S302). That is, the storage device is controlled to access the storage medium 150 using the virtual bands included in the physical zone mapped to the virtual zone. A detailed process for the operation of accessing the storage medium 150 will be described with reference to FIG. 20.

The processor 110 allocates the virtual band VB to the logical band LB including the LBA designated by the received command based on the virtual zone (S401).

As an example, the processor 110 searches the mapping table 470-1 and when the virtual band is not assigned to the logical band including the LBA designated by the command, the logical band including the LBA designated by the command. For a new virtual band included in the virtual zone can be assigned. In addition, the processor 110 searches the mapping table 470-1 and includes the LBA specified by the command when all virtual addresses are already allocated in the virtual band allocated to the logical band including the LBA specified by the command. A new virtual band included in the virtual zone may be allocated to the logical band.

As another example, when there is a virtual band that is not assigned to another logical band among the virtual bands included in the physical zone corresponding to the logical band including the LBA specified by the command, the processor 110 may be assigned to another logical band. An unallocated virtual band can be assigned to a logical band containing the LBA specified by the command. When the virtual band is not allocated to another logical band among the virtual bands included in the physical zone corresponding to the logical band including the LBA specified by the command, the processor 110 may select another physical zone of the virtual zone. Virtual bands not allocated to other logical bands included in the zone may be allocated to the logical band including the LBA specified in the command.

Next, the processor 110 performs a process of determining the physical location of the storage medium based on the virtual band allocated to the logical band including the LBA designated by the command (S402). As an example, the processor 430 allocates a virtual address corresponding to the LBA designated by the command from the virtual band allocated in step 401 (S401), and converts the allocated virtual address into physical access location information of the storage medium. Here, the physical access location information of the storage medium may be CHS information when the storage medium is the disk 12.

The virtual address assigned to the LBA designated by the command from the above-mentioned virtual band may be determined as a virtual address representing the first sector of the virtual band in the virtual band newly assigned to the logical band. In the virtual band already allocated to the logical band, the virtual address assigned to the LBA designated by the command may be determined as a virtual address indicating the next sector consecutive to the sector written last in the virtual band.

Next, the processor 110 controls the storage device to access the storage medium based on the physical access location information converted in step 402 (S403). In other words, the processor 110 controls the storage medium interface 140 to access the storage medium to a location corresponding to the converted physical access information.

Next, a detailed operation of performing access based on a virtual zone in a disk drive according to another embodiment of the present invention will be described with reference to FIG. 21.

The processor 430 determines a logical band corresponding to the LBA designated by the received command (S501). In detail, the processor 430 determines a logical band corresponding to the LBA designated by the received command in the logical band including the LBA designated by the received command.

The processor 430 determines whether there is a virtual band allocated to the logical band determined in step 501 (S501). In detail, the processor 430 searches the mapping table 470-1 to determine whether a virtual band allocated to the logical band determined in step 501 already exists.

As a result of the determination in step 502 (S502), when there is a virtual band allocated to the logical band determined in step 501 (S501), the processor 430 determines whether there is a virtual address VA that can be allocated in the allocated virtual band. (S503). That is, it is determined whether all the virtual addresses that can be allocated in the allocated virtual band are exhausted.

If the virtual band allocated to the logical band determined in step 501 (S501) does not exist or the virtual address assignable to the allocated virtual band does not exist as a result of the determination in step 502 (S502). In operation S504, the processor 430 allocates a new virtual band to the logical band determined in step 501 based on the virtual zone. That is, the processor 430 may allocate a new virtual band included in the virtual zone for the logical band including the LBA designated by the command. In addition, when there is a virtual band that is not allocated to another logical band among the virtual bands included in the physical zone corresponding to the logical band including the LBA designated by the command, the processor 430 is not allocated to another logical band. The virtual band may be assigned to a logical band including the LBA specified by the command. In addition, when there is no virtual band allocated to another logical band among the virtual bands included in the physical zone corresponding to the logical band including the LBA specified by the command, the processor 430 may perform another physical zone of the virtual zone. Virtual bands not allocated to other logical bands included in the zone may be allocated to the logical band including the LBA specified in the command.

Next, the processor 430 allocates a virtual address VA corresponding to the LBA designated by the command based on the allocated virtual band (S505). In detail, when a new virtual address is allocated in step 504 (S504), the processor 430 may allocate a virtual address indicating a newly allocated virtual first sector to the LBA designated by the command. The processor 430 designates, in the command, a virtual address indicating a next sector consecutive to the sector written last in the virtual band when a virtual address not allocated to the LBA exists in the virtual band already allocated to the logical band. Can be assigned to an LBA.

