JP2009048315A - Information processor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain miniturization of a device and efficient data access by a disk device. <P>SOLUTION: A drive exclusive for the front surface of a disk and a drive exclusive for the rear surface are arranged, so that one body drive comprises a pair of drives. The double-face disks to be mounted on both drives share a cartridge and are taken out from the same disk cartridge. A plurality of pieces of division data constituting a logical volume are obtained by dividing original data into a plurality of units and grouping the unit data in response to a prescribed rule (e.g., refer to figure 4 (a)). The adjacent division data is arranged at least on the front and rear surfaces of the different double-face disks, successively written to the disks so as to allow the numbers of front surfaces and rear surfaces to be used to be the same, and read in the same order as that in writing. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an information processing apparatus, and, for example, relates to an information processing apparatus that executes parallel access to a plurality of storage media to perform distributed writing / reading of data.

  In recent years, optical information recording media (optical discs) have been put to practical use as recording media for storing not only computer information but also information such as audio, still images, and moving images. Optical information recording media are being developed for higher density and higher speed transfer, and future drive devices that perform recording and playback will be thinner and smaller, or when storing media. Attempts have been made to reduce the thickness of the optical information recording medium itself in light of light weight and downsizing. For example, Patent Document 1 discloses that a plurality of thin information recording media are stacked and accommodated in a cartridge, and an arbitrary disk is taken out from the cartridge and mounted on a disk recording / reproducing apparatus during recording / reproduction.

  Even when the logical volume extends over a plurality of optical disks, there are cases where parallel access is not performed. However, since optical disks have lower transfer performance than HDDs and tapes, in order to improve transfer performance, it is necessary to distribute one data over a plurality of optical disks and access them in parallel. In order to realize this, for example, it is conceivable to use a disk changer device as disclosed in Patent Document 2 or a stripable disk array device as disclosed in Patent Document 3. According to these, it is possible to improve transfer performance by distributing one data to a plurality of optical disks and accessing them in parallel.

JP 2004-134019 A JP-A-8-263335 Japanese Patent Laid-Open No. 7-36634

  However, since the disk changer device described in Patent Document 2 accesses both recording surfaces while turning over the disk, a mechanism and a space for turning the disk over must be provided, resulting in an increase in the size of the apparatus. Further, since parallel access is executed while turning the disk over, it takes time to reconstruct and present one file.

  Further, in the disk array device described in Patent Document 3, although a copy of frequently accessed data is distributed and recorded on other disks with a low access frequency to improve accessibility, the accessibility is improved in addition to recording a copy. No measures are taken. Therefore, recording copy data results in a reduction in the capacity of the entire cartridge. In addition, no consideration is given to the method of arranging the distributed data on the disk, and therefore parallel access cannot be performed even if the data is distributed and arranged according to Patent Document 3 (distributed data 1A and 1B are placed on the same disk). If it is placed on the front / rear side), it will occur.

  The present invention has been made in view of such circumstances, and provides an information processing apparatus capable of realizing downsizing of the apparatus and efficient data access.

  In order to solve the above problems, in the present invention, a single access device (drive) is provided with a first surface dedicated drive and a second surface dedicated drive, and the original data to be recorded is divided to form a plurality of divided data. The divided data to be written so that the divided data adjacent to each other is not recorded on the first surface (front surface or first layer recording surface) and second surface (back surface or second layer recording surface) of the same recording medium. Control the placement of.

  That is, the information processing apparatus according to the present invention divides original data to configure a plurality of divided data as a logical volume, distributes and writes the divided data to a plurality of storage media, and writes the distributed data to the divided data. An information processing apparatus that reads and reconstructs and presents original data, and a cartridge mounting unit on which a cartridge that stores a plurality of two-sided recording media (for example, a double-sided recording disk or a multi-layered recording disk) is mounted And a drive (access part) for a first surface (front surface or first layer recording surface) and a second surface (back surface or second layer recording surface) drive (access part). And an access device (drive) that executes writing and reading of the divided data with respect to the two-side recording storage medium, and the cartridge mounted on the cartridge mounting unit. The storage medium for recording on two sides is taken out and mounted on the access unit (drive) for the first side and the second side of the access device, or from the access unit for the first side and the second side A recording medium handling mechanism for unmounting and storing the two-side recording medium in the cartridge, a control unit for controlling the mounting and unmounting operations of the recording medium handling mechanism, and the writing and reading operations of the access device (drive) And the control unit controls the handling mechanism and the access device (disk drive) based on an arrangement condition of the plurality of divided data in the plurality of two-side recording media, and the arrangement condition As an example, at least the divided data adjacent to each other may be arranged on different two-side recording media. Characterized in that it is included.

