JPH11212732A - Recording controller and recording control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily recognize the exchanged magnetic disk device in the case that one or more of the plural magnetic disk devices incorporated in a disk array device are exchanged. SOLUTION: Identification information for identifying the respective magnetic disk devices is recorded in the respective magnetic disk devices 11-11 and the identification information recorded in the respective magnetic disk devices 111 -11N is stored in a flash memory 28. Then, the identification information recorded in the respective magnetic disk devices 111 -11N and the storage contents of the flash memory 28 are compared. Corresponding to the compared result, a prescribed processing is performed. Thus, in the case that one or more of plural recording media are exchanged, the exchanged recording medium is recognized and quick coping is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording control device and a recording control method, and more particularly to, for example, an AV (Audio and Video) server system for delivering video data (and accompanying audio data) in real time. The present invention relates to a suitable recording control device and recording control method.

[0002]

2. Description of the Related Art In recent years, with the improvement of hardware processing speed, for example, a randomly accessible HDD (Hard D
disk array device (RAI) with multiple isk Drives
A server called a non-linear AV server capable of real-time distribution of video data (and accompanying audio data) (AV data) using D (Redundancy Array Inexpensive Disks)) has been realized.

[0003] The disk array device used in such an AV server has a plurality of built-in HDDs as described above, and video data is recorded in each HDD in, for example, a time-division manner.

The AV server has one or more processors called IOPs (Input Output Processors) as blocks for controlling input / output of video data to / from the disk array device. Video data is written (recorded) to the disk array device via the IOP, and video data written to the disk array device is read (reproduced) via the IOP. Further, the AV server has a main board for collectively managing the disk array device. For example, a recording position of video data is managed by the main board.

[0005]

By the way, when the HDD built in the disk array device fails, for example,
It may be replaced with another new HDD. When the HDD constituting the disk array device is replaced, if the replacement is performed while the power supply of the AV server is turned on, it is generally recognized that the replacement of the HDD has been performed on the main board. be able to.

However, if the HDD is replaced while the AV server is turned off, conventionally, the operator of the AV server or other administrator has
Unless the main board is notified that the D has been replaced (for example, by operating a keyboard, a new HD
D).
It was difficult to recognize that the HDD was replaced on the main board.

Therefore, for example, in a disk array apparatus, as an error correction method, for example, parity is recorded in one of a plurality of HDDs, and data is recorded in a time-division manner in the remaining HDDs, so-called RAID3. In the case of using a so-called HDD, the parity detects that the data has an error.
Can be recognized as having been exchanged. However, even in this case, the main board cannot recognize that the HDD has been replaced until the data reading is started from the plurality of HDDs and an error is detected by the parity.

On the other hand, if the main board can recognize that the HDD has been replaced before sending the data, the data is rebuilt in advance.
Or format a new HDD after replacement, and exclude the new HDD from processing (for example, data distribution processing). Become.

The present invention has been made in view of such circumstances, and when one or more of a plurality of recording media has been replaced, it is possible to easily recognize the replaced recording medium. To make it possible.

[0010]

According to a first aspect of the present invention, there is provided a recording control apparatus comprising: a recording unit for recording identification information for identifying each recording medium on each of a plurality of recording media; Storage means for storing the recorded identification information, identification information recorded on each of a plurality of recording media,
It is characterized by comprising a comparing means for comparing the contents stored in the storage means, and a processing means for performing a predetermined process in accordance with the comparison result of the comparing means.

According to a sixth aspect of the present invention, in the recording control method, identification information for identifying each recording medium is recorded on each of the plurality of recording media, and the identification information recorded on each of the plurality of recording media is stored in the storage unit. Is stored.

In the recording control device according to the first aspect, the recording means records identification information for identifying each recording medium on each of the plurality of recording media, and the storage means stores the identification information on each of the plurality of recording media. The recorded identification information is stored. The comparing means compares the identification information recorded on each of the plurality of recording media with the contents stored in the storage means, and the processing means performs predetermined processing in accordance with the comparison result of the comparing means. I have.