FIG. 30 shows a mapping structure in a virtual band in which one virtual band applied to the LBA based shingle light method is composed of three tracks and one track is composed of five sectors.

As an example, when the virtual band allocated to the logical band including the LBA specified by the command by searching the mapping table 470-1 has a mapping structure as shown in FIG. 30, data is finally written in the virtual band. The sector becomes SN8. Therefore, in this case, the physical address of SN9, which is the next sector of the sector SN8 to which data was last written, is assigned as the virtual address for the LBA specified in the command. If a new virtual band is allocated, the processor 430 assigns a virtual address corresponding to the first sector of the new virtual band to the LBA designated in the received command.

In addition, when the virtual address corresponding to the LBA designated by the command has been previously assigned in the corresponding virtual band, the processor 430 processes to invalidate the previously allocated virtual address.

As an example, when a write command for designating LBA 2 and 3 is received in the state of being written according to the mapping structure of the virtual band as shown in FIG. 30, as shown in FIG. 31, the sectors SN9 of the virtual band, The virtual address is assigned to SN10 so that the data of LBA 2 and 3 are sequentially written. Then, since virtual addresses corresponding to LBAs 2 and 3 already exist in the virtual band, virtual addresses for sectors SN1 and SN6 corresponding to LBAs 2 and 3 already present in the mapping table are invalidated.

Next, the processor 430 converts the virtual address allocated in step 505 (S505) into CHS information corresponding to the physical access location information of the disk 12 (S506).

Next, the processor 430 accesses the disk 12 based on the CHS information corresponding to the physical access location information converted in step 506 (S506). In detail, the processor 430 generates a voice coil motor driving control signal for moving the magnetic head 16 to the target track position of the disk according to the converted CHS information. 4A and 4B, when the generated voice coil motor driving control signal is applied to the VCM driver 440, the VCM driver 440 may output a voice coil motor driving current corresponding to the voice coil motor driving control signal. It generates and supplies it to the voice coil motor 30. Accordingly, the magnetic head 16 is moved to the track position of the disc to be accessed, so that the data write or data read operation corresponding to the command can be performed.

By the above operation, the LBA specified in the command is converted into a virtual address so that data is sequentially written in one direction on the storage medium based on the virtual zone, and the storage medium can be accessed based on the converted virtual address. do.

Next, a storage medium access method according to another embodiment of the inventive concept executed by the control of the processor 110 illustrated in FIGS. 1A and 1B or the processor 430 illustrated in FIGS. 4A and 4B. This will be described with reference to the flowchart of FIG. 22.

Step 601 (S601) and step 602 (S602) shown in FIG. 21 may be performed according to different commands, respectively, and may be performed continuously or discontinuously. It is not necessary to perform step 601 (S601) every time the access process is performed.

The processor 110 performs a process of adjusting the virtual band size for the storage medium 150 (S601). That is, the processor 110 performs a process of adjusting the size of the physical space of the storage medium corresponding to each virtual band. The detailed process of adjusting the virtual band size will be described with reference to FIG.

The processor 110 determines whether a command for adjusting the virtual band size is received from the host device 2000 through the host interface 160 (S701).

When the virtual band adjustment command is received as a result of the determination in step 701 (S701), the processor 110 executes a process of adjusting the virtual band size for the disc according to the received virtual band adjustment command (S702). That is, the processor 110 reduces or expands the virtual band size currently set according to the received virtual band size adjustment command. As an example, as illustrated in FIG. 14A, the virtual band size may be adjusted such that the logical band and the virtual band have the same size. As illustrated in FIG. 14B, the virtual band size may be adjusted so that the size of the virtual band is smaller than the size of the logical band. In addition, as illustrated in FIG. 14C, the virtual band size may be adjusted such that the virtual band size is larger than the logical band size.

The processor 110 changes the mapping table based on the sized virtual band in step 702 (S702). That is, the processor 110 newly configures virtual bands based on the sized virtual band, and changes the mapping table 470-1 so that a virtual address corresponding to the LBA can be assigned based on the newly configured virtual bands. do.

Referring back to FIG. 21, after adjusting the virtual band size by performing step 601 (S601), the processor 110 performs an access process based on the sized virtual band (S602). That is, the processor 110 allocates a sized virtual band to a logical band corresponding to the LBA designated by the command, and controls the storage medium interface 140 to perform an access based on the allocated virtual band. A detailed process for performing access based on the sized virtual band is shown in FIG.

Next, a detailed operation of performing access based on the resized virtual band according to an embodiment of the present invention will be described with reference to FIG. 24.

