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WO2001050468A1 - Lecteur de disque - Google Patents

Lecteur de disque Download PDF

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Publication number
WO2001050468A1
WO2001050468A1 PCT/CZ2000/000091 CZ0000091W WO0150468A1 WO 2001050468 A1 WO2001050468 A1 WO 2001050468A1 CZ 0000091 W CZ0000091 W CZ 0000091W WO 0150468 A1 WO0150468 A1 WO 0150468A1
Authority
WO
WIPO (PCT)
Prior art keywords
heads
disk drive
data
ways
recording
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CZ2000/000091
Other languages
English (en)
Inventor
Otakar CERNY
Miroslav CERNY
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CZ1024899U external-priority patent/CZ9643U1/cs
Priority claimed from CZ19994790A external-priority patent/CZ9904790A3/cs
Application filed by Individual filed Critical Individual
Priority to AU19907/01A priority Critical patent/AU1990701A/en
Publication of WO2001050468A1 publication Critical patent/WO2001050468A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/012—Recording on, or reproducing or erasing from, magnetic disks
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/08—Track changing or selecting during transducing operation
    • G11B21/081—Access to indexed tracks or parts of continuous track
    • G11B21/083—Access to indexed tracks or parts of continuous track on discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/16—Supporting the heads; Supporting the sockets for plug-in heads
    • G11B21/20—Supporting the heads; Supporting the sockets for plug-in heads while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/488—Disposition of heads
    • G11B5/4886—Disposition of heads relative to rotating disc
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
    • G06F3/0671—In-line storage system
    • G06F3/0673—Single storage device
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/14—Heads, e.g. forming of the optical beam spot or modulation of the optical beam specially adapted to record on, or to reproduce from, more than one track simultaneously

