JP2011141645A - Information processing apparatus, method and program for processing access - Google Patents

Abstract

The writing time for an information storage device can be shortened.
An information recording apparatus 21 stores the number of sectors included in each block, manages a file in units of clusters each associated with a plurality of sectors, and manages one or more files to be written. The number of sectors included in each block is acquired from the file system processing unit 13b that designates writing a plurality of consecutive sectors corresponding to the cluster as a write target and the information recording device 21, and the number of sectors included in each acquired block is acquired. And a driver processing unit 13c for writing data to the information storage device 21 for a plurality of sectors belonging to the same block in a plurality of consecutive sectors designated for writing at the same writing timing. Constitute.
[Selection] Figure 2

Description

  The present invention relates to an information processing apparatus for accessing an information storage device capable of erasing data in units of blocks each including a plurality of sectors as minimum access units.

  For example, an information processing device such as a PC (Personal Computer) reads desired data from an information storage device such as a hard disk or a flash memory, or writes desired data to the information storage device. Among such information processing apparatuses, for example, there is one in which a file system is constructed so that a user can handle data stored in an information storage device as a file. In this file system, data is managed in a predetermined unit (allocation unit). For example, in a FAT (File Allocation Table) file system, an information processing apparatus and an information storage are stored in units of clusters as an example of an allocation unit. Data access to and from the device is performed. A cluster is associated with a plurality of sectors which are the minimum access unit of the information storage device.

  Since the speed of data access between the information storage device and the information processing device affects the processing time in the information processing device, it is required to be as fast as possible. For example, in Patent Document 1, a plurality of cluster sizes are provided in the same partition of a hard disk, and according to the size of data to be stored, data is stored in a cluster corresponding to the size of the data, thereby A technique that can eliminate waste and keep the access speed optimal is disclosed. Patent Document 2 discloses a technique for searching for a continuous free cluster group on a recording medium and continuously writing desired data in a data storage area of the free cluster group. Patent Document 3 discloses a technique for detecting an empty area in a block unit in which a plurality of minimum recording units of a recording medium are continuously arranged and recording an information signal in the empty area in a block unit.

JP 2000-357112 A JP 2002-91806 A JP 2004-86823 A

According to the techniques disclosed in Patent Documents 1 to 3, the data access time can be shortened. However, since writing to the information storage device is performed with reference to the cluster in the file system, it may not necessarily be effective depending on the configuration of the information storage device.
For example, when the information storage device is a flash memory such as an SD card, the following is appropriate depending on the relationship between a plurality of sectors corresponding to a cluster in the file system and a block that is a minimum erase unit in the flash memory. There is a risk that correct writing cannot be performed.
As shown in FIG. 1A, a plurality of sectors associated with each cluster (cluster A, cluster A + 1, cluster A + 2) of the file system are divided into blocks (block B, block B + 1, block B + 2) in the flash memory. ), The sector data managed by each cluster can be written to the block by writing the data for each block. It is only necessary to erase the data and sequentially write the target data to the block.
However, as shown in FIG. 1B, when a plurality of sectors corresponding to each cluster in the file system spans a plurality of blocks, the data managed by each cluster (for example, cluster C) is made into a block. When writing, two blocks (block D, block D + 1) must be written, two blocks must be erased, and data must be written to these blocks, Subsequently, when data to be managed in the next cluster (cluster C + 1) is written to the block, writing must be performed for two blocks (blocks D + 1 and D + 2), and data is erased for the two blocks. To write data to these blocks. In this way, a plurality of blocks must be erased. Further, when writing a continuous cluster, the same block must be erased a plurality of times, and data can be erased. Writing becomes slow.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a technique capable of shortening the writing time to the information storage device.

  To achieve the above object, an information processing apparatus according to the first aspect of the present invention accesses an information storage device capable of erasing data in units of blocks each including a plurality of sectors as minimum access units. In the apparatus, the information recording apparatus stores the number of sectors included in each block, and obtains a file in units of clusters in which a plurality of sectors are associated with an acquisition unit that acquires the number of sectors included in each block from the information recording apparatus. Based on the number of sectors included in each acquired block, and file management means for specifying a plurality of consecutive sectors corresponding to one or more clusters that manage files to be written as write targets Write data to the information storage device for a plurality of sectors belonging to the same block in a plurality of consecutive sectors designated for writing. If all the sectors are not specified for writing in the block corresponding to one or more sectors at the end of the consecutive sectors specified for writing, the data of the sector specified for writing is stored. When all sectors in the block are aligned by the sector specified for writing by the file management means and the next writing specified by the file management means, the data cached in the storage means and the next writing specified Write control means for writing data to one or more blocks including the block using sector data.