The processor 110 maps the physical storage space of the storage medium 150 to the resized virtual band (S801). That is, as an example, the processor 110 virtually divides and maps the physical storage space of the storage medium 150 into sized virtual bands as shown in FIG. 14.

Next, the processor 110 controls the storage device to access the storage medium 150 based on the sized virtual band (S802). A process for the detailed operation of accessing a storage medium is shown in FIG.

An operation of accessing a storage medium will be described with reference to FIG. 25.

The processor 110 allocates a virtual band to the logical band including the LBA specified by the received command based on the physical zone of the storage medium (S901).

In detail, the processor 110 searches the mapping table 470-1, and when the virtual band is not assigned to the logical band including the LBA specified by the command, the processor 110 searches for the logical band including the LBA specified by the command. For example, a new virtual band included in a physical zone can be allocated. In addition, the processor 110 searches the mapping table 470-1 and includes the LBA specified by the command when all virtual addresses are already allocated in the virtual band allocated to the logical band including the LBA specified by the command. A new virtual band included in the physical zone can be allocated to the logical band.

Next, the processor 110 performs a process of determining the physical location of the storage medium based on the virtual band allocated to the logical band including the LBA designated by the command (S902). That is, the processor 110 allocates a virtual address corresponding to the LBA designated by the command from the virtual band allocated in step 902 (S902), and converts the allocated virtual address into physical location information of the storage medium. As an example, when the storage medium is a disk, the physical location information may be CHS information.

In detail, the virtual address allocated to the LBA designated by the command may be determined as a virtual address representing the first sector of the virtual band in the virtual band newly assigned to the logical band. In the virtual band already allocated to the logical band, the virtual address assigned to the LBA designated by the command may be determined as a virtual address indicating the next sector consecutive to the sector written last in the virtual band.

Next, the processor 110 controls the storage device to access the storage medium based on the physical location information converted in step 902 (S902). In other words, the processor 110 controls the storage medium interface 140 to access the storage medium to a location corresponding to the converted physical access information.

Next, a detailed operation of performing access based on the resized virtual band in the disk drive according to another embodiment of the present invention will be described with reference to FIG. 26.

Step 501 (S501) to step 503 (S503), step 505 (S505) to step 507 (S507) of the flowchart of FIG. 26 are shown in step 501 (S501) to step 503 (S503) and step 505 (S505) shown in FIG. ) Since the same operation as that of step 507 (S507) is performed, duplicate description will be avoided.

Therefore, only the components 504A (S504A) which are different components from the flowchart of FIG. 21 will be described.

As a result of the determination in step 502 (S502), there is no virtual band allocated to the logical band determined in step 501 (S501) or the virtual address not assigned to the LBA in the virtual band allocated to the logical band as a result of the determination in step 502 (S502). If does not exist, the processor 110 allocates a new virtual band included in the physical zone for the logical band determined in step 501 (S501). Here, the newly allocated virtual band may be selected from among the virtual bands stored in the prequeue 131 shown in FIG. 13.

Next, a storage medium access according to another embodiment of the inventive concept executed by the control of the processor 110 shown in FIGS. 1A and 1B or the processor 430 shown in FIGS. 4A and 4B. The method will be described with reference to the flowchart of FIG. 27.

The processor 110 performs a process of configuring a virtual zone for the storage medium 150 (S1001). Detailed processes for configuring the virtual zone have been described in detail with reference to FIG. 18, and thus redundant descriptions will be omitted.

Next, the processor 110 performs a process of adjusting the virtual band size for the storage medium 150 (S1002). The detailed process of adjusting the virtual band size has been described in detail with reference to FIG. 23, and thus redundant descriptions will be omitted.

After finishing the virtual zone configuration and the virtual band size adjustment, the processor 110 performs an access process based on the virtual zone and the virtual band (S1003). Since the access process based on the virtual zone and the virtual band has been described in detail with reference to FIGS. 19 to 21 and 24 to 26, duplicate descriptions will be omitted.

For reference, in an embodiment of the present invention according to the flowchart shown in FIG. 17, an access process is performed after performing a virtual zone configuration process. In addition, in another embodiment of the present invention according to the flowchart shown in FIG. 22, the access process is performed after performing the virtual band size adjusting process. In contrast, another embodiment of the present invention according to the flowchart shown in FIG. 27 performs an access process after performing a virtual zone process and a virtual band size adjustment process, respectively.

Next, a method of performing a data write process based on a virtual zone or a resized virtual band in a disk drive according to another embodiment of the present invention will be described with reference to FIG. 28.

The processor 430 determines whether a write command is received through the host interface 480 (S1101).

When the write command is received as a result of the determination in step 1101 (S1101), the processor 430 converts the LBA designated by the write command into the physical address of the disk 12 (S1102).