Definitions

  • the invention applies to the disk drive for data reading/recording and to an usage of this disk drive.
  • disk drives are used especially as parts of devices for data processing, for example of computers, multimedia disk recording devices and players, television and telecommunication devices, but also of other similar devices (below only devices), in a process of data processing for data reading and/or recording, otherwise said for data reading/recording, namely by other parts of a device, such as especially a processor, a memory, for example semiconductor, or adapters of input/output (external, additional) devices (peripheries).
  • a disk drive consists usually of a mechanics, a controller, an interface and connecting cable or cables:
  • Mechanics compsrises usually one or more record carriers, i.e. disks, that together rotate on one spindle, further it compsrises one movable reading/recording head or together movable group of reading/recording heads, for data reading/recording in one or more tracks on each reading/recording surface of the disk, and it compsrises also holders and a positioning mechanism.
  • Mobility of a head contingently common mobility of a group of heads above the surface of disks is hereat provided thereby, that this head or group of heads is fixed on a movable holder (group of heads usually with the help of auxiliary holders), which is actuated by one positioning mechanism. So heads are by the mechanical aspect controllable mutually dependently. Tracks read/recorded during one positioning of the group of heads, placed one above the another, create a cylinder.
  • a controller strictly speaking a controller of heads, compsrises an electronic circuit, which controls the working of a disk drive, i.e. it provides the positioning of heads including their involvement into function, it organizes peculiar data reading/recording on the surface of disks by the way of encoding (during recording) or decoding (during reading) and in cooperation with a bus it provides the data carrier between the disk drive and other part of a device, for example a processor, videlicet it provides data reading/recording by parts of a device in a disk drive.
  • the controller provides switching of electronic circuits of heads into activity, videlicet into processing a cycle of data reading/recording thereby, that there is engaged always only one head - it is unable to concurrently activate two or more heads, not even if they shall practice data reading/recording by one positioning in tracks of the same cylinder. So the heads are also by electric aspect controllable mutually dependently.
  • An interface provides the connection, adaptation, communication of the disk drive with the mainboard of a device.
  • the interface is for example shaped as a card with appropriate electronic circuits and then it is plugged by the medium of connectors into an additional slot on a device bus, or the interface can be integrated directly into the mainboard.
  • the controller eventually practically the whole adapter too, can be also placed directly on a mechanics of a disk drive, insofar that the card plugged into a slot on a bus only transfers data to the bus, while data come out of the disk drive already in format of the bus, i.e. in format, which is acceptable for other parts of the device.
  • the adapter can be also common for several disk drives - it serves at the same time as a controller of their connection to the bus.
  • a cable or cables serve especially to interconnection of the controller, interface and the mechanics of the disk drive, eventually to connection of a disk drive for example to a bus of a device.
  • the connection can be fixed, permanent or by the medium of connectors.
  • disk drives have, except general properties, their specialties.
  • an optic or an magnetooptic disk drive there is used to be for data reading/recording in one, eventually in more spiral tracks available usually one disk and one head, which head along implementation allows either reading/recording, or only reading.
  • a magnetic disk drive with exchangeable disk - diskette i.e. by floppy-disk drive
  • a disk drive or its part for example a disk mechanics or an adapter, can be exchangeable in a device and in addition it can be in particular implementation from the aspect of connecting, for example internal or external, portable or stationary.
  • the device can comprise even several connecting places for various types of disk drives.
  • Connecting of each disk drive to a bus can be made for example by separate adapter or by the medium of an adapter, common for example for 4 disk drives.
  • Data carried by heads are here meant especially as the information about storage of sectors and of sector groups, data located in sectors, but also the sectors or tracks identifiers, the information about heads position and clock pulses. From/to a disk drive and inside of a device at all, there are, instead of data, carried also other kinds of information, for example addresses, control and subsidiary information, signals.
  • Particular parts of the disk drive create by the medium of the controller in every moment from all possible internal ways for data transfer, connecting particular heads with the interface, always just one internal way. i.e. a way for the possibility of sequential data reading/recording in this disk drive by other parts of the device, videlicet a way for transfer of all needful information, like data, addresses and control or subsidiary information, to realization of sequential cycles of data reading/recording.
  • the width of this way is different in different places of the disk drive - for example in a place of data reading/recording by the head on the disk the width of data way is 1 bit, while in the place of connector in the interface for connecting into a slot on the bus the data way has available for example 16-line wires - it is 16-bits wide.
  • the connecting cable hereat compsrises in all for example 68-line wires, because there are transferred by it not only data, but also addresses and other information decoded from the disk and further the information, that are not stored on a disk, but which are necessary for the function of the disk drive.
  • every disk drive compsrises an input/output electronic circuit, which is interconnected with other internal circuits of this disk drive.