  According to such an information processing apparatus, data writing to a plurality of sectors belonging to the same block of the information storage device has the same timing (not different writing timings), so the data erasure of the block that occurs at the time of writing to the block The number of times can be reduced. For this reason, writing of data to the information processing apparatus becomes faster and writing time is shortened. In addition, when the first write-designated sector and the next write-designated sector belong to the same block, they are written together in the same block, so the number of times of writing to the block can be reduced. In addition, the number of times of data erasure of the block that occurs at the time of writing can be reduced. For this reason, writing of data to the information processing apparatus becomes faster and writing time is shortened.

  Further, in the information processing apparatus, when all sectors of the block are not aligned due to the next sector designated for writing by the file management unit, the block is included using the data cached in the storage unit. Data may be written to one or more blocks. According to such an information processing apparatus, when writing to the same block is not performed, the cached data can be appropriately written into the information processing apparatus.

  In the information processing apparatus, the write control unit may write data to the information storage device in units of a plurality of blocks. According to such an information processing apparatus, since a plurality of blocks are collectively written in the information storage device, the number of times of writing can be reduced, and writing of data into the information storage device is accelerated.

  The information processing apparatus further includes actual measurement determination means for actually writing data to the information storage device in units of different blocks, and determining the number of blocks that is the fastest when written, The write control means may write data to the information storage device in units of the determined number of blocks. According to the information processing apparatus, since it is possible to actually measure and determine the fastest writing unit in writing to the information storage device, data can be written with an appropriate number of blocks. Writing data to the storage device can be made faster.

  In order to achieve the above object, the access processing method according to the second aspect of the present invention accesses an information storage device capable of erasing data in units of blocks including a plurality of sectors as minimum access units. In the access processing method by the information processing apparatus, the information recording apparatus stores the number of sectors included in each block, and the acquisition unit of the information processing apparatus acquires the number of sectors included in each block from the information recording apparatus; The file management unit of the information processing apparatus manages a file in units of clusters including a plurality of sectors, and manages a plurality of consecutive sectors corresponding to one or more clusters that manage a file to be written. A file management step for designating writing as a write control unit of the information processing device, and a plurality of consecutive sectors designated for writing Write data to a plurality of sectors belonging to one block to the information storage device at the same write timing, and all the blocks corresponding to one or more sectors at the end of consecutive sectors designated for writing are all When the sector is not designated for writing, the data of the sector designated for writing is cached in a predetermined storage means, and all sectors of the block are aligned by the sector designated for writing next by the file management means And a write control step of writing data to one or more blocks including the block using the data cached in the storage means and the data of the sector designated to be written next. According to such an access processing method, data writing to a plurality of sectors belonging to the same block of the information storage device does not have different write timings, so that the number of times of block data erasure that occurs when writing to the block can be reduced. . For this reason, writing of data to the information processing apparatus becomes faster, and writing time is shortened. In addition, when the first write-designated sector and the next write-designated sector belong to the same block, they are written together in the same block, so the number of times of writing to the block can be reduced. In addition, the number of times of data erasure of the block that occurs at the time of writing can be reduced. For this reason, writing of data to the information processing apparatus becomes faster and writing time is shortened.

  In order to achieve the above object, an access processing program according to the third aspect of the present invention accesses an information storage device capable of erasing data in units of blocks each including a plurality of sectors as minimum access units. An access processing program to be executed by a computer, wherein the information recording device stores the number of sectors included in each block, and the acquisition means for acquiring the number of sectors included in each block from the information recording device; File management means for managing a file in units of clusters including sectors, and specifying a plurality of consecutive sectors corresponding to one or more clusters for managing a file to be written as a writing target Based on the number of sectors included in each block, the same block in multiple consecutive sectors specified for writing Write data to a plurality of sectors to the information storage device at the same write timing, and all sectors are designated for writing in blocks corresponding to one or more sectors at the end of consecutive designated sectors. If not, the data of the sector designated for writing is cached in a predetermined storage means, and when all sectors of the block are aligned by the sector designated for writing next by the file management means, the storage means Using the data cached and the data of the sector designated to be written next, it is made to function as a writing control means for writing data to one or more blocks including the block. According to a computer that executes such an access processing program, data writing to a plurality of sectors belonging to the same block of the information storage device does not have different write timings, so the number of times of block data erasure that occurs when writing to the block is reduced. can do. For this reason, writing of data to the information processing apparatus becomes faster, and writing time is shortened. In addition, when the first write-designated sector and the next write-designated sector belong to the same block, they are written together in the same block, so the number of times of writing to the block can be reduced. In addition, the number of times of data erasure of the block that occurs at the time of writing can be reduced. For this reason, writing of data to the information processing apparatus becomes faster and writing time is shortened.