When the virtual zone is set, the LBA designated by the write command can be converted into the physical address of the disk 12 by performing the same process as in steps 501 (S501) to 506 (S506) shown in FIG. . If the virtual zone is not set, the process of steps 501 (S501) to 506 (S506) shown in FIG. 26 is performed to convert the LBA designated by the write command to the physical address of the disk 12. You can.

Next, the processor 430 generates a driving signal for moving the magnetic head 16 to the physical address position of the converted disk 12 (S1103). In detail, the processor 430 generates a voice coil motor driving control signal for moving the magnetic head 16 to the position of the disk 12 according to the converted CHS information. In this way, the magnetic head 16 can be moved to the target track position of the disc in accordance with the generated voice coil motor drive control signal.

The processor 430 controls the disk drive to write data at a position corresponding to the CHS information of the disk 12 (S1104).

Next, a garbage collection process for arranging invalid data in a virtual band according to an embodiment of the present invention will be described with reference to FIG. 29.

The garbage collection process may be executed under the control of the processor 110 shown in FIGS. 1A and 1B or the processor 430 shown in FIGS. 4A and 4B. For convenience of description, the description will be limited to that performed by the processor 110.

As an example, the garbage collection process can design the storage device to run in an idle mode. Here, the idle mode refers to a mode in which power consumption of the storage device is reduced when a new command is not received for a predetermined time after performing a command in the storage device.

The processor 110 selects a physical zone or a virtual zone to perform a garbage collection process (S1201). As an example, the processor 110 may select a zone based on the number of invalid sectors using the mapping table. That is, the physical zone or the virtual zone may be selected in order of increasing number of invalid virtual addresses. Here, the number of invalid virtual addresses is the same as the number of sectors to which invalidated data is written.

When the physical zone or the virtual zone is selected, the processor 110 uses the mapping table 470-1 to determine the number of invalidated virtual addresses among the virtual bands included in the selected physical zone or virtual zone. It is determined whether there is an excess virtual band (S1202).

As a result of the determination in step 1202 (S1202), if there is a virtual band in which the number of invalidated virtual addresses exceeds the threshold TH, the processor 110 determines that the number of invalidated virtual addresses exceeds the threshold TH. A new virtual band is allocated to the mapped logical band corresponding to the band (S1203).

For example, the number of invalidated virtual addresses in the virtual band VB_M shown in FIG. 32 is six. If the threshold TH is set to 5, the virtual band VB_M shown in FIG. 32 corresponds to a virtual band exceeding the threshold. Therefore, in this case, a new virtual band VB_N is allocated.

Next, the processor 110 rewrites data written to a valid virtual address in the previously allocated virtual band VB_M to a sector corresponding to the virtual address allocated in the new virtual band (S1204).

That is, as shown in FIG. 32, the data written on the basis of the virtual address validly allocated in the previously allocated virtual band VB_M is returned to the sector corresponding to the virtual address allocated in the new virtual band VB_N. Write is executed. 32 shows an example of rewriting in the order of LBA in the newly allocated virtual band (VB_N).

Next, the processor 1100 updates the mapping table (S1205). That is, the mapping information allocated in the previous virtual band VB_M where the garbage collection process is performed is deleted from the mapping table, and the mapping information for the new allocated virtual band VB_N is added to the mapping table 470-1.

Next, a method of performing virtual zone configuration and virtual band size adjustment processing for a storage medium through a network according to an embodiment of the present invention will be described.

First, a network system in which a method for adjusting a parameter value related to a virtual zone configuration or a virtual band size adjustment process for a storage device through a network is performed will be described with reference to FIG. 33.

As shown in FIG. 33, a network system according to an embodiment of the inventive concept includes a program providing terminal 310, a network 320, a host PC 330, and a storage device 340.

The network 320 may be implemented as a communication network such as the Internet. Of course, it may be implemented as a wireless communication network as well as a wired communication network.

The program providing terminal 310 stores a parameter adjusting program for adjusting the configuration of the virtual zone and the size of the virtual band used to execute the storage medium access according to the spirit of the present invention shown in FIGS. 17 to 29. .

The program providing terminal 310 performs a process of transmitting a parameter adjusting program to the host PC 330 according to a program transmission request from the host PC 330 connected through the network 320.

After accessing the parameter adjusting program providing terminal 310 through the network 320, the host PC 330 requests the transmission of the parameter adjusting program and downloads the requested parameter adjusting program from the program providing terminal 310. It has hardware and software that can be used.