  An information processing apparatus according to another aspect of the present invention divides original data to configure a plurality of divided data as a logical volume, and distributes and writes the divided data to a plurality of storage media. An information processing apparatus that reads out the divided data, reconstructs the original data, and presents the original data. A cartridge that stores a plurality of two-sided recording media (for example, a double-sided recording disk or a multi-layered recording disk) is mounted. A cartridge mounting portion and N access devices (disk drives), each access device having a pair of first surface (front surface or first surface recording surface) access portion (disk drive) and second An access unit (disk drive) for a surface (back surface or second layer recording surface), and writing and reading of the divided data with respect to the two-side recording storage medium Removing the two-side recording storage medium from the N access devices and the cartridge mounted on the cartridge mounting portion, and accessing the first surface and the second surface of the N access devices A recording medium handling mechanism that is mounted on a portion (drive) or that unmounts the two-side recording storage medium from the first-side and second-side access units and accommodates it in the cartridge, and the recording medium handling A control unit for controlling the mount and unmount operations of the mechanism and the write and read operations of the N access devices (drives), the control unit for recording the plurality of divided data on the plurality of two-sided surfaces Based on the arrangement condition in the storage medium, the handling mechanism and the N access devices are controlled to obtain the arrangement condition. The division data adjacent to each other are arranged in different two-side recording storage media, and the division data constituting the logical volume is a multiple of 2N in the two-side recording storage medium, and the first side And the number of second surfaces are equal.

  Furthermore, an information processing apparatus according to another aspect of the present invention divides original data to configure a plurality of divided data as a logical volume, and distributes and writes the divided data to a plurality of storage media. An information processing apparatus that reads out the divided data, reconstructs and presents the divided data as original data, and includes N cartridges, each cartridge including a plurality of two-sided recording storage media (for example, a double-sided recording disk or a multilayer recording medium) A cartridge mounting portion on which N cartridges for storing recording disks) and N access devices (disk drives), each access device having a set of first surfaces (front surface and first layer) Recording surface) access unit (disk drive) and second surface (back surface or second layer recording surface) access unit (disk drive), the two-side recording memory N access devices for executing writing and reading of the divided data with respect to the body, and N recording medium handling mechanisms, wherein each of the handling mechanisms is mounted on the cartridge mounting portion. Take out the recording medium for two-sided recording from one of the cartridges and mount it on the access unit for the first side and the second side of the corresponding access device, or access for the first side and the second side N recording medium handling mechanisms for unmounting the dual-side recording storage medium from the unit and storing them in the cartridge, mounting and unmounting operations of the N recording medium handling mechanisms, and the N access devices A control unit that controls writing and reading operations, and the control unit records the plurality of two-sided records of the plurality of divided data. The handling mechanism and the N access devices are controlled based on an arrangement condition in the storage medium, and the divided data adjacent to each other are arranged in different two-side recording storage media as the arrangement condition, and The divided data constituting the logical volume is a multiple of 2N in the two-side recording medium, and the number of the first and second sides is equal.