It is a figure explaining writing of the file with respect to the information storage device which concerns on a prior art example. It is a figure which shows an example of the information processing apparatus which concerns on one Embodiment of this invention, and an information storage device. It is a figure explaining an example of the writing of the file with respect to the information storage device which concerns on one Embodiment of this invention. It is a flowchart of the optimal writing unit determination process which concerns on one Embodiment of this invention. It is a flowchart of the access process by the information processing apparatus which concerns on one Embodiment of this invention.

  Embodiments of the present invention will be described with reference to the drawings. The embodiments described below do not limit the invention according to the claims, and all the elements and combinations described in the embodiments are essential for the solution of the invention. Is not limited.

  First, an information processing apparatus according to an embodiment of the present invention will be described.

  FIG. 2 is a diagram illustrating an example of an information processing device and an information storage device according to an embodiment of the present invention.

  The information processing device 2 is, for example, a PC (Personal Computer), and includes a device main body 10, a display device 11, and an input device 12. The display device 11 is a device that displays an image, such as a liquid crystal display or a CRT display. The input device 12 is a device for receiving input from a user of the information processing device 2 such as a mouse and a keyboard.

  In the apparatus main body 10, a CPU (Central Processing Unit) 13, a ROM (Read Only Memory) 14, a RAM (Random Access Memory) 15 as an example of a storage unit, a hard disk drive (HDD) 16, and a display processing unit 17. The input interface unit 18 and the interface unit 19 are connected via a bus 20.

  The ROM 14 stores a basic program such as a boot program. The RAM 15 is used as an area for storing programs and data, or as a work area for storing data used for processing by the CPU 13. In the present embodiment, the RAM 15 is also used for caching at least a part of file data. The RAM 15 is also used as an area from which file management information (to be described later) stored in the information storage device 21 is read out. The HDD 16 stores various programs such as an OS (Operating System) program, an application program, and a driver program in a readable manner. Further, the HDD 16 stores the identification information (ID) of the information storage device 21 connected to the information processing device 2 and the optimum writing unit (optimum writing unit) for the information storage device 21 in association with each other.

  The display processing unit 17 generates display data or a signal for displaying an image on the display device 11 under the control of the CPU 13 and outputs the display data or signal to the display device 11. The input interface unit 18 is connected to the input device 12 and passes a signal from the input device 12 to the CPU 13 as data. The interface unit 19 can be connected to a plurality of types of information storage devices 21, reads data and programs from the plurality of types of information storage devices 21, and writes data to the information storage devices 21. Examples of the information recording device 21 include a flash memory (for example, an SD card, a USB memory, etc.).

  The information recording device 21 has a plurality of sectors as minimum data access units. Further, the information recording device 21 has a plurality of blocks as minimum units for erasing data. The block includes a predetermined number of sectors. The information recording device 21 stores information related to the information recording device 21 such as the number of sectors included in the block. Further, the information recording device 21 stores file management information (for example, FAT (File Allocation Table)) necessary for managing the data of the file stored in the information recording device 21. The file management information includes information indicating the correspondence between the file and the cluster that manages the file, and the correspondence between the cluster and a plurality of sectors of the information storage device 21 that stores data of the cluster. And is used for a file system processing unit 13b described later of the information processing apparatus 2.

  CPU13 controls operation | movement of each part 14-19. The CPU 13 executes various processes by reading the basic program in the ROM 14, the OS program, the application program, the driver program, and the like stored in the HDD 16 into the RAM 15 and executing them.