  • this input/output electric circuit By the medium of this input/output electric circuit the all data and other information transfer is practiced (or the cycle of data reading/recording is practiced) also outside of this disk drive. Videlicet this circuit co-generates also the external ways, by them the disk drive is connected with input/output electronic circuits, with interfaces of other parts of a device.
  • the ways for information transfer in a device i.e. the ways, connecting input/output circuits of particular parts of a device, accordingly from the aspect of the disk drive, external ways, can comprise also for example needed interconnections, switches and converters, slots (bases, connectors) for attachment of exchangeable parts of a device, if any controllers for switching, retrieval of the way to appropriate part of a device.
  • the way for the realization of process of data reading/recording between two parts of device is a conjugate way, serving to transfer of information, for example of data, addresses and other kinds of information, needed to realization of sequential cycles of data reading/recording between two parts of device, and it usually in itself therefore compsrises one way for transfer of data, one way for transfer of addresses and another ways for transfer of other kinds of information.
  • the way for data transfer can be an element of conjugate way for realization of cycles of data reading/recording.
  • the way for data transfer can be engaged so that it serves also for transfer of other information, for example of addresses, pertinent to the process of data reading/recording, or there can be for transfer of various kinds of information with the view to increace of baud rate, for example in groups, created parallel partial ways (channels) with various width, so that for example for data transfer is available data way (data bus) of width 16 bits, for transfer of addresses the address way (address bus) of width 16 bits and for transfer of special control or additional information, signals there are available other partial ways (components of control bus) mostly 1-bit.
  • State-of-the-art disk drives allow during the process of data processing to perform data reading/recording only subsequently, always only with one head (with one of group of coactive movable heads), and this so that data reading/recording realizes always on the only one surface of the only one disk in the only one position of the only one track by means of the only one of heads, that is at me moment set into function by controller. Otherwise said, data reading/recording with head on the disk is done subsequently per one bit, by one-bit transfer, onebit way, so that in time of reading/recording of certain data bit on the disk there cannot in the same disk drive run reading/recording of other data bit.
  • access time for example in miliseconds - ms
  • baud rate for example in MB/s, Mb/s
  • Access time to searching certain position, sector on the disk consists for example by ,.hard disk" partly of exposition time, it is time for transposition of head or of groups of heads by actuator to chosen track or to cylinder including activation of the head above chosen track, and then of rotary waiting time, it is waiting, until the track on the disk turns round with given sector to the head.
  • Baud rate indicates, how quickly it is possible to read the data from the disk and to transfer them for example into RAM of the device, or also to the contrary, to transfer data from RAM and record on the disk.
  • the baud rate for example by data reading, is given above all by the fact, that data are read from sectors in tracks by particular heads subsequently, further it depends on transfer frequency and it is influenced by access time, as well as for example so that before transmission of data into internal memory of the device it must be usually performed their separation and checked up their validity.
  • Position (address) of all tracks on all disks in disk drive within selected configuration is not changed, it is known in any moment of disk drive running, it is possible for data reading/recording at any time to address the head to necessary track and to expose it by actuator.
  • Relative positions of sectors beginnings in tracks are for example by Potterhard disks" by accurate method adjustable (by formatting) and specifications (addresses) about data storage in sectors are also available in the device all the time. Factual momentary position of sectors toward heads is however not monitored and for data reading/recording it is first needed to seek this sector by head on appropriate track, which requires certain rotary waiting time.
  • Parameters of present disk drives are indeed constantly enhanced, but all the same they are often binding for the device power. Especially expressive this limit shows, if demands on cooperation of disk drive for example with processor, operating memory and another parts of device, appear quickly consecutive and further with large demands on data bulk.
  • At least partly uninterrupted function of computer parts for example of processor, working memory, adapters of external devices, their sequential cooperation with relatively slow disk drive, is enabled by temporary data storage in buffers, that are used to be component of additional device for example of disk drive adapter.
  • Actuator of disk drives requires for its working electric energy, whose consumption is above all by portable computers one of important parameters.
  • Disk drives (else disk memories too) have however also advantages - they are energy independent and allow to constantly save considerable data bulk at low price. Semiconductor memories, energy dependent and also independent, are still exceedingly quick, hereat multiway associative semiconductor memories allow also to perform data reading/recording by more ways concurrently, but by greater capacities they are exceedingly expensive.
  • Objective of the invention is to create a disk drive for data reading/recording and also methods of its application, by means of which essentially data transfer accelerates along with shortening of access time and with decrement of consumption of electric energy so that most operations of data reading/recording in the disk drive will run concurrently.