  An information processing apparatus according to another aspect of the present invention divides original data to configure a plurality of divided data as a logical volume, and distributes and writes the divided data to a plurality of storage media. An information processing apparatus that reads out the divided data, reconstructs and presents the divided data as original data, and includes 2N cartridges, and each of the N cartridges has a first surface (a double-sided disk surface or a multi-layer recording type). A plurality of two-sided recording storage media on which information is recorded only on the first recording surface of the disc are stored, and each of the remaining N cartridges is provided on the second side (the back side of the double-sided disc or the multilayer recording type disc). A plurality of two-side recording storage media on which information is recorded only on the second recording surface), a cartridge mounting portion in which 2N cartridges are mounted, and 2N access Device (disk drive), of which N access devices are drives dedicated to the first side, and the remaining N access devices are drives dedicated to the second side, each of which is a storage for the two-sided recording 2N access devices for executing writing and reading of the divided data with respect to the first surface or the second surface of the medium, and 2N recording medium handling mechanisms, each of the handling mechanisms being the cartridge mounting unit The two-side recording storage medium is taken out from one of the 2N cartridges mounted on the disk and mounted on the corresponding drive for exclusive use of the first surface or the second surface, or only for the first surface and 2N recording medium handling mechanisms for unmounting the two-side recording medium from a drive dedicated to the second side and storing it in a corresponding cartridge; A control unit that controls the mounting and unmounting operations of the 2N recording medium handling mechanisms and the writing and reading operations of the 2N access devices, and the control unit includes the plurality of divided data items. Based on the arrangement condition in the two-side recording medium, the 2N handling mechanisms and the 2N access devices are controlled to operate independently, and at least the logical volume is configured as the arrangement condition. The plurality of divided data includes a 2N multiple plane in the two-sided recording medium and the number of first and second sides being equal.

  Further features of the present invention will become apparent from the best mode for carrying out the present invention and the accompanying drawings.

  According to the information processing apparatus of the present invention, the apparatus can be downsized and data access can be executed efficiently.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be noted that this embodiment is merely an example for realizing the present invention, and does not limit the technical scope of the present invention. In each drawing, the same reference numerals are assigned to common components. In the present embodiment, the description has been given using the double-sided recording disk as the recording medium. However, when data is written and read using the first recording surface and the second recording surface of the multilayer recording disk. Of course, it can also be applied.

<Configuration of disk unit>
FIG. 1 is a functional block diagram showing a schematic system configuration of a disk device 1 according to the present invention. The disk device 1 includes an input unit 10, a controller 11, a disk drive 13, a disk handling mechanism 14, an HDD 12, a RAM (Random Access Memory) 15, and a ROM (Read Only Memory) 16. , At least a cartridge mounting portion 17 for mounting the disk cartridge 18 and an output portion 19 are provided.

  In FIG. 1, the input unit 11 is configured by a pointing device such as a keyboard, a touch panel, or a mouse. An operator can input an instruction for recording / reproducing a file to / from the disk device 1 using the input unit 11 and input data to be recorded, a file title / comment, and the like.

  The control unit 11 is composed of a CPU and an MPU, and controls various operations of the disk device 1 according to the flowcharts of FIGS. 2 and 3, for example. The operation of the disk device 1 will be described later in detail.

  The disk drive 13 is removed from the disk cartridge 18 in which a plurality of disks are stored, and performs data writing / reading on each mounted disk. Note that a plurality of disk drives 13 are basically prepared, and one drive is configured by combining a front-side drive and a back-side drive. Details thereof will be described in first to third embodiments described later.

  The disk handling mechanism 14 takes out the target disk from the disk cartridge 18 and mounts it on the disk drive 13, and takes out the processed disk from the disk drive 13 and stores the disk in a predetermined position of the disk cartridge 18.

  The HDD 14 is a hard disk drive, and data is temporarily stored when data is distributedly written and read.

  The RAM 15 is a memory that temporarily stores data and control information. The ROM 16 stores fixed operation parameters of the disk device 1 and programs corresponding to the flowcharts of FIGS.

  One or more disk cartridges 18 are mounted on the cartridge mounting portion 17. The disc cartridge 18 stores a plurality of double-sided recording optical discs (double-sided discs) capable of recording data on both sides.

  After the data read by the disk drive 12 is reconstructed, the output unit 19 displays the reconstructed data on the display unit if it is image data, and outputs it from the speaker if it is audio data. To do.

<Disk device operation>
2 and 3 are flowcharts for explaining the operation of the disk device 1. FIG. 2 corresponds to the distributed writing of data, and FIG. 3 corresponds to the operation of reading the data written in a distributed manner. FIG. 4 is a diagram schematically showing data distributed writing / reading (striping) operation. 2 and 3 are controlled by the control unit 11 unless otherwise specified.