In addition, the host PC 330 uses the parameter adjusting program downloaded from the program providing terminal 310 to configure the virtual zone and the size of the virtual band based on the method shown in FIGS. 17 to 29. It is possible to execute the parameter adjusting method for adjusting the in the storage device 340.

Then, referring to the flowchart of FIG. 34, a method of performing parameter adjustment processing of a storage device for adjusting a virtual zone configuration and a virtual band size for a storage medium through a network according to an embodiment of the inventive concept. Let's explain.

First, the host PC 330 using the storage device 340 such as a disk drive is connected to the program providing terminal 310 via the network 320 (S1301).

After accessing the program providing terminal 310, the host PC 330 transmits information to the program providing terminal 310 requesting transmission of a parameter adjusting program related to virtual zone configuration and virtual band size adjustment (S1302).

Then, the program providing terminal 310 transmits the requested parameter adjusting program to the host PC 330, so that the host PC 330 downloads the parameter adjusting program related to the virtual zone configuration and the virtual band size adjustment (S1303).

Then, the host PC 330 processes to execute the downloaded parameter adjusting program in the storage device (S1304). A first parameter value for determining the size of the virtual zones such that a plurality of physical zones of a storage medium are integrated into a single virtual zone or a single physical zone is divided into a plurality of virtual zones by executing a parameter adjusting program in the storage device. The second parameter value that determines the size of the plurality of virtual bands that are adjusted or allocated per physical zone of the storage medium is adjusted.

Accordingly, as illustrated in FIG. 15 or 16, the plurality of physical zones are combined into one virtual zone by using the adjusted first parameter value, or one physical zone is divided into a plurality of virtual zones. can do. 11 (A), (B), and (C), the size of the virtual band is set equal to the size of the logical band using the adjusted second parameter value, or the virtual band size is reduced. Can be extended or extended.

The mapping table is changed based on the virtual zone configuration and the sized virtual band performed as described above (S1305). That is, a virtual band is allocated to a logical band by using virtual bands allocated for each virtual zone, new virtual bands are newly configured based on the resized virtual band, and a virtual corresponding to the LBA based on the newly configured virtual bands. Change the mapping table so that addresses can be assigned.

Through the above operation, the virtual zone configuration and the virtual band size of the storage medium of the storage device accessed using the virtual address through a wired or wireless network can be adjusted.

The invention can be practiced as a method, apparatus, system, or the like. When implemented in software, the constituent means of the present invention are code segments that necessarily perform the necessary work. The program or code segments may be stored in a processor readable medium. Examples of processor-readable media include electronic circuits, semiconductor memory devices, ROMs, flash memory, erasable ROM (EROM), floppy disks, optical disks, hard disks, and the like.

Specific embodiments shown and described in the accompanying drawings are only to be understood as examples of the present invention, and not to limit the scope of the present invention, even in the scope of the technical spirit described in the present invention in the technical field to which the present invention belongs As various other changes may occur, it is obvious that the invention is not limited to the specific constructions and arrangements shown or described.

1000A, 1000B; Storage device, 2000; Host device, 3000; Connector 110; Processor, 120; ROM, 130; RAM, 140; A storage medium interface, 150; Storage medium, 160; Host interface 170; Bus, 410; Preamplifier, 420; Lead / light channel, 430; Processor 440; Voice coil motor driver 450; Spindle motor drive 460; ROM, 470; RAM, 480; Host interface, 430-1; Virtual band size adjusting unit 430-2; A virtual zone setting unit 430-3; Address translation processor, 430-3A; First processor, 430-3B; Second processor, 430-3C; Third processor, 131; Pre cue, 132; Allocation queue, 133; Garbage queue, 310; A program providing terminal 320; Network, 330; Host PC, 340; Hard disk drive.

Claims (65)