According to the recording control method of the present invention, identification information for identifying each recording medium is recorded on each of the plurality of recording media, and the identification information recorded on each of the plurality of recording media is stored in the storage means. Information is stored.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a non-linear AV server system to which the present invention is applied (a system is a group of a plurality of devices that are logically assembled, and whether each device is in the same housing). (Regardless of whether it is or not) is shown as a configuration example of one embodiment.

[0015] In this embodiment, AV server system, M-number of IOP1 ₁ to 1 _M, the main board 2, the time slot generator 4, SBX (Striping Bus eXtensio
n) bus 5, and four disk array devices 6 _{1 to} 6
_Consists of _four .

[0016] The IOPs _{1 1 to} 1 _M are video data supplied thereto (and audio data associated therewith).
Via the SBX bus 5 to the disk array devices 6 _{1 to} 6 ₄ (hereinafter, the disk array devices 6 _{1 to} 6 ₄ are collectively referred to as appropriate, or each of them is referred to as the disk array device 6), and The written video data is read from the disk array device 6 via the SBX bus 5 and output to the outside.

More specifically, the IOPs _{11 to} 1 _M divide external video data into the same number as the disk array devices 6 _{1 to} 6 ₄ , that is, in the present embodiment, into four streams. Output to SBX bus 5. The four divided stream is recorded is supplied to the disk array units ₆₁ to 6 _4. That is, the disk array device 6
In _{1-6 4,} stream obtained by 4 dividing the video data in IOP1 ₁ to 1 _M are recorded respectively. The IOPs _{1 1 to} 1 _M correspond to the disk array device 6
_The video data recorded by dividing into _{four in} each of ₁ to 64 is read out via the SBX bus 5 and multiplexed into one stream, that is, returned to the original video data and output to the outside.

[0018] In addition, between the IOP1 ₁ to 1 _M and the disk array units ₆₁ to 6 _4, in a format complying with SBX standards are adapted to exchange of data. That is, in between the IOP1 ₁ to 1 _M and the disk array units ₆₁ to 6 _4, a predetermined synchronization signal, the status for notifying a command or a recording and reproducing state for indicating like recording and reproducing, and further, Data is exchanged in a form in which required video data to be recorded or reproduced video data are sequentially arranged. The synchronization signal is supplied to a time slot generation circuit 4 described later.
Are arranged at the start timing of the time slot signal to be output. That is, the time slot generation circuit 4 includes the IOPs _{11 to} 1 _M and the main board 2
Through the SBX bus 5, the disk array devices 6 _{1 to} 6 ₄
A time slot signal for giving a time slot for accessing the time slot in a time-division manner is generated, and the synchronization signal is arranged at the head of each time slot.

[0019] Here, in between the IOP1 ₁ to 1 _M and the disk array units ₆₁ to 6 _4, except SBX, for example, SCSI (Small Computer System Interface)
It is also possible to exchange data in accordance with the standard. However, in the case where the right to use the bus adopts a standard given by arbitration (arbitration), as in the SCSI standard, when data is to be transmitted in a certain IOP, In some cases, the right to use the bus is not given, making it difficult to transmit data in real time. So IOP
The exchange of data between the 1 ₁ to 1 _M and the disk array units ₆₁ to 6 _4, as SBX standards, use of the bus is employed in each IOP, a standard given in a time division Is preferred.

[0020] Note that receives data for IOP1 ₁ to 1 _M is recorded on the disk array units ₆₁ to 6 _4, also, an external device supplies the data reproduced from the disk array units ₆₁ to 6 ₄ Examples thereof include a video switcher and a control computer.

The main board 2 has a file system 2
A are mounted, the main board 2, the file system 2A, the disk array units ₆₁ to 6 ₄
It manages the recording position of the above file. Then, the main board 2, via a bus (not shown), communicates with IOP1 ₁ to 1 _M, the recording position of the file the video data to be recorded or video data to be reproduced is stored (e.g., sector number, etc. ). The main board 2 is, for example, an Ethernet 3
Through an external device such as a video switcher or a computer (not shown).