  When writing data, first, in step S201, data (file) to be written is input as shown in FIG. In step S202, the input data is divided as shown in FIGS. 4A and 4B, and the divided data is grouped as shown in FIG. 4C. It is desirable that the number of groupings (number of divisions) is a multiple of 2N in relation to the writing order described later.

  In step S203, based on the number of data divisions obtained in step S202, it is determined how many disks the logical volume is composed of.

  In step S204, information about which divided data is written to which disk is acquired. If each divided data is configured to correspond to the capacity of one side of the disk, for example, if the divided data is 1A, 1B, 1C, 1D... 2A, 2B, 2C, 2D. Matching divided data (for example, 1A and 1B) must not be written on the front and back surfaces of the same disk (condition 1). Also, when there are N disk drives and the number of logical volume components is two (for example, only 1A and 1B), the write order is determined only by Condition 1, and the logical volume When the number of constituent surfaces is three or more (for example, in the case of 1A, 1B, 1C, and 1D), a configuration in which the number of front and back surfaces is equal on a multiple surface of 2N (from an even number of divided data to a logical volume) (Condition 2). Thus, the order of writing the divided data is determined so as to satisfy the conditions 1 and 2. Note that rules having a predetermined writing order may be stored in the ROM 16 or the RAM 15, and data having a writing order corresponding to the number of divisions may be acquired.

  In step S205, the first access surface of the K disks constituting the logical volume is mounted on the drive and set to an accessible state. In step S206, the divided data is written on each disk surface as shown in FIGS. 4D and 4E in accordance with the writing order acquired in step S204.

  When the writing is completed, each disk is stored in the original storage location in the disk cartridge 18, and the writing process ends. It is also possible to shift to the reproduction operation without storing in the disk cartridge 18.

  Subsequently, a data read operation will be described with reference to FIGS. In the case of data reading, first, in step S301, data to be output is designated by the operator. In step S302, information on the logical volume corresponding to the data is acquired. It is assumed that the logical volume information includes information on which disk surface the logical volume is configured on.

  In step S303, information regarding the reading order from the disks constituting the logical volume is acquired. For example, when the same data is written to the disk, information on the write order is written in a predetermined area of the RAM 15 or the header part of the first disk among the disks constituting the logical volume. Then, it is only necessary to acquire the information of the writing order at the time of data reading and configure the reading order.

  In step S304, the first access surface of the disk constituting the logical volume is mounted on the drive and set to an accessible state. In step S305, the divided data recorded in a distributed manner as shown in FIG. 4F is read according to the reading order.

  In step S306, the read divided data is reconstructed as shown in FIGS. The reconstructed data is reproduced and output in an appropriate format by the output unit 19.

  In step S307, the disc that has been read is stored in the original position of the disc cartridge 18, and the reading process ends.

<Details of configuration and operation of disk handling mechanism and disk drive>
Hereinafter, the configuration and operation details of the disk handling mechanism 13 and the disk drive 12 will be described separately for each embodiment.

(1) First Embodiment FIGS. 5 and 6 show a configuration according to the first embodiment. FIG. 5 shows a case where there is one disk drive (basic configuration), and FIG. 6 shows N disk drives. Shows the case. In the present embodiment, each disk drive 13 has one front-only drive 131 and one back-only drive 132, and this one set constitutes one drive.

  Referring to FIG. 5, when the disks 1 and 2 stored in one disk cartridge 18 are accessed and parallel writing / reading (striping) is performed, first, the front surface of the disk 1 and the back surface of the disk 2 are respectively surfaced. The drive 131 and the back drive 132 are mounted and accessed. Then, the disk handling mechanism 14 unmounts the disk 1 from the front surface drive 131 (see FIG. 5 (1)), and then unmounts the disk 2 from the back surface drive 132 (see FIG. 5 (2)). Subsequently, the disk 1 is mounted on the back surface drive 132 (see FIG. 5 (3)), and the disk 2 is mounted on the front surface drive 131 (see FIG. 5 (4)). The double-sided disks 1 and 2 are accessed in this order.

  By adopting such data writing / reading order (data arrangement), and as described above, the logical volumes are different disks and have the front and back configurations (disks 1 and 2 in the example of FIG. 5). The drive 13 can always be operated in parallel. The above is the case where there is one disk drive 13.