  • the invention solves mentioned objective so that it creates a disk drive for data reading/recording by various parts of device for data processing, that comprises heads for data reading/recording on the disk, -further it comprises ways for data transfer, which ways connect heads with interface of disk drive and which are elements of ways, connecting disk drive with various parts of device for data processing, whose principle consists in that it comprises at least two heads controllable mutually independently.
  • At least two heads controllable mutually independently are movable mutually independently.
  • At least one of heads controllable mutually independently is fixed.
  • a disk drive comprises at least two mutually independent ways or elements of ways for data transfer from/to various parts of a device.
  • Invention refers also to a device for data processing, comprising ways or elements of ways for data transfer from/to various parts of a device for data processing, whose substance is, that it comprises way or elements of the way for data transfer from/to disk drive, contingently from/to its interface, which disk drive comprises at least two heads controllable mutually independently.
  • Invention refers also to a device for data processing, comprising disk drive or its component, for example interface, which disk drive comprises at least two heads controllable mutually independently.
  • Invention refers also to a part of the device for data processing, for example processor, memory, adapter, mainboard or bus, comprising ways or elements of ways for data transfer from/to various parts of a device, whose substance is, that it comprises way or elements of the way for data transfer from/to disk drive, if need be from/to its interface, which disk drive comprises at least two heads controllable mutually independently.
  • Invention refers also to a part of the device for data processing, comprising disk drive or its component, for example interface, which disk drive comprises at least two heads controllable mutually independently.
  • Invention further refers to usage of the device for data processing or its parts, including disk drive, according to the invention by data processing and other information processing, namely by data reading/recording.
  • the data reading/recording is performed at least by two mutually independently controllable heads in the disk drive concurrently.
  • the data transfer from/to disk drive performs at least by two mutually independent ways concurrently.
  • the data reading/recording in the disk drive performs at least by two other parts of device concurrently.
  • FIG. 1 illustrates scheme of disk drive according to the invention with two mutually independently movable heads.
  • FIG. 2 illustrates scheme of disk drive according to the invention with one head movable and with other heads fixed.
  • FIG. 3 illustrates scheme of disk drive according to the invention with all heads fixed.
  • FIG. 4 illustrates scheme of the device according to the invention with disk drive.
  • FIG. 1, 2 and 3 there are schemes of disk drives, comprising disk mechanics 9a with movable heads 2a, if need be fixed (immovable) heads 2b for data reading/recording on the surface of the disk 1 and electronics 3, that comprises controller and adapter and that serves namely to operating with heads 2a, 2b and actuators 6, 7.
  • disk drives mutually independent data ways - internal ways 16 and elements of external ways 17, illustrated schematically, namely disk drive in FIG. 1 comprises attachment to two, for example sixteen-bit, data ways 17 and disk drives in FIG. 2 and 3 comprise attachment to twenty-five, for example sixteen-bit, data ways 17.
  • Every of these ways 17 for data transfer can comprise in itself for example partial ways for transfer of other needed information for realization of cycles of data reading/recording, it is for transfer of addresses and of control or additional information, if need be these partial ways can be for example available in one set of ways common for all data ways.
  • FIG. 1 there are hereat available two heads 2a controllable mutually independently, which are movable mutually independently, hereat their mutually independent mobility is ensured so that they are fixed to holders 4 and 5, of which every is fixed to one of actuators 6 and 7, that are mutually independent. Heads and pertinent actuators are mutually independently controllable by electronics 3 of disk drive.
  • Embodiment of disk drive at least with two mutually independently movable heads enables to realize data reading/recording for example in different tracks, but also in one track, it is in different parts of one track all at once.
  • Their usage is possible above all in magnetic disk drives with circular tracks on the disk.
  • optical or magnetooptical drives with spiral track on the disk they can be also applied, indeed in them apparently by abandonment of principle of ..constant peripheral velocity" or by buffers utilization for particular heads during reading/recording, if concurrently working heads would perform data reading/recording on various radii of the disk.
  • Data reading/recording by multibit mode can be performed for example in parallel spiral tracks and by conservation of dominant peripheral velocity" for example by means of more heads, hereat particular heads or groups of heads could be actuated by one common actuator, or else by several separate actuators, hereat corresponding actuators would move in parallel spiral tracks nearly of the same radius for example synchronously.
  • FIG. 2 there are available heads 2a, 2b controllable mutually independently in such ordering, that one head 2a is movable by fixation to movable holder 4 with actuator 6 and it enables data reading/recording in any track of given surface of the disk 1, while the other heads 2b are fixed (immovable) by attachment to holder 8, that is fixed (immovable), i.e. that it is permanent or temporarily, for example only in time of certain rotation speed of the disk 1, stabilized in one, for example adjustable, position at disk surface, insofar that these fixed heads 2b serve to data reading/recording permanent only in determinate circular tracks.
  • Fixed heads 2b can be evidently disposed only in that space, where the movable head 2a, if need be movable holder 4, do not move.
  • T is or analogical embodiment with greater number of fixed heads can be with advantage used by magnetic disk drives, above all by dismisshard disk”. It is here advantageous to use fixed heads for data reading recording above all in most often exploited tracks.