The time slot generating circuit 4 generates a time slot signal as described above, and outputs the IOPs _{11 to} 1 _M
To supply. That is, the disk array device 6
P1 ₁ to 1 _M, since there is a possibility that also accessed from any of the main board 2, the time slot generator 4
Manages access to the disk array device 6 so as not to conflict. Specifically, as described above, the access right to the disk array device 6
P1 _{1 to} 1 _{M are provided to} the main board 2 in a time-division manner, and the time slot generation circuit 4 supplies a time slot signal (for example, 100 ms) to each block connected to the SBX bus 5 sequentially. (A unit time slot signal). The access right to the disk array device 6 is given to the block represented by the time slot signal.

The disk array device 6, as shown in FIG. 2 to be described later, has a plurality of magnetic disk devices as a plurality of recording medium (HDD), in accordance with commands supplied from IOP1 ₁ to 1 _M , to record the video data supplied from the same IOP1 ₁ to 1 _M, also,
Reads the already recorded video data and outputs the IOP
And supplies to 1 ₁ to 1 _M.

Next, the operation will be described.

First, when recording video data,
In IOP1 _m (m = 1, 2,..., M), video data to be recorded is divided into four streams,
A synchronization signal and a recording command for instructing recording are added to each stream. Then, the IOP 1 _m transmits the video data of each stream to which the synchronization signal and the recording command are added to the disk array device 6 via the SBX bus 5 at the timing of the time slot allocated to itself.
Supplied respectively ₁ to 6 _4. Disk array device 6 ₁
Or a 6 ₄ respectively, in accordance with a recording command from IOP1 _m, also the video data from IOP1 _m is recorded. Further, in each of the disk array devices 6 _{1 to} 6 ₄ , after recording the video data, a recording status as information relating to the recording is configured and transmitted to the IOP 1 _m via the SBX bus 5.

It should be noted that video data is stored in IOP1 _m .
For example, it is possible to supply the data to the disk array device 6 after performing MPEG (Moving Picture Experts Group) coding or the like.

On the other hand, during reproduction, IOP1 _m is
A sync signal is added to the playback command that instructs playback,
At the timing of the time slot assigned to itself,
Via the SBX bus 5, and supplies each of the disk array units ₆₁ to 6 _4. In each of the disk array devices 6 _{1 to} 6 ₄ , according to the playback command from the IOP 1 _m ,
The video data is played. Further, in each of the disk array devices 6 _{1 to} 6 ₄ , after the reproduction of the video data, a reproduction status as information relating to the reproduction is configured, and transmitted together with the reproduced video data to the IOP 1 _m via the SBX bus 5. You. IOP1 _m, the video data from the disk array units ₆₁ to 6 ₄ respectively is received and multiplexed into original first stream is output to the outside.

If the video data is encoded, the IOP1 _m is multiplexed, decoded, and then outputs the video data to the outside.

FIG. 2 shows an example of the configuration of the disk array device 6 of FIG.

As shown in FIG.
Are N magnetic disk devices (HDDs) 11 _{1 to} 1
1 _N , a control circuit 12, and a SCSI bus 13.

The magnetic disk devices 11 _{1 to} 11 _N are SC
It is connected to the control circuit 12 via the SI bus 13, and records data supplied from the control circuit 12, reproduces the recorded data, and supplies the data to the control circuit 12.

The control circuit 12 has a SCSI bus I / F (In
terFace) 21, CPU (Central Processing Unit) 2
2, ROM (Read Only Memory) 23, RAM (Random
Access Memory) 24, ECC (Error Correct Codin)
g) circuit 25, SBX bus I / F 26, is composed of an Ethernet port 27 and a flash memory 28, is adapted to control the reading and writing of data to the magnetic disk device 11 ₁ to 11 _N (recording and reproducing).