Mapping a physical zone of a storage medium to a virtual zone; And
Accessing the storage medium based on the virtual zone,
The virtual zone maps to correspond to a plurality of physical zones or to a part of a single physical zone. The method of claim 1, wherein a plurality of virtual bands are allocated for each physical zone of the storage medium. The storage of claim 2, wherein the number of virtual bands allocated for each physical zone of the storage medium is set to be greater than the number of logical bands classified based on logical block addresses allocated for each physical zone of the storage medium. Medium access method. 4. The method of claim 3, wherein the logical band is classified into a set of logical block addresses in a first size unit. 4. The method of claim 3, wherein the logical band is classified into a set of contiguous logical block addresses in a first size unit. The method of claim 3, wherein the virtual band is classified into physical storage spaces of the storage medium in a second size unit. 4. The method of claim 3, wherein the storage medium comprises a disk, and wherein the virtual band is classified into a set of second size units for tracks of the disk. 4. The method of claim 3, wherein the storage medium comprises a disc and the virtual band is classified into a set of second size units for consecutive tracks of the disc. The method of claim 1, wherein accessing the storage medium is
Allocating a virtual band included in a virtual zone corresponding to the logical band to a logical band including a logical block address designated by a command;
Determining a physical location of a storage medium to access based on the assigned virtual bands; And
Accessing the determined physical location of the storage medium;
The logical band is classified into a set of logical block addresses in a first size unit, and the virtual band is classified into a second size unit in a physical storage space of the storage medium. 10. The method of claim 9, wherein the command comprises a write command. 10. The method of claim 9, wherein assigning the virtual bands
When there is no virtual band allocated to the logical band including the logical block address specified by the command, a new virtual band is allocated which is not allocated to another logical band among the virtual bands included in the virtual zone. A storage medium access method, characterized in that. 10. The method of claim 9, wherein assigning the virtual bands
In the virtual band allocated to the logical band including the logical block address specified by the command, when no virtual address remains assigned to the logical block address, the virtual band is allocated to another logical band among the virtual bands included in the virtual zone. A storage medium access method comprising allocating a new virtual band that is not present. 10. The method of claim 9, wherein assigning the virtual bands
If there is a virtual band not allocated to another logical band among the virtual bands included in the physical zone corresponding to the logical band including the logical block address specified by the command, the virtual band not allocated to the other logical band Assigning a to a logical band including a logical block address specified in the command; And
If there is no virtual band allocated to another logical band among the virtual bands included in the physical zone corresponding to the logical band including the logical block address specified by the command, the virtual band is included in another physical zone of the virtual zone. And assigning a virtual band that is not assigned to another logical band to a logical band including a logical block address specified in the command. 10. The method of claim 9, wherein determining the physical location of the storage medium to access
Allocating a virtual address corresponding to the logical block address specified in the command from the allocated virtual band; And
Converting the assigned virtual address into physical location information of the storage medium. 15. The method of claim 14, wherein the previously allocated virtual address is invalidated when the virtual address corresponding to the logical block address specified by the command has been previously assigned in the virtual band. The storage medium of claim 1, wherein the storage medium is accessed by converting a logical block address specified in a command into a virtual address so that data is sequentially written in one direction in the storage medium based on the virtual zone. Medium access method. The storage device of claim 1, wherein a plurality of virtual bands are allocated to each physical zone of the storage medium, and the data is sequentially written in an inner circumferential direction or an outer circumferential direction in a physical area of the storage medium corresponding to the virtual band. A method of accessing a storage medium, comprising accessing the medium. The method of claim 1, wherein accessing the storage medium is
Retrieving a virtual address to access using a mapping table based on a virtual band allocated to a logical band for each virtual zone; And
Accessing a location of the storage medium corresponding to the retrieved virtual address. The method of claim 1, further comprising adjusting a size of virtual bands that classify physical storage spaces of the storage medium included in the virtual zone. Combining the plurality of physical zones of the storage medium into a single virtual zone or dividing a single physical zone into a plurality of virtual zones; And
Accessing the storage medium based on the virtual zone. 21. The method of claim 20, wherein accessing the storage medium is
Allocating a virtual band included in a virtual zone corresponding to the logical band to a logical band including a logical block address designated by a command;
Determining a physical location of a storage medium to access based on the assigned virtual bands; And
Accessing the determined physical location of the storage medium;
The logical band is classified into a set of logical block addresses in a first size unit, and the virtual band is classified into a second size unit in a physical storage space of the storage medium. The method of claim 21, wherein assigning the virtual band is
When there is no virtual band allocated to the logical band including the logical block address specified by the command, a new virtual band is allocated which is not allocated to another logical band among the virtual bands included in the virtual zone. A storage medium access method, characterized in that. The method of claim 21, wherein assigning the virtual band is
In the virtual band allocated to the logical band including the logical block address specified by the command, when no virtual address remains assigned to the logical block address, the virtual band is allocated to another logical band among the virtual bands included in the virtual zone. A storage medium access method comprising allocating a new virtual band that is not present. Mapping a physical storage space of the storage medium into a virtual band; And