  The CPU 13 includes an application processing unit 13a, a file system processing unit 13b as an example of a file management unit, an acquisition unit, an actual measurement determination unit, and a driver processing unit 13c as an example of a writing control unit. The application processing unit 13a is constructed by the CPU 13 executing the application program, the file system processing unit 13b is constructed by the CPU 13 executing the OS program, and the driver processing unit 13c is configured by the CPU 13 executing the driver program. Is built by

  The application processing unit 13a causes an application screen (not shown) to be displayed on the display device 11 by the display processing unit 17, and provides, for example, a document creation / editing function and an image creation / editing function. In addition, the application processing unit 13a exchanges access requests (read requests, write requests) for various files related to processing, data of corresponding files, and the like with the file system processing unit 13b. When receiving a file write request from the user via the input device 12, the application processing unit 13a notifies the file system processing unit 13b of a write request for the file.

  The file system processing unit 13b performs file management using the file management information read to the RAM 15. For example, when the file system processing unit 13 receives a file access request (read request or write request) from the application processing unit 13 a, the file system information storage device 21 stores the file based on the file management information stored in the RAM 15. The storage position (several sectors) is specified (assigned or detected), and an access request (write designation or read designation) designating access to the storage position (several sectors) is passed to the driver processing unit 13c. Data related to the access request is exchanged with the driver processing unit 13c.

  The driver processing unit 13c accesses the plurality of sectors of the information storage device 21 specified by the access request received from the file system processing unit 13b via the interface unit 19 in accordance with the optimum writing unit determined as described later. Execute. For example, when writing data, the driver processing unit 13c saves the data of one or more blocks to which one or more sectors to be written belong to the RAM 15, erases the data of the blocks, A series of write operations are performed in which updated data is generated based on data to be written in one or more sectors to be written, and this data is written to the corresponding block.

  Further, the driver processing unit 13c detects whether or not the information storage device 21 is newly connected to the interface unit 19, and if it is detected that the information storage device 21 is newly connected, the optimum writing to the information storage device 21 is performed. It is determined whether the unit is stored in the HDD 16 or not. For example, the ID of the information storage device 21 is received from the information storage device 21, and it is determined whether or not the optimum writing unit corresponding to the ID is stored in the HDD 16. When the optimum writing unit corresponding to the ID is stored in the HDD 16, the driver processing unit 13c determines (sets) the optimum writing unit as a writing unit for accessing the information storage device 21. To do.

  Further, when the optimum writing unit corresponding to the ID is not stored in the HDD 16, the driver processing unit 13c actually accesses the information storage device 21 by a plurality of writing units and relates to data transfer at the time of the access. Measure the value (data transfer value). Here, the data transfer value may be a data transfer rate indicating a data transfer amount with respect to time, or may be a time required to transfer a predetermined data amount, and the transfer rates are compared. Any value can be used. As the plurality of writing units, if the information storage device 21 is a flash memory, for example, a plurality of writing units that are n times as many as the block of the flash memory (n is an integer of 1 or more) may be prepared.

  In addition, the driver processing unit 13c detects the optimum writing unit based on the actually measured data transfer value, determines that the optimum writing unit is used for access to the information storage device 21, and uses the optimum writing unit. And the ID of the information storage device 21 are stored in the HDD 16 in association with each other. Thereby, when the same information storage device 21 is connected, the optimum writing unit can be quickly grasped and used without performing actual measurement.

  In addition, the driver processing unit 13 c acquires the number of sectors included in the block from the information storage device 21. In the information storage device 21, the blocks are usually formed in blocks corresponding to the number of sectors in order from the head sector. Therefore, the sectors included in each block can be grasped based on the number of sectors included in the block.

  Further, the driver processing unit 13c writes data to a plurality of sectors belonging to the same block in a plurality of consecutive sectors designated by the file system processing unit 13b based on the number of sectors included in the acquired block. The data is written to the information storage device 21 so as to be at the same timing (not to be at different writing timings). Specifically, the driver processing unit 13c causes a plurality of sectors belonging to the same block in a plurality of consecutive sectors to be continuously written in the information storage device 21 by one writing. At this time, the write unit of data continuously sent by one write is set to the optimum write unit (n blocks) that has already been determined.

  Further, the driver processing unit 13c determines that the last sector designated for writing is not the last sector of the last optimum writing unit when the designated sector is divided for each optimum writing unit, that is, the last sector. When the optimum writing unit for writing the data cannot be filled with the sector designated for writing, the data of the sector to be written in the optimum writing unit is cached in the RAM 15.