[0033] That is, SCSI bus I / F21 is between the magnetic disk device 11 ₁ to 11 _N, in compliance with the SCSI standard is adapted to exchange data.
The CPU 22 (recording means) (comparing means) (processing means)
By executing a program (computer program) stored in the ROM 23, various processes are performed. The ROM 23 stores programs to be executed by the CPU 22 and other necessary data.
The RAM 24 is used for the operation of the CPU 22 and the ECC circuit 25.
Necessary data is temporarily stored.

The ECC circuit 25 calculates the parity to be added to the video data supplied via the SBX bus 5, as well as added to the video data, based on the parity, from the magnetic disk device 11 ₁ to 11 _N Error correction of reproduced video data is performed. The SBX bus I / F 26 is connected to the SBX bus 5
It is designed to exchange data.

The Ethernet port 27 is connected to the Ethernet when exchanging data via the Ethernet. In the present embodiment, the Ethernet port 27 is provided for debugging the disk array device 6.

The flash memory 28 (storage means) is adapted to store identification information for identifying the magnetic disk device 11 ₁ to 11 _N with the disk array device 6.

In the disk array device 6 configured as described above, when a recording command is supplied together with video data to be recorded via the SBX bus 5, the recording command and the video data are transmitted to the SBX bus I / O. F26
Is received at

The recording command is supplied from the SBX bus I / F 26 to the CPU 22, and upon receiving the recording command, the CPU 22 converts the video data transmitted together with the recording command into a magnetic data in accordance with, for example, the RAID3 standard. performs control to be recorded on the disk device 11 ₁ to 11 _N. That, CPU 22 is video data, divided into one less number N-1 of the stream than the number N of the magnetic disk device 11 ₁ to 11 _N, by controlling the ECC circuit 25, the video data for each stream, For example, one byte of parity is calculated for each byte. Then, the video data of the N-1 1 byte, via the SCSI bus I / F21, with is recorded is supplied to the magnetic disk device 11 ₁ to 11 _N-1, the parity of the corresponding 1 byte , SCSI bus I
/ Via F21, is recorded is supplied to the magnetic disk apparatus 11 _N.

After the recording of all the video data is completed, the CPU 22 configures a recording status relating to the recording and outputs it to the SBX bus 5 via the SBX bus I / F 26.

As described above, the disk array device 6
In, video data is recorded.

On the other hand, in the SBX bus I / F 26,
When a reproduction command is received via the BX bus 5, the CPU 22 sets N-1 corresponding to the reproduction command.
Video data in 1-byte units are transferred to the SCSI bus I /
Through F21, it reads from the magnetic disk device 11 ₁ to 11 _N-1, respectively, the parity of the corresponding 1-byte units, via the SCSI bus I / F21, read from the magnetic disk device 11 _N.

Then, the CPU 22 supplies the N-1 pieces of video data and the corresponding parity to the ECC circuit 25, and performs error correction based on the parity. And
The CPU 22 multiplexes the error-corrected N-1 pieces of video data into one stream, and outputs the multiplexed data to the SBX bus 5 via the SBX bus I / F 26 together with a reproduction status relating to the reproduction.

As described above, the disk array device 6
Then, the recorded video data is reproduced.

The CPU of the disk array device 6
In 22, for example, it is supplied via the Ethernet port 27, in accordance with an instruction from the outside, are adapted to the format of the magnetic disk device 11 ₁ to 11 _N is performed. In the present embodiment, for example, when the format are adapted to process also performed to register the identification information for identifying the magnetic disk device 11 ₁ to 11 _N of the disk array device 6 is built.

That is, the flowchart of FIG.
2 shows a format process performed according to an external instruction.

[0046] In the formatting process, first, in step S1, the format of the magnetic disk device 11 ₁ to 11 _N is performed. When the magnetic disk device 11 ₁ to 11 _N format is completed, the flow proceeds to step S2, the magnetic disk device 11 ₁ to 11 _N, for example, a given sector, for identifying the magnetic disk device 11 ₁ to 11 _N The identification information is written.