  • All heads 2b fixed by attachment to fixed holder 8. All heads 2b are here also mutually independently controllable and serve for data reading/recording permanent in determinate tracks (every head 2b in one track).
  • spiral disposition one by one piece above circular tracks of the disk 1, to ensure current density of tracks and thereby also usual total capacity of disk drive, and in such distances among heads 2b, so as not to happen to their functional interaction.
  • these heads 2b can be disposed for example in parallel spirals with beginning of spiral shifted about such part of circuit of the disk 1, that answers to number of heads 2b per track. This ordering will enable to retain fairly high number of tracks on pertinent functional surface.
  • Heads 2b can be disposed also in concentric circles over determinate circular tracks, by sufficient miniaturization in number for example several hundreds per one circle, which else by reason of width of heads 2b will limit number of tracks and capacity of disk drive, but on the other side this disposition offers possibility of bold shortening of rotary waiting time.
  • Mentioned embodiment of invention can be perspective again in rouge disk” drive, for example to creation of highly quick virtual memory with large capacity, especially then by concurrent engagement of higher number of disk drives. Creation of extra accurate track by fixed head will enable to minimize dimensions of heads, but also width and pitch of tracks, it is to increase density of fixed heads and then also of tracks, and thereby to increase capacity of the disk.
  • Holder 8 of fixed heads 2b can be embodied for example as thin plate or foil, on which heads 2b with electric supplies will be permanent or adjustably fixed. By that way it will be possible to decrease pitch of disks and hereat total height of disk drive, or else it will be possible to place more disks into the same space.
  • Holder 8 of fixed heads 2b can be made from material, that has equal or cognate thermal expansivity like base material of the disk, to as much as possible reduce possibility of different dilatations of holder and of the disk and thereby also potentiality of errors by data reading/recording by influence of thermal changes.
  • Holder can be for example in order to decrement of thermal deformations formly modified, for example by suitable distribution to segments. However it is possible to correct errors from thermal dilatations also by software.
  • Holders with fixed heads can be to the surface of disks for example also flexible and equally drawn, for example by depression caused by air streaming in space among disk surface and fixed heads in time of full speed of disks, while in time of decreased speed of disks heads and surfaces of disks will be by reason of depression fall shifted off asunder themselves.
  • This effect can be with advantage sustained by some constructions of disk drive for example by flexibility of holders with heads or by release of disks along rotation axis of disks.
  • At least two heads can be individually or within one or more groups of heads mutually independently controllable for example only upon electric aspect (namely fixed heads) or also upon mechanic aspect (movable heads).
  • disk drive can comprise coactive movable group of 8 heads, that can be by one actuator exposed to determinate cylinder with eight tracks and then, particular heads can be electrically mutually independently connected into function so that through various 1-bit ways can run reading/recording of 8 various data files for occasions of processing various processes concurrently, for example contemporarily, and hereat mutually independently.
  • Data reading/recording can run by particular mutually independently controlled heads concurrently - contemporarily for example by multibit transfer of certain data file, and this for example so that coactive movable group of 8 heads can be by one actuator exposed to given cylinder with eight tracks and data reading/recording by particular electrically mutually independently controlled heads then can run concurrently by 8-bit transfer, 8-bit way.
  • Data reading/recording can at the same time begin by all heads contemporarily, in one moment, or also for example (with buffers utilization) by some heads later, according as the engaged sector turns round to given head.
  • the partial group of 4 heads can transfer - read data from disk into sound card and the second partial group of 4 heads can in one time, concurrently, transfer - record data from network card into disk.
  • the embodiment of the disk drive that will comprise for example coactive movable group of heads electrically controllable mutually independently, ordered so that on every auxiliary holder for one surface will be fixed always at least two mutually independently controllable heads, that will be able to perform data reading/recording in corresponding tracks concurrently.
  • heads can be disposed on one holder with shift so that their radial distance will comport with adjacent tracks, or they can be disposed just abreast - then their radial distance (with regard to axis of the disk) will answer for example to 100 tracks. They can be also ordered so that several heads, each with mutually independent control, will be conjoined into one miniaturized compact aggregate on one holder.
  • mutually independently controllable heads can be on one holder ordered also consecutive so that they will allow data reading/recording concurrently in one track.
  • disk drive by the invention can comprise for example greater number of mutually independently movable groups for example of 8 heads, so that every group of heads can be exposed concurrently, in equal time, to another or also to the same cylinder, hereat particular heads within given group can be controlled subsequently or concurrently, for example contemporarily.
  • disk drive by the invention can comprise for example one coactive movable group of 8 electrically mutually independently controllable heads, hereat this group can provide data reading/recording in all tracks on every surface of every disk with that particular heads in this group will operate subsequently or concurrently, and further disk drive will comprise for example 8000 fixed heads disposed by 1000 pieces per each surface of each disk, hereat each head will ensure data reading/recording in other determinate track with that these fixed heads can be interconnected into groups for example of 16 pieces, which groups can transfer data for example concurrently or subsequently.