  The driver processing unit 13c determines whether or not the data of the sector including one or more sectors at the last part designated for writing is cached in the RAM 15, and if it is cached, it is cached. It is determined whether the last sector and the first sector of the current write-designated data are consecutive sectors. As a result, when the sector designated for writing this time is a continuous sector, the driver processing unit 13c caches the sector because the sector and the last sector being cached belong to the same block. The data of one or more sectors and the data of one or more sectors belonging to the same block at the head of the writing designation are continuously written to the information storage device 21 by one writing, but are not continuous sectors. In this case, the cached data is written into the information storage device 21 by a single write.

  Here, data writing to the information storage device 21 will be described with reference to the drawings.

  FIG. 3 is a diagram for explaining file writing to the information storage device according to the embodiment of the present invention. FIG. 3 (a) shows an example in which writing designations to consecutive sectors are not continuously generated, and FIG. 3 (b) is a case where writing designations to consecutive sectors are continuously generated. An example of the case is shown. Here, in FIG. 3, each cluster of the file system managed by the file system processing unit 13b includes four sectors, and each block of the information storage device 21 includes four sectors, which corresponds to one cluster. In the case where one sector corresponds to two blocks, an example of data writing when 12 consecutive sectors of three consecutive clusters are designated to be written is shown. In FIG. 3, description will be made assuming that the optimum writing unit is one block. Note that the number of sectors included in a cluster and the number included in a block are merely examples, and are not limited thereto, and the number of sectors included in a cluster is different from the number of sectors included in a block. It may be.

  When the first first write designation (first write designation) is received, first, as shown in FIG. 3A, the driver processing unit 13c applies the block D in the 12 sectors designated for writing. Data stored in sector 1 and sector 2 are written into block D by a single write operation. Here, erasure of the block D occurs once. Next, the driver processing unit 13c writes the data of sectors 3 to 6 stored in the block D + 1 to the block D + 1 by one write operation. Here, erasure for the block D + 1 occurs once. Next, the driver processing unit 13c writes the data of the sectors 7 to 9 stored in the block D + 2 into the block D + 2 by one write operation. Here, erasure for the block D + 2 occurs once. Next, the driver processing unit 13c caches the data of the sectors 11 and 12 stored in the block D + 3 in the RAM 15.

  When the next write designation (second write designation) is accepted, but the next write designation is not a write to a continuous sector, or when a notification that the write has been completed is received, As shown in FIG. 3A, the driver processing unit 13c writes the data of the sectors 11 and 12 cached in the RAM 15 into the block D + 3 by one write operation. Here, erasure for the block D + 3 occurs once. Since data is written as described above, the number of times of erasing in each block can be suppressed to one, so that the writing time can be shortened. In addition, since the number of times of writing to the block can be reduced, if the information storage device 21 is a flash memory having a limit on the number of times of writing to the block, the life of the information storage device 21 can be extended.

  On the other hand, when the next write designation (second write designation) is accepted and the next write designation is a write to successive sectors, the driver processing unit 13c, as shown in FIG. The data of the sectors 11 and 12 cached in the RAM 15 and the data of the sectors 13 and 14 included in the second write designation are written into the block D + 3 by one write operation. Here, erasure for the block D + 3 occurs once. As described above, since data written to the same block is also executed in a single write for consecutive write-designated sectors, the number of erasures in the same block to be written with different write designations. Therefore, the writing time can be shortened. In addition, since the number of times of writing to the block can be reduced, if the information storage device 21 is a flash memory having a limit on the number of times of writing to the block, the life of the information storage device 21 can be extended.

  Next, the operation of the optimum writing unit determination process in the information processing apparatus according to the embodiment of the present invention will be described.

  FIG. 4 is a flowchart of optimum writing unit determination processing according to an embodiment of the present invention.

  First, the driver processing unit 13c determines whether or not the information storage device 21 is connected to the interface unit 19 (step S1). If not recognized, the driver processing unit 13c waits until the information is recognized. If it is determined (step S1: YES), it is determined whether or not the optimum writing unit for the information storage device 21 is stored in the HDD 16 (step S2).