  Next, the case where there are N disk drives 13 will be described with reference to FIG. As shown in FIG. 6, 2N double-sided disks 1 to 2N are accommodated in one disk cartridge 18. Further, one disk handling mechanism 14 and N disk drives 13 are used. Also in FIG. 6, each of the drives 1 to N includes a pair of front surface drive and back surface drive.

  When accessing the disks 1 to 2N accommodated in one disk cartridge 18 and executing parallel writing / reading (striping), first, the front surface of the disk 1, the back surface of the disk 2, the front surface of the disk 3, and the disk 4 The back surface,..., The front surface of the disk 2N-1, and the disk 2N are mounted on the front surface drives 131-1 to N and the back surface drives 132-1 to 13-N, respectively, and accessed. Then, the disk handling mechanism 14 unmounts the disk 1 from the front surface drive 131-1 (see FIG. 6 (1)), and then unmounts the disk 2 from the back surface drive 132-1 (see FIG. 6 (2)). . Subsequently, the disk 1 is mounted on the back surface drive 132-1 (see FIG. 6 (3)), and the disk 2 is mounted on the front surface drive 131-1 (see FIG. 6 (4)).

  Subsequently, the disk handling mechanism 14 unmounts the disk 3 from the front surface drive 131-2 (see FIG. 6 (5)), and unmounts the disk 4 from the back surface drive 132-2 (see FIG. 6 (6)). . Subsequently, the disk 3 is mounted on the back surface drive 132-2 (see FIG. 6 (7)), and the disk 4 is mounted on the front surface drive 131-2 (see FIG. 6 (8)). Access is sequentially executed up to the disk 2N as described above.

  When parallel access (striping) is performed with N disk drives 13 (N is 2 or more), in order to realize parallel operation of all the front and back drives, as described above, a multiple of 2N It is necessary to configure a logical volume with these disks and to have the same number of front and back surfaces of the disk. That is, when the number of disk drives is N, striping cannot be realized in all units unless disks are loaded in all the drives. For this reason, the logical volume must be composed of data divided into 2N pieces. This is because the capacity of one disk is the same, and all the disks need to be changed all at once.

  5 and 6 (including the cases of the second and third embodiments) are performed by i) using a double-sided disk, and ii) one drive with a dedicated front surface drive and a dedicated rear surface. A drive is provided (integrated type), iii) a disk cartridge is shared among a plurality of disks, iv) a disk handling mechanism is also shared between a plurality of disks, and v) i) to iv) This is because the entire disk device is desired to be downsized.

(2) Second Embodiment FIG. 7 shows a configuration according to the second embodiment. 8 to 10 are diagrams showing examples of disk arrangement of each divided data. The present embodiment employs a configuration including N disk cartridges # 1 to N that store a plurality of disks, N disk handling mechanisms # 1 to N, and N disk drives # 1 to N. is doing. As in the first embodiment, each of the disk drives 13 has one set of front-side dedicated drive 131 and one set of back-side dedicated drive 132, and this one set constitutes one drive.

  Referring to FIG. 7, when the disks 1 to 2N stored in the plurality of disk cartridges 18 are accessed and parallel writing / reading (striping) is performed, first, the front surface of the disk 1, the back surface of the disk 2, the disk 3 , The back surface of the disk 4,..., The front surface of the disk 2N-1, and the back surface of the disk 2N are mounted on the front surface drive 131-1 to N and the back surface drive 132-1 to N, respectively, and accessed. . Then, the disk handling mechanism 14-1 unmounts the disk 1 from the front surface drive 131-1 (see FIG. 7 (1)), and then unmounts the disk 2 from the back surface drive 132-1 (FIG. 7 (2)). reference). Subsequently, the disk 1 is mounted on the back drive 132-1 (see FIG. 7 (3)), and the disk 2 is mounted on the front drive 131-1 (see FIG. 7 (4)). The double-sided disks 1 and 2 are accessed in this order.

  Subsequently, the disk 3 is unmounted from the front surface drive 131-2 (see FIG. 7 (5)) and the disk 4 is unmounted from the rear surface drive 132-2 by the disk handling mechanism # 2 (14-2) (see FIG. 7). 7 (6)). Subsequently, the disk 3 is mounted on the back drive 132-2 (see FIG. 7 (7)), and the disk 4 is mounted on the front drive 131-2 (see FIG. 7 (8)). Similarly, access is sequentially performed up to the disk 2N.