  • Particular heads or groups of heads can be, permanent or temporarily - dynamically, connected also for example so that they will be a component of a number of transfer ways for example in cases, when it will be necessary to transfer data on common parts of ways from/to various parts of a device contemporarily.
  • Device for data processing according to the invention can comprise for example additional device for monitoring of absolute position of sectors in tracks, it is of roll angle or distance toward some determinate position in the disk drive.
  • This additional device can be comprised for example fully or partially directly in the disk drive.
  • position monitoring it would be possible to use also for example at least one of heads, movable or fixed. If speed of the disk does not change or it only reasonably varies, it is possible for example to monitor passing of the beginning of check sector by every turn or only at certain time interval and from this to deduce position of all other sectors in following period until further check. If disk speed changes, then monitoring of disk speed and sectors position is more demanding and it will require for example more check positions.
  • Sector address can be so widen for example by parameter of momentary position toward determinate standing position of disk drive, for example toward some head in determinate track.
  • Knowledge of accurate position of sectors or accurate prediction of this position has meaning especially in that it is other of potentialities, how effectively use multiple number of heads in the track, for example: a) To shortening of the rotary waiting time; in case of demand of sector searching there is analyzed distance of sector from particular movable heads or from fixed heads in given track and after pertinent analyze of another possible criteria, for example of urgency of embodiment of other operations, it is possible to address the head for data reading/recording, that has the optimal position toward searched sector. b) To optimal timing of beginning of operation of data reading/recording is enough to begin data reading/recording till near before or at the moment by sector turn to determinate head. Data can be sent into determinate additional device directly without necessity of larger exploitation of buffers and it is possible to exploit the rotary waiting time for more urgent operations of disk drive or other parts of a device in the meantime.
  • heads, controller and interface can for data reading/recording in the same disk drive create for example several mutually independent internal ways connecting interface with heads, engaged into function by controller for example concurrently, hereat every of these ways can comprise also more heads, engaged concurrently into function by controller, and these internal ways can be within the device interconnected by interface with external ways for data reading/recording it is with ways, by that disk drive connects with input/output electronic circuits, interfaces other parts of a device.
  • the device for example processor, semiconductor RAM memory or adapter of disk drive, to perform data reading/recording for example in two disk drives according to the invention, for example by means of at least two mutually independent ways concurrently, then there could be every disk drive connected for example by complete way for data reading/recording, it is by way, that will serve to transfer of data, addresses and control or additional information.
  • both disk drives can alternately share one common address part of bus (address way), because it is used to be from time aspect essentially fewer used to capacity than data part of bus, and from the same reason also only one set of channels can be sufficient for transfer of control and additional information (common control part of bus).
  • Number of channels of address and control parts of bus can be however increased, as far as if their transmissivity would not suffice to transmissivity of multichannel data part of bus.
  • Device by the invention for example computer
  • Parts of a device for example mainboard, processor, semiconductor memory or adapter of external device, for example adapter of disk drive, (or also group of such parts of a device), can be for example equipped with connectors and especially modified input/output circuits for concurrent connection with disk drive in compliance with the invention by means of particular or multiple mutually independent ways (oneway or multiway connection) for example for data transfer, if need be for transfer of addresses or other kinds of information.
  • channels for example for data transfer, leading from disk drive
  • ways can be for example all available to all multiway (multichannel) parts of devices, for example by system of multiway (multichannel) bus with shared control, hereat ways will be to these computers parts individually, in groups or all at once, assigned stably or dynamically by momentary need in sequence for example in accordance with importance of part of a device or according to importance of data.
  • a part of the device for example mainboard or adapter of external device, can by the invention comprise disk drive or its component, for example adapter (interface) and controller.
  • Mechanics of disk drive then can be for example free connected by cable.
  • Device in compliance with the invention can be engineered for example so that its various parts will be freely connectable, for example by insertion into slots on bus, or they can in the device create a compact unit.
  • Device in sense of invention is understood also as the arrangement of particular devices, for example computers, connected for example by mutually independent ways to disk drive according to the invention, especially in such case, when these ways and their attachment were for given effect modified or installed.
  • the invention for example not only alone server or some workstation, but by their medium also whole attached computer network can have attached to usage for purposes of data reading/recording in connection with data processing in the network for example one disk drive with more heads mutually independently controllable, which disk drive can be by server or by workstation assigned for example whole under administration of one processor or any of its channels, hereat this processor or channel can give instructions for reading/recording of various files in the disk drive for example by more ways concurrently or subsequently.