Accessing the storage medium based on the virtual band,
The size of the physical storage space of the storage medium corresponding to each virtual band is adjusted according to an initially set command. 25. The method of claim 24, wherein accessing the storage medium comprises accessing the storage medium based on a virtual band assigned to a logical band including a logical block address specified by a command. 27. The method of claim 25, wherein one or more virtual bands are assigned to a logical band that includes a logical block address specified by the command. 25. The method of claim 24, wherein the size of the virtual band is adjusted to be larger or smaller than the size of the logical band. 25. The method of claim 24, wherein the size of the virtual band is adjusted to be equal to the size of the logical band. 25. The method of claim 24, wherein the size of the virtual band is adjusted for each physical zone of the storage medium according to an initially set command. 25. The method of claim 24, wherein accessing the storage medium is
Allocating the virtual band to a logical band including a logical block address specified by a command;
Allocating a virtual address corresponding to a logical block address designated by the command based on the allocated virtual band; And
Accessing the location of the storage medium corresponding to the assigned virtual address. 31. The method of claim 30, wherein the command comprises a write command. 31. The method of claim 30, wherein the step of assigning the virtual band is a new virtual band that is not allocated to another logical band when there is no virtual band allocated to the logical band including the logical block address specified by the command. Allocating a storage medium, characterized in that for assigning. 31. The method of claim 30, wherein the step of allocating the virtual band is performed when the virtual address that is not assigned to the logical block address remains in the virtual band allocated to the logical band including the logical block address specified by the command. Allocating a new virtual band that is not assigned to a band. 31. The method of claim 30, wherein the command includes a write command and invalidates a previously allocated virtual address when a virtual address corresponding to a logical block address designated by the write command has been previously allocated in the virtual band. Storage medium access method characterized in that. 25. The method of claim 24, further comprising selecting only data written to a valid virtual address of the virtual band and rewriting based on the newly allocated virtual band. The storage device of claim 24, wherein a plurality of virtual bands are allocated to each physical zone of the storage medium, and the data is sequentially written in an inner circumferential direction or an outer circumferential direction in a physical area of the storage medium corresponding to the virtual band. A method of accessing a storage medium, comprising accessing the medium. 25. The method of claim 24, wherein accessing the storage medium is
Retrieving a virtual address to access using a mapping table based on the virtual band assigned to the logical band; And
Accessing a location of the storage medium corresponding to the retrieved virtual address. 38. The method of claim 37, wherein the mapping table includes at least logical band, virtual band, and virtual address information last accessed for each virtual band corresponding to the logical block address. Adjusting a size of a virtual band classifying physical storage space of the storage medium; And
Accessing the storage medium based on the resized virtual band. 40. The method of claim 39, wherein accessing the storage medium is
Allocating the virtual band to a logical band including a logical block address specified by a command;
Allocating a virtual address corresponding to a logical block address designated by the command based on the allocated virtual band; And
Accessing the location of the storage medium corresponding to the assigned virtual address. 41. The method of claim 40, wherein the step of allocating the virtual band comprises: a new virtual band not allocated to another logical band when there is no virtual band allocated to the logical band including the logical block address specified by the command. Allocating a storage medium, characterized in that for assigning. 41. The method of claim 40, wherein the step of assigning the virtual band is based on another logical when no virtual address remains assigned to the logical block address in the virtual band allocated to the logical band including the logical block address specified by the command. Allocating a new virtual band that is not assigned to a band. Converting a logical block address specified in a write command into a physical address of the disk by using a virtual zone and a virtual band corresponding to a physical area of the disk;
Generating a drive signal for moving the magnetic head to the physical address position of the converted disk; And
Performing a data write at a physical address position of a disk to which a magnetic head is moved according to the driving signal;
And a plurality of physical zones of the disk are integrated into a single virtual zone or a single physical zone is divided into a plurality of virtual zones according to an initial set first command. 44. The virtual band of claim 43, wherein the virtual band has a structure in which a plurality of logical bands are allocated to the virtual zone, and a virtual band included in the virtual zone corresponding to the logical band in a logical band including a logical block address specified in a received write command. And a data write method. 44. The method of claim 43, wherein the size of the virtual band is adjusted according to an initially set second command. 45. The method of claim 43, further comprising converting a logical block address specified by a write command into a physical address of the disk so that data is sequentially written in either the inner circumferential direction or the outer circumferential direction of the disk based on the virtual zone and the virtual band. And a data writing method. 44. The method of claim 43, wherein converting to a physical address of the disk
Allocating a virtual band included in a virtual zone corresponding to the logical band to a logical band including a logical block address designated by the write command;
Converting a logical block address specified in the write command into a virtual address based on the allocated virtual band; And
And converting the translated virtual address into the physical address. 48. The method of claim 47, wherein assigning the virtual bands comprises
When there is no virtual band allocated to the logical band including the logical block address specified by the write command, a new virtual band is allocated among the virtual bands included in the virtual zone that is not allocated to another logical band. Data writing method characterized in that. 48. The method of claim 47, wherein assigning the virtual bands comprises