  In the first embodiment described above, since only the single disk handling mechanism 14 is operated, two or more mount / unmount operations of the disks 1 to 2N cannot be executed simultaneously. On the other hand, in the second embodiment, as shown in FIG. 7, N sets of disk cartridges, disk handling mechanisms, and disk drives are provided, and each can execute independent operations. Two or more mount / unmount operations of 1 to 2N can be executed simultaneously. Accordingly, access to the disks (if the cartridges are different) stored in each of the disk cartridges # 1 to #N may be performed in parallel. As a result, the time required for parallel access can be reduced.

  In the case of the second embodiment, the divided data (see FIG. 4C) obtained by dividing the input data are 1A, 1B, 1C, 1D,... 2A, 2B, 2C, 2D,. If so, examples of the arrangement of the divided data on the disk are as shown in FIGS. As can be seen from FIGS. 8 to 10, regarding the data arrangement, the above-described conditions 1 and 2 are satisfied. That is, the arrangements of FIGS. 8 to 10 are: i) Condition 1: Adjacent divided data (for example, 1A and 1B, 2A and 2B, etc.) are not written on the front and back surfaces of the same disk, ii) Condition 2: When the number of disk drives is N, the two conditions are that the number of front and back surfaces is the same in multiples of 2N (a logical volume is composed of an even number of divided data). Satisfied. Considering FIG. 10 more specifically, in this case, the number of disk drives is four, the configuration surface of the logical volume is 2 × 4 = 8, and the number of front and back surfaces is four (conditions) 2). Adjacent data is not recorded on the same disc (condition 1 is satisfied).

(3) Third Embodiment FIG. 11 shows a configuration according to the third embodiment. This embodiment employs a configuration including 2N disk cartridges # 1 to 2N that store a plurality of disks, 2N disk handling mechanisms # 1 to 2N, and 2N disk drives # 1 to 2N. is doing. Each disc cartridge contains only a single-sided disc, or even a double-sided disc contains a disc so that only the front or back side is accessed. Further, the disk drive 13 is composed of N front surface dedicated drives and N back surface dedicated drives, and can be operated independently of each other. There are also 2N disk handling mechanisms, and the disk mounting and unmounting operations can be performed independently for each disk cartridge (front-side and back-side disk cartridges).

  According to the configuration of the third embodiment, the number of disk cartridges and disk handling mechanisms is doubled compared to the second embodiment, but parallel access can be executed exclusively for the front and back surfaces, so that the access time can be further increased. It becomes possible to shorten.

  In the third embodiment, since mounting and unmounting to each drive are independent, access is realized by sequentially accessing the disks stored in each disk cartridge as shown in FIG. Is done.

<Summary>
As described above, in the first and second embodiments, a drive dedicated to the front surface of the disk and a drive dedicated to the back surface are provided, and this one set of drives constitutes one drive. Further, the double-sided discs mounted on both drives share a cartridge and are taken out from the same disc cartridge. The plurality of divided data constituting the logical volume is configured by dividing the original data into a plurality of units and grouping the unit data according to a predetermined rule (for example, see FIG. 4A). Adjacent divided data is arranged on at least the front and back surfaces of different double-sided discs, written sequentially to the disc so that the number of front and back surfaces used is the same, and reading is also executed in the same order as when writing. (Condition 1). When N disk drives are provided, the adjacent divided data are different double-sided disks, a disk surface having a multiple of 2N is used, and the number of front and back surfaces used is equal. Data is placed. By doing so, it is not necessary to turn over the double-sided disk, and the disk device can be miniaturized. Further, since the distributed arrangement of the divided data is devised as described above, parallel access (striping) to the double-sided disk can be efficiently performed.

  Further, as in the second embodiment, a disk cartridge and a disk handling mechanism are provided for each of the N disk drives. In this way, since N disk cartridges can be handled independently, the parallel access time can be further reduced.

  Further, as in the third embodiment, the front and back surfaces of the double-sided disk can be independently accessed in parallel. By doing so, it is not necessary to make the arrangement of the divided data complicated as in the first and second embodiments, and the parallel access time can be further reduced.