Here, in the embodiment of FIG. 2, the number n is written as identification information in the magnetic disk device 11 _n (n = 1, 2,... N). In addition,
In the embodiment of FIG. 2, the identification information written in the magnetic disk device 11 ₁ to 11 _N are thereafter,
Characters a are attached by separating them with commas (,), and the characters a indicate that the identification information is recorded on the magnetic disk device.

[0048] After writing the identification information to each magnetic disk device 11 ₁ to 11 _N, the process proceeds to step S3, the flash memory 28, a magnetic disk device 11 ₁ to 1
The address corresponding to 1 _N, respectively, the magnetic disk device 11 ₁ to 11 _N with the identification information written in each written to end the formatting process.

Here, in the embodiment of FIG. 2, the identification information written in the flash memory 28 includes
Characters b are added by separating them with commas (,), and the characters b indicate that the identification information is recorded (stored) in the flash memory 28.

In step S3, in FIG.
For example, the identification information of the _nth magnetic disk device 11 _n provided from the left is stored at the address n of the flash memory 28.

As described above, the identification information for identifying each magnetic disk device is recorded in each of the magnetic disk devices 11 _{1 to} 11 _N , and the flash memory 2
8, since so as to store the identification information recorded on the magnetic disk device 11 ₁ to 11 _N, after formatting, so long as the magnetic disk apparatus is not replaced, the identification information recorded on the magnetic disk device, a flash memory When the magnetic disk device is replaced, the identification information matches the identification information stored in the corresponding address of No. 28.
The information read from the magnetic disk device as the identification information does not match the identification information stored at the corresponding address in the flash memory 28, which makes it possible to recognize whether the magnetic disk device has been replaced. Become.

[0052] Incidentally, in the magnetic disk device 11 ₁ to 11 _N respectively, sector identification information is recorded is made so as not to be used for recording other data.

Next, the CPU 22 compares the identification information recorded on the magnetic disk devices 11 _{1 to} 11 _N with the identification information stored at the corresponding addresses of the flash memory 28, thereby obtaining the information of the magnetic disk device. A magnetic disk device check process for checking whether or not the replacement has been performed is also performed. The magnetic disk device check process is performed, for example, when the power of the disk array device 6 is turned on or every time a predetermined time elapses.

FIG. 4 is a flowchart showing a magnetic disk drive check process performed by the CPU 22.

In the magnetic disk check process, first, in step S11, the magnetic disk device 11 ₁
To any one of 11 _N, but is a check target, from its magnetic disk unit to be checked, identification information (information recorded in a sector which is a recording of the identification information) is read, Proceed to step S12. In step S12, the storage content of the address where the identification information of the magnetic disk device to be checked is recorded in the flash memory 28 is read and compared with the identification information read from the magnetic disk device to be checked.

Then, the flow advances to step S13 to determine whether or not the identification information read from the magnetic disk device to be checked matches the storage content read from the flash memory 28. If it is determined in step S13 that the identification information read from the magnetic disk device to be checked does not match the storage content read from the flash memory 28, the process proceeds to step S14.
It is recognized that the magnetic disk device to be checked has been replaced, and the magnetic disk device is excluded from the processing for recording and reproducing video data in the future, and the process proceeds to step S15.

If it is determined in step S13 that the identification information read from the magnetic disk device to be checked matches the storage content read from the flash memory 28, step S14 is skipped.
The process proceeds to step S15, the all N of the magnetic disk device 11 ₁ to 11 _N of the disk array device 6 has a check target, whether we compared identification information is determined. In step S15, if the still, all the N magnetic disk device 11 ₁ to 11 _N as checked and determined to not compared identification information,
Returning to step S11, the above-described processing is repeated with a magnetic disk device for which identification information has not been compared yet as a new check target.

Meanwhile, in step S15, the all N of the magnetic disk device 11 ₁ to 11 _N as checked, if it is determined that were compared identification information, the process proceeds to step S16, from the target of the processing in step S14 It is determined whether the removed magnetic disk device exists. If it is determined in step S16 that there is a magnetic disk device excluded from the processing target, the process proceeds to step S17. For example, the order of the magnetic disk device from the left of the disk array device 6 is determined. The IOPs _{11 to} 1 _M (external devices) together with the information (hereinafter, appropriately referred to as position information) indicating that the magnetic disk device has been replaced (hereinafter, appropriately referred to as exchange information).
(Send), and the magnetic disk device check processing ends. If it is determined in step S16 that there is no magnetic disk device excluded from the processing target, step S17 is skipped and the magnetic disk device check processing ends.