  • This device for operation in the network in compliance with the invention can be for example designed also so that one disk drive by the invention can be exploited concurrently by a number of processor channels or of a number of processors, for example of array of processors (for example neural network), that can operate separately, mutually independently or as component of adapter of external device, or the disk drive can be exploited for example by a number of devices concurrently.
  • every mentioned computer or its part, for example processor or processor channel, memory or adapter can be with this disk drive connected by one or more ways.
  • FIG. 4 there is scheme of the device, which comprises disk drive 9, that comprises, for possibility of concurrent data reading/recording, eleven mutually independent internal ways 16 for data transfer, that are all used to connection with the other parts 10, 11, 12, 13, 14, 15 of the device by the medium of adapter 9b by means of mutually independent external ways 17.
  • processor 10 is connected with three ways
  • semiconductor RAM memory 11 is connected also with three ways and what applies to adapters
  • graphics card 12 is connected with two ways and the other, it is sound card 13, printer adapter 14 and network card 15, are connected always with one way.
  • Device by the invention can comprise for example adapter 9b of disk drive 9 with more heads 2a, 2b controllable mutually independently and disk mechanics 9a with heads controllable mutually independently will be connectable to device as an external one.
  • Multichannel bus serving especially for data transfer among particular multichannel parts of device, for example among parts 10, 11, 12, 13, 14, 15, can be for possibility of full power utilization of parts created for example by higher number of separate, mutually independent multibit buses, ways 18, connecting input/output circuits, interfaces of these device parts among them, in FIG. 4 it is created by three ways 18, which can be for example separately or all at once dynamically assigned in determinate sequence to three-channel parts 10, 11, 12, 13, 14, 15 of the device.
  • every of these ways 18 can comprise for example partial ways - partial buses - for transfer of data, addresses and control or additional information.
  • Disk drive 9 can be connected for example with some mutually independent ways 17 directly to particular buses, ways 18.
  • Space on disks of disk drive in compliance with the invention can be for example segmented to areas assigned to single processors or there can be all areas available to all the processors, hereat the sequence of assignment of areas to processors separately or by groups will be for example possible to be dynamically controlled in accordance with selected criteria.
  • data reading/recording in the disk drive can pass almost independently by particular processors in assigned areas according to scope of heads, hereat reading/recording operations from particular processors can from time aspect variously blend together.
  • Device by the invention can also comprise for example more disk drives according to the invention, hereat particular parts of files can be for example directly by central processor read/recorded by mutually independent ways by the help of either of mutually independently controllable heads or groups of heads for example in either of disk drives or the parts of files can be transferred for example among particular disk drives in compliance with the invention mutually.
  • Using of more mutually independently movable heads or groups of heads has utility also for example in shortening of actuating time, it is of time for location of needed track, namely so that there is exposed the head, that is next of given track.
  • actuating time reduces only to head activation, it is to electric attachment of the head and to run of instruction in electronic circuits.
  • movable or fixed that allow sequential or concurrent data reading/recording in the same track, has utility in potentiality of shortening of rotary waiting time, that answers turn of the disk with needed sector to next head, it is by pitch of heads on circle over track.
  • movable heads there can be in that case advantageous to actuate these heads or groups of heads contemporarily. So for example by placing of hundred fixed heads over track average rotary waiting time can shorten even hundredfold, thus instead of several milliseconds it will take several tens of microseconds.
  • To perform data reading/recording in the disk drive concurrently in compliance with the invention means for example, that at the same time, when it is performed the exposition of movable heads 2a to determinate track or it lasts the rotation of the disk 1 with given sector to the head 2a (rotary waiting time lasts) or it runs reading/recording of determinate data parts in the track under head 2a or it runs data transfer between processor 10 and disk drive 9 through buffer by means of one way 16, 17, 18 (one channel), for example 16-bit, there can be performed the electric attachment (activation) of fixed head 2b (the actuating in sense of movement of mechanical arms by fixed head 2b falls off), situated over the same or other track, or there can last the rotation of the disk 1 by needed sector to the head 2b (rotary waiting time lasts) or there can run reading/recording of further chosen part of data in the track under head 2b or there can run data transfer between semiconductor RAM memory 11 and the same disk drive 9 through other buffer by means of the second way 16, 17, 18 (second channel), for example 16-
  • Disk drives and devices with disk drives by the invention will be possible to be with advantage most exploited above all by production of computing technique and by its usage to complicated calculations or in applications (databases) with many concurrent operations, especially to contemporary work of more participants, for example in computer networks.
  • Alike the devices according to the invention will be able to serve to development of multimedia devices and of potentialities of their exploitation, namely to multiple concurrent access to disk with saved data.
  • Another perspective branch for utilization of the device by the invention appear to be telecommunications including television.