  When the optimum writing unit for the information storage device 21 is not stored in the HDD 16 (step S2: NO), the driver processing unit 13c selects one writing unit among the prescribed plural writing units. (Step S3), the information is actually written to the information storage device 21 by this writing unit (Step S4), and the data transfer speed at the time of the writing is measured (Step S5).

  Then, the driver processing unit 13c determines whether or not writing has been performed for all of the plurality of writing units (step S6), and when writing has not been performed for all the writing units (step S6: NO). In step S3, the process returns to step S3. On the other hand, if writing by all writing units is performed (step S6: YES), the process proceeds to step S7.

  In step S7, the driver processing unit 13c detects the fastest writing unit (optimal writing unit) among the measured data transfer rates, and uses this optimum writing unit as the currently connected information storage device. 21 is determined as a writing unit at the time of writing to 21, and the optimum writing unit is registered in the HDD 16 in association with the ID of the information storage device 21 (step S8).

  On the other hand, when the optimum writing unit is stored in the HDD 16, the optimum writing unit stored in the HDD 16 is determined as a writing unit at the time of writing to the information storage device 21 (step S9).

  Next, an access processing operation in the information processing apparatus according to the embodiment of the present invention will be described.

FIG. 5 is a flowchart of access processing according to an embodiment of the present invention.
The driver processing unit 13c determines whether or not a write designation has been received from the file system processing unit 13b (step S10). If the write designation has not been received (step S10: NO), the driver processing unit 13c waits for the write designation. On the other hand, when the write designation is accepted (step S10: YES), whether or not the data of the block (block corresponding to the write unit) corresponding to the last sector in the previous write designation is cached in the RAM 15 is cached. Is determined (step S11).

  As a result, if cached (step S11: YES), the driver processing unit 13c determines whether or not the current write designation is a write to an area (sector) continuous with the previous write designation. (Step S12), if it is determined that the data is written in a continuous area, the process proceeds to step S14. If the data is not written in a continuous area, the data (cache data) cached in the RAM 15 is determined. ) To the corresponding block (step S13), the cache data is deleted from the RAM 15, and the process proceeds to step S14. If the cache has not been set (step S11: NO), the process proceeds to step S14.

  In step S14, the driver processing unit 13c determines whether or not the end of the data to be written (write data) matches the delimiter of the optimum write unit, that is, the last of the plurality of sectors designated for writing. When the sector is divided for each optimum writing unit, it is determined whether or not it is the last sector of the last block of the last optimum writing unit.

  As a result, when the write data matches the delimiter of the optimum write unit (step S14: YES), it means that all the write data can be written in the optimum write unit (every n blocks). Therefore, the driver processing unit 13c writes the write data to the information storage device 21 for each optimum writing unit (step S15), and returns to step S10. If the RAM 15 has a cache, the cached data is included in the optimum write unit at the head and written to the information storage device 21.

  On the other hand, if the write data does not match the delimiter of the optimum write unit (step S14: NO), it means that the write data does not satisfy the optimum write unit for the last optimum write unit. The driver processing unit 13c writes the write data to the information storage device 21 for each optimum writing unit (step S16), and the data of the last optimum writing unit is not written to the information storage device 21 before the RAM 15 (Step S17), and the process returns to step S10. If the RAM 15 has a cache, the cached data is included in the optimum write unit at the head and written to the information storage device 21.

  Although the present invention has been described based on the embodiments, the present invention is not limited to the above-described embodiments, and can be applied to various other modes.

  For example, in the above embodiment, an optimum writing unit is determined by measuring the data transfer speed when data is actually written to the information storage device 21 and comparing the data transfer speed. However, the present invention is not limited to this, and a preset number of one or more blocks may be used as a writing unit without actually measuring.

  In the above embodiment, when the block of the last optimum write unit corresponding to the last sector designated for writing is not filled with the sector designated for writing, the block is cached in the RAM 15. However, the information may be written to the information storage device 21 without caching.

  In the above embodiment, the plurality of sectors specified for writing are written in the information storage device 21 for each optimum writing unit. However, the present invention is not limited to this, and the plurality of sectors specified for writing is written. At least one of the first part and the last part of the plurality of sectors designated to be written may be written to the information storage device 21 by only the sector corresponding to one block.

  In the above embodiment, the optimum writing unit for the information storage device 21 is stored in the HDD 16 of the information processing device 2 and the optimum writing unit is obtained therefrom. Without being limited thereto, the optimal writing unit for the information storage device 21 may be stored in the information storage device 21, and the information processing device 2 may acquire the optimal writing unit from the information storage device 21.