In the virtual band allocated to the logical band including the logical block address specified by the write command, when no virtual address remains assigned to the logical block address, a different logical band is included among the virtual bands included in the virtual zone. A method of writing data, comprising allocating a new virtual band that has not been allocated. 48. The method of claim 47, wherein assigning the virtual bands comprises
If there is a virtual band not allocated to another logical band among the virtual bands included in the physical zone corresponding to the logical band including the logical block address specified by the write command, the virtual band not allocated to the other logical band Allocating a band to a logical band including a logical block address specified in the write command; And
If there is no virtual band allocated to another logical band among the virtual bands included in the physical zone corresponding to the logical band including the logical block address specified by the write command, the virtual band is not included in the other physical zone of the virtual zone. And assigning a virtual band not allocated to another logical band included to a logical band including a logical block address specified in the write command. 48. The method of claim 47, wherein the logical block address specified by the write command is converted into an unassigned virtual address in the allocated virtual band, and a virtual address corresponding to the logical block address specified by the write command already exists. Invalidating a virtual address already present in the data writing method. 44. The method of claim 43, further comprising selecting only data written to a valid virtual address of the virtual band and rewriting based on the newly allocated virtual band. A storage medium for storing data;
A storage medium interface for accessing the storage medium to write or read data; And
A processor for controlling the storage medium interface to write data to or read data from the storage medium,
The processor may be configured to consolidate a plurality of physical zones of a storage medium into a single virtual zone or to set a virtual zone to divide a single physical zone into a plurality of virtual zones, and access the storage medium based on the virtual zone. A storage device, characterized by controlling a storage medium interface. 54. The storage device of claim 53, wherein the processor adjusts sizes of the plurality of virtual bands allocated for each physical zone of the storage medium according to a command received. 54. The storage device of claim 53, wherein the processor translates a logical block address specified in a command received using the virtual zone into a physical address of the storage medium. 54. The method of claim 53, wherein the processor converts a logical block address specified in a write command into a physical address of the storage medium so that data is sequentially written in one direction in the storage medium using the virtual zone. Storage device. 54. The processor of claim 53 wherein the processor is
A first processor for extracting a logical block address specified in a received command;
A second processor for converting the extracted logical block address into a virtual address based on the virtual zone; And
And a third processor that translates the translated virtual address into a physical address of the storage medium and controls the storage medium interface to access the storage medium according to the converted physical address. 59. The system of claim 57, wherein said second processor is
Allocating a virtual band included in a virtual zone corresponding to the logical band to a logical band including the extracted logical block address and converting the extracted logical block address into a virtual address based on the allocated virtual band Storage device characterized in that performing a process. 58. The method of claim 57, wherein the second processor allocates to another logical band among the virtual bands included in the virtual zone when there is no virtual band allocated to the logical band including the extracted logical block address. Storage device, characterized in that the new virtual band is not assigned. 58. The method of claim 57, wherein the second processor is further configured to select one of the virtual bands included in the virtual zone when a virtual band in which a writeable address does not remain is allocated to the logical band including the extracted logical block address. Allocating a new virtual band that is not assigned to a logical band. 59. The virtual processor of claim 57, wherein the second processor does not have a virtual band not assigned to another logical band among virtual bands included in a physical zone corresponding to a logical band including a logical block address specified by the write command. And allocating a virtual band included in another physical zone of the virtual zone and not allocated to another logical band to a logical band including a logical block address specified in the received command. A host device for issuing a command to operate a connected storage device; And
A storage device that writes data transmitted from the host device to a storage medium based on a command issued by the host device, or reads data from the storage medium and transmits the data to the host device;
The storage device sets a virtual zone to consolidate a plurality of physical zones of a storage medium into a single virtual zone or to divide a single physical zone into a plurality of virtual zones according to a first command received from the host device. And access the storage medium based on a virtual zone. 63. The computer system of claim 62, wherein the storage device adjusts the size of the plurality of virtual bands allocated for each physical zone of the storage medium according to a second command received from the host device. Downloading a parameter adjusting program for a storage device from a terminal connected to a network; And
Executing a parameter adjusting program for the downloaded storage device;
The parameter adjusting program for the storage device determines the size of the virtual zones such that the plurality of physical zones of the storage medium constituting the storage device are integrated into a single virtual zone or a single physical zone is divided into a plurality of virtual zones. A code for performing a task of adjusting a first parameter value or a parameter adjusting program for the storage device performs a task of adjusting a second parameter value for determining sizes of a plurality of virtual bands allocated for each physical zone of the storage medium. And a code for controlling the parameter of the storage device. 65. A computer readable storage medium having recorded thereon program code for executing the method of any one of claims 1 to 52 or 64.

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