When the position information and the exchange information are received in the IOPs _{11 to} 1 _M , the magnetic disk devices (basically,
In addition to excluding the new magnetic disk device after the exchange from being subjected to data recording and reproduction processing, it is possible to instruct the format and further the data rebuilding.

As described above, the identification information for identifying each magnetic disk device is recorded in each of the magnetic disk devices 11 _{1 to} 11 _N , and the flash memory 2
8 stores the identification information recorded in each of the magnetic disk devices 11 _{1 to} 11 _N , and then stores them in the magnetic disk device 11 _1.
1 to 11 _N are compared with the contents stored in the flash memory 28, and a predetermined process is performed in accordance with the comparison result. Therefore, the magnetic disk device is replaced with a new one. In this case, it is possible to easily and early recognize that the magnetic disk device has been replaced, and that the magnetic disk device has been replaced. It is possible to promptly take flexible measures such as performing formatting or rebuilding.

Further, since the replaced magnetic disk device can be specified, the data can be rebuilt quickly.

[0062] In the present embodiment, it has been to provide a four disk array units ₆₁ to 6 _4, the disk array device 1 to three or may be five or more.

In this embodiment, the error correction is performed in accordance with the standard of RAID3. However, the error correction may be performed in accordance with other standards such as RAID1, RAID5, and the like. .

[0064] Further, in the present embodiment, any of the magnetic disk device 11 ₁ to 11 _N of the disk array device 6 is built targeting when exchanged, Figure 1
As shown in (1), when the AV server system has a plurality of disk array devices 6 _{1 to} 6 ₄ , the process is performed when any one of the plurality of disk array devices 6 _{1 to} 6 ₄ is replaced. It is also possible.

In this embodiment, a magnetic disk, which is a disk-shaped recording medium, is used. However, as a recording medium for recording and reproducing video data, for example, a magneto-optical disk, an optical disk, a phase change disk,
It is possible to use a magnetic tape or the like.

[0066] Further, in this embodiment, the disk array device 6, physically but so as to incorporate a plurality of magnetic disk devices 11 ₁ to 11 _N, the disk array device 6 is logically more It is also possible to incorporate the above magnetic disk device.

Further, in the present embodiment, video data (and audio data accompanying the video data) is targeted, but it is also possible to target, for example, computer programs and other data other than video data.

[0068] Further, in this embodiment, the same identification information as the identification information written in the magnetic disk device 11 ₁ to 11 _N, but so as to store (record) in the flash memory 28, instead of the flash memory 28 Therefore, even if the power of the disk array device 6 is turned off by another rewritable nonvolatile semiconductor memory or a battery,
It is also possible to adopt a storage medium capable of retaining the stored contents, and further a magnetic disk or other recording medium.

In this embodiment, a unique numeral is used as the identification information. However, the identification information is not limited to this, and any unique information can be used. It is. That is, as the identification information, for example, a serial number assigned by a maker of the magnetic disk device or a so-called Ethernet address (MAC (Media Access Control)
Address), the address, the time at which the magnetic disk device was formatted, the version of the software (computer program) used for the format, and a combination of these. It is possible. As identification information,
If a combination of various types of information is adopted, the uniqueness can be improved.If the identification information includes the version of the software used to format the magnetic disk device, the magnetic disk When a device breaks down, it can be used to find the cause of the fault.

Here, the serial number assigned by the manufacturer of the magnetic disk device can be known by a command specified in the SCSI standard. "Furthermore, the MAC address is, for example, a UNIX machine operating under the control of Windows NT (Windows N
T, UNIX are trademarks), command line, ipconfig / a
Displayed by typing ll. "

[0071] Incidentally, as shown in FIG. 1, when a plurality of disk array units ₆₁ to 6 ₄ is provided, identification number, each of the plurality of disk array units ₆₁ to 6 ₄ is built It is desirable that the magnetic disk drive can be identified.