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Abstract

L'invention porte sur un lecteur de disque (9) qui comprend au moins deux têtes (2a, 2b) à commande indépendante, l'une de ces deux têtes (2a, 2b) étant fixe. L'invention porte également sur l'utilisation du lecteur de disque (9), et sur la lecture/enregistrement de données qui est effectué simultanément, par exemple, par au moins deux têtes (2a, 2b) à commande indépendante ou au moins par deux systèmes (16, 17, 18) indépendants ou au moins par deux parties (10, 11, 12, 13, 14, 15) du dispositif de traitement de données.
PCT/CZ2000/000091 1999-12-31 2000-12-22 Lecteur de disque Ceased WO2001050468A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU19907/01A AU1990701A (en) 1999-12-31 2000-12-22 Disk drive

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CZPV4790-99 1999-12-31
CZPUV1999-10248 1999-12-31
CZ1024899U CZ9643U1 (cs) 1999-12-31 1999-12-31 Disková jednotka
CZ19994790A CZ9904790A3 (cs) 1999-12-31 1999-12-31 Disková jednotka

Publications (1)

Publication Number Publication Date
WO2001050468A1 true WO2001050468A1 (fr) 2001-07-12

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Application Number Title Priority Date Filing Date
PCT/CZ2000/000091 Ceased WO2001050468A1 (fr) 1999-12-31 2000-12-22 Lecteur de disque

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AU (1) AU1990701A (fr)
WO (1) WO2001050468A1 (fr)

Citations (7)

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Publication number Priority date Publication date Assignee Title
DE3318279A1 (de) * 1983-05-17 1984-11-22 Erik Dipl.-Ing. 1000 Berlin Notthoff Magnetplattenlaufwerk mit unabhaengigen mehrfachkoepfen
JPH0464904A (ja) * 1990-07-05 1992-02-28 Mitsubishi Electric Corp 磁気ディスク装置
US5223993A (en) * 1989-11-03 1993-06-29 Conner Peripherals, Inc. Multiple actuator disk drive
DE4218420A1 (de) * 1992-06-04 1993-08-05 Bannert Hans Juergen Parallel-track-recording, verfahren zum parallelen aufschreiben bzw. lesen von computerdaten auf einen datentraeger (festplatte)
JPH0636516A (ja) * 1992-07-15 1994-02-10 Nec Niigata Ltd ディスク形記憶装置
JPH08124334A (ja) * 1994-10-26 1996-05-17 Hitachi Ltd シーク時間削除型磁気ディスク装置
US5805386A (en) * 1996-12-24 1998-09-08 Texas Instruments Incorporated Dual mode independent suspension read/write head assemblies in a hard disk drive

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3318279A1 (de) * 1983-05-17 1984-11-22 Erik Dipl.-Ing. 1000 Berlin Notthoff Magnetplattenlaufwerk mit unabhaengigen mehrfachkoepfen
US5223993A (en) * 1989-11-03 1993-06-29 Conner Peripherals, Inc. Multiple actuator disk drive
JPH0464904A (ja) * 1990-07-05 1992-02-28 Mitsubishi Electric Corp 磁気ディスク装置
DE4218420A1 (de) * 1992-06-04 1993-08-05 Bannert Hans Juergen Parallel-track-recording, verfahren zum parallelen aufschreiben bzw. lesen von computerdaten auf einen datentraeger (festplatte)
JPH0636516A (ja) * 1992-07-15 1994-02-10 Nec Niigata Ltd ディスク形記憶装置
JPH08124334A (ja) * 1994-10-26 1996-05-17 Hitachi Ltd シーク時間削除型磁気ディスク装置
US5805386A (en) * 1996-12-24 1998-09-08 Texas Instruments Incorporated Dual mode independent suspension read/write head assemblies in a hard disk drive

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 016, no. 264 (P - 1370) 15 June 1992 (1992-06-15) *
PATENT ABSTRACTS OF JAPAN vol. 018, no. 264 (P - 1740) 19 May 1994 (1994-05-19) *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 09 30 September 1996 (1996-09-30) *

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