  Note that the functions of the embodiments can also be realized by software program codes. In this case, a storage medium in which the program code is recorded is provided to the system or apparatus, and the computer (or CPU or MPU) of the system or apparatus reads the program code stored in the storage medium. In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the program code itself and the storage medium storing the program code constitute the present invention. As a storage medium for supplying such a program code, for example, a floppy (registered trademark) disk, CD-ROM, DVD-ROM, hard disk, optical disk, magneto-optical disk, CD-R, magnetic tape, non-volatile A memory card, ROM, or the like is used.

  Also, based on the instruction of the program code, an OS (operating system) running on the computer performs part or all of the actual processing, and the functions of the above-described embodiments are realized by the processing. May be. Further, after the program code read from the storage medium is written in the memory on the computer, the computer CPU or the like performs part or all of the actual processing based on the instruction of the program code. Thus, the functions of the above-described embodiments may be realized.

  In addition, the program code of the software that realizes the functions of the embodiment is distributed via a network, so that it is stored in a storage means such as a hard disk or memory of a system or apparatus or a storage medium such as a CD-RW or CD-R. It may be achieved by the computer (or CPU or MPU) of the system or apparatus reading and executing the program code stored in the storage means or the storage medium.

1 is a functional block diagram showing a schematic configuration of a disk device according to the present invention. 4 is a flowchart for explaining a data write operation of the disk device. 4 is a flowchart for explaining a data read operation of the disk device. It is a figure for demonstrating striping. FIG. 2 is a diagram illustrating a basic configuration including a disk cartridge, a disk handling mechanism, and a disk drive, and a write / read order according to the first embodiment. FIG. 3 is a diagram illustrating a configuration of one disk cartridge, one disk handling mechanism, and N disk drives, and a writing / reading order according to the first embodiment. FIG. 9 is a diagram showing a configuration of N disk cartridges, N disk handling mechanisms, and N disk drives, and a writing / reading order according to the second embodiment. It is a figure which shows the example of arrangement | positioning in the disk of division | segmentation data (1). It is a figure which shows the example of arrangement | positioning in the disk of division | segmentation data (2). It is a figure which shows the example of arrangement | positioning (3) in the disk of division | segmentation data. FIG. 10 is a diagram showing a configuration of a third embodiment, which includes 2N disk cartridges, 2N disk handling mechanisms, and 2N disk drives dedicated to the front and back surfaces, and the writing / reading order.

Claims (8)