  In the above embodiment, the PC is described as an example of the information processing apparatus. However, the information processing apparatus is not limited to this, and may be, for example, a printer, a digital camera, a mobile phone, or the like. Any information processing device that accesses data with a storage device may be used.

2 Information processing device, 10 Device body, 11 Display device, 12 Input device, 13 CPU, 13a Application processing unit, 13b File system processing unit, 13c Driver processing unit, 14 ROM, 15 RAM, 16 HDD, 17 Display processing unit, 18 input interface unit, 19 interface unit, 20 bus, 21 information storage device.

Claims (6)

In an information processing apparatus that accesses an information storage device capable of erasing data in units of blocks including a plurality of sectors as minimum access units,
The information recording device stores the number of sectors included in each block,
Obtaining means for obtaining the number of sectors included in each block from the information recording device;
File management in which a file is managed in units of clusters each associated with a plurality of sectors, and a plurality of consecutive sectors corresponding to one or more clusters that manage a file to be written are specified as a writing target. Means,
Based on the number of sectors included in each of the acquired blocks, data writing to the information storage device for a plurality of sectors belonging to the same block in the plurality of consecutive sectors designated for writing is performed at the same writing timing. If all the sectors are not designated for writing in the block corresponding to one or more sectors at the end of the consecutive sectors designated for writing, the data of the sector designated for writing is stored in a predetermined storage means. And when all sectors of the block are aligned by the sector specified to be written next by the file management means, the data being cached in the storage means and the next writing specified Write control means for writing data to one or more blocks including the block using sector data; An information processing apparatus that. If all sectors of the block are not aligned due to the next sector designated for writing by the file management means, the data cached in the storage means is used to include one or more blocks including the block. The information processing apparatus according to claim 1, wherein data is written to a block. The information processing apparatus according to claim 1, wherein the write control unit writes data to the information storage device in units of a plurality of blocks. Actually writing data to the information storage device in units of different numbers of blocks, and further having actual measurement determination means for determining the number of blocks that is the fastest when written,
The information processing apparatus according to any one of claims 1 to 3, wherein the write control unit writes data to the information storage device in units of the determined number of blocks. In an access processing method by an information processing apparatus for accessing an information storage device capable of erasing data in units of blocks including a plurality of sectors as minimum access units,
The information recording device stores the number of sectors included in each block,
An acquisition step in which the acquisition unit of the information processing apparatus acquires the number of sectors included in each block from the information recording apparatus;
The file management means of the information processing apparatus manages a file in units of clusters including a plurality of sectors, and writes a plurality of consecutive sectors corresponding to one or more clusters that manage a file to be written. A file management step specified as
The information of the data for a plurality of sectors belonging to the same block in the plurality of consecutive sectors designated for writing based on the number of sectors included in each acquired block by the write control means of the information processing apparatus Writing to the storage device is performed at the same writing timing, and writing is specified when all sectors are not specified for writing in a block corresponding to one or more sectors at the end of the consecutive sectors specified for writing. The data stored in the block is cached in a predetermined storage means, and when all sectors of the block are aligned by the sector specified to be written next by the file management means, the storage means is cached. Using the data and the data of the sector designated to be written next, one or more blocks including the block are paired. Access processing method and a writing write control step data Te. An access processing program to be executed by a computer that accesses an information storage device capable of erasing data in units of blocks including a plurality of sectors as minimum access units,
The information recording device stores the number of sectors included in each block,
The computer,
Obtaining means for obtaining the number of sectors included in each block from the information recording device;
A file management means for managing a file in units of clusters including a plurality of sectors, and writing and designating a plurality of consecutive sectors corresponding to one or more clusters for managing a file to be written as a writing target;
Based on the number of sectors included in each of the acquired blocks, data writing to the information storage device for a plurality of sectors belonging to the same block in the plurality of consecutive sectors designated for writing is performed at the same writing timing. If all the sectors are not designated for writing in the block corresponding to one or more sectors at the end of the consecutive sectors designated for writing, the data of the sector designated for writing is stored in a predetermined storage means. And when all sectors of the block are aligned by the sector specified to be written next by the file management means, the data being cached in the storage means and the next writing specified Write control means for writing data to one or more blocks including the block using sector data Access processing program to function.

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