[0072]

According to the recording control apparatus of the present invention, identification information for identifying each recording medium is recorded on each of the plurality of recording media, and the recording means is recorded on each of the plurality of recording media. The identification information is stored. And
The identification information recorded on each of the plurality of recording media is compared with the content stored in the storage unit, and a predetermined process is performed according to the comparison result. Therefore, when one or more of the plurality of recording media are replaced, it is possible to recognize the replaced recording media and take quick action.

According to the recording control method of the sixth aspect,
Identification information for identifying each recording medium is recorded on each of the plurality of recording media, and identification information recorded on each of the plurality of recording media is stored on the storage unit. Therefore, by comparing the identification information recorded on each of the plurality of recording media with the content stored in the storage means, it is possible to easily recognize whether or not the recording medium has been replaced, and further easily recognize the replaced recording medium. It becomes possible.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration example of an embodiment of an AV server system to which the present invention has been applied.

2 is a block diagram showing a configuration example of the disk array units ₆₁ to 6 ₄ of FIG.

FIG. 3 is a flowchart illustrating a format process performed by a CPU 22 of FIG. 2;

FIG. 4 is a flowchart illustrating a magnetic disk device check process performed by a CPU 22 of FIG. 2;

[Explanation of symbols]

1 _{1 to} 1 _M IOP, 2 main board, 2A file system, 3 Ethernet, 4 time slot generation circuit, 5 SBX bus, 6 _{1 to} 6 ₄ disk array device, 11 _{1 to} 11 _N magnetic disk device, 12 control circuit, 13 SCSI bus, 21
SCSI bus I / F, 22 CPU (recording means) (comparing means) (processing means), 23 ROM, 24 RA
M, 25 ECC circuit, 26 SBX bus I / F,
27 Ethernet port, 28 flash memory (storage means)

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroyuki Fujita 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Satoshi Yoneya 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Masakazu Yoshimoto 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (72) Inventor Satoshi Satsuo 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Soni Inside the Company (72) Inventor Jun Yoshikawa 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation Inside (72) Inventor Satoshi 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (72) Inventor Tomohisa Shiga 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (72) Inventor Masaki Hirose 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Sonny Corporation

Claims (10)

[Claims] 1. A recording control device for performing control for dividing and recording data on a plurality of recording media, wherein identification information for identifying each recording medium is recorded on each of the plurality of recording media. A recording unit that stores identification information recorded on each of the plurality of recording media; and an identification information recorded on each of the plurality of recording media.
A recording control device, comprising: a comparing unit that compares the stored contents of the storage unit; and a processing unit that performs a predetermined process in accordance with a comparison result of the comparing unit. 2. The recording control device according to claim 1, wherein the processing unit outputs a comparison result by the comparison unit to an external device. 3. The recording control device according to claim 1, further comprising the plurality of recording media. 4. The recording control device according to claim 1, wherein the data is video data or audio data. 5. The recording control device according to claim 1, wherein each of the plurality of recording media is a magnetic disk. 6. A recording control method for performing control for dividing and recording data on a plurality of recording media, wherein identification information for identifying each recording medium is recorded on each of the plurality of recording media. And a storage means for storing information, wherein the identification information recorded on each of the plurality of recording media is stored. 7. The method according to claim 1, wherein the identification information recorded on each of the plurality of recording media is compared with the content stored in the storage unit, and a predetermined process is performed in accordance with the comparison result. 7. The recording control method according to item 6. 8. The method according to claim 1, wherein, as the predetermined processing, a comparison result between the identification information recorded on each of the plurality of recording media and the content stored in the storage unit is output to an external device. 8. The recording control method according to 7. 9. The recording control method according to claim 6, wherein the data is video data or audio data. 10. The recording control method according to claim 6, wherein each of the plurality of recording media is a magnetic disk.