Dividing the original data into a plurality of divided data as logical volumes, distributing and writing the divided data to a plurality of storage media, reading out the divided and written divided data, and reconstructing the original data for presentation An information processing apparatus that
A cartridge mounting portion to which a cartridge for storing a plurality of two-side recording storage media is mounted;
An access device having a pair of first-surface access units and second-surface access units, and writing and reading the divided data to and from the two-surface recording storage medium;
The two-side recording storage medium is taken out from the cartridge attached to the cartridge attachment portion and mounted on the access portion for the first surface and the second surface of the access device, or for the first surface and A recording medium handling mechanism for unmounting the two-side recording storage medium from the second-side access section and storing it in the cartridge;
A control unit for controlling the mounting and unmounting operations of the recording medium handling mechanism, and the writing and reading operations of the access device,
The control unit controls the recording medium handling mechanism and the access device based on an arrangement condition of the plurality of divided data in the plurality of two-side recording media.
The information processing apparatus according to claim 1, wherein the arrangement condition includes that at least the divided data adjacent to each other are arranged on different two-side recording storage media.   The number of sides of the two-sided recording storage medium in which a plurality of divided data constituting the logical volume is recorded as the arrangement condition is the same on the first side and the second side. The information processing apparatus according to 1. Dividing the original data into a plurality of divided data as logical volumes, distributing and writing the divided data to a plurality of storage media, reading out the divided and written divided data, and reconstructing the original data for presentation An information processing apparatus that
A cartridge mounting portion to which a cartridge for storing a plurality of two-side recording storage media is mounted;
N access devices, each access device having a pair of first side access unit and second side access unit, and writing the divided data to the two-sided recording storage medium And N access devices for performing the reading,
The two-side recording storage medium is taken out from the cartridge attached to the cartridge attachment portion and mounted on the first surface and second surface access portions of the N access devices, or the first surface A recording medium handling mechanism that unmounts the two-side recording storage medium from the side-side and second-side access units and accommodates it in the cartridge;
A control unit for controlling the mount and unmount operations of the recording medium handling mechanism and the write and read operations of the N access devices,
The control unit controls the recording medium handling mechanism and the N access devices based on an arrangement condition of the plurality of divided data in the plurality of two-side recording media.
As the arrangement condition, the divided data adjacent to each other are arranged in different two-sided recording storage media, and the divided data constituting the logical volume is a multiple of 2N in the two-sided recording storage medium, An information processing apparatus comprising: the first surface and the second surface being equal in number. Dividing the original data into a plurality of divided data as logical volumes, distributing and writing the divided data to a plurality of storage media, reading out the divided and written divided data, and reconstructing the original data for presentation An information processing apparatus that
A cartridge mounting portion in which N cartridges, each of which stores a plurality of two-side recording storage media, are mounted.
N access devices, each access device having a pair of first side access unit and second side access unit, and writing the divided data to the two-sided recording storage medium And N access devices for performing the reading,
N recording medium handling mechanisms, wherein each recording medium handling mechanism takes out the two-side recording storage medium from one of the N cartridges mounted in the cartridge mounting portion, and Mounted on the first surface and second surface access section, or unmounted the two-surface recording storage medium from the first surface and second surface access section and accommodated in the corresponding cartridge, N A recording medium handling mechanism;
A control unit for controlling the mounting and unmounting operations of the N recording medium handling mechanisms and the writing and reading operations of the N access devices,
The control unit controls the recording medium handling mechanism and the N access devices based on an arrangement condition of the plurality of divided data in the plurality of two-side recording media.
As the arrangement condition, the divided data adjacent to each other are arranged in different two-sided recording storage media, and the divided data constituting the logical volume is a multiple of 2N in the two-sided recording storage medium, An information processing apparatus comprising: the first surface and the second surface being equal in number.   The control unit designates the same number of two-side recording media from each of the N cartridges, mounts and unmounts the N recording medium handling mechanisms, and writes and writes the N access devices. The information processing apparatus according to claim 4, wherein a read operation is controlled. Dividing the original data into a plurality of divided data as logical volumes, distributing and writing the divided data to a plurality of storage media, reading out the divided and written divided data, and reconstructing the original data for presentation An information processing apparatus that
2N cartridges, each of which stores a plurality of two-side recording storage media on which information is recorded only on the first side, and each of the remaining N cartridges is on the second side Storing a plurality of two-side recording storage media on which information is recorded only in a cartridge mounting portion on which 2N cartridges are mounted;
2N access devices, of which N access devices are dedicated to the first surface, and the remaining N access devices are dedicated to the second surface, each of which is the first of the two-surface recording storage medium. 2N access devices that perform writing and reading of the divided data on the surface or the second surface;
2N recording medium handling mechanisms, each recording medium handling mechanism taking out the two-side recording storage medium from one of the 2N cartridges mounted in the cartridge mounting portion, and corresponding the first Mount on a dedicated access device for the surface or the second surface, or unmount the storage media for recording on the second surface from the access device dedicated for the first surface or the second surface and store it in the corresponding cartridge. Recording medium handling mechanism of
A control unit for controlling the mounting and unmounting operations of the 2N recording medium handling mechanisms and the writing and reading operations of the 2N access devices;
The control unit controls the 2N recording medium handling mechanisms and the 2N access devices to operate independently based on an arrangement condition of the plurality of divided data in the plurality of two-side recording media. And
The arrangement condition includes at least that the plurality of divided data constituting the logical volume is a multiple surface of 2N in the two-side recording medium, and the number of the first surface and the second surface is equal. An information processing apparatus characterized by that.   The control unit divides the original data into a plurality of units to form unit data, and groups the plurality of unit data according to a predetermined rule to generate the plurality of divided data. 7. The information processing apparatus according to any one of 6.   The information according to any one of claims 1 to 7, wherein the control unit sets a capacity of each of the plurality of divided data as a storage capacity of one side of the two-side recording storage medium. Processing equipment.

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