JPH1153126A - Data processor and data processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To considerably improve reliability on second data obtained by separating first data in a prescribed unit. SOLUTION: An allocation means inspects whether faults occur in the recording areas of respective recording mediums based on an allocation processing instruction obtained from outside. Only when the number of the recording mediums where the fault occurs in the recording area is within a range that can be corresponded by redundancy, second data allocated to the recording area where the defect occurs is restored based on second data recorded in the recording area without the fault and redundancy. Obtained second data is recorded in a preliminary recording area which is allocated instead of the recording area where the fault occurs. When the number of the recording mediums where the faults occur in the recording areas is larger than the range which can be corresponded by redundancy, second data allocated to the recording areas where the faults occur is used for parity check with second data recorded in the recording area without the fault. Thus, errors can precisely be discriminated when they exist.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Table of Contents] The present invention will be described in the following order.

BACKGROUND OF THE INVENTION Prior Art (FIG. 5) Problems to be Solved by the Invention (FIG. 5) Means for Solving the Problems (FIGS. 1-4) Embodiments of the Invention (1) AV Data Configuration of storage editing and sending system (FIGS. 1 and 2) (2) Configuration of data recording / reproducing device (FIGS. 3 and 4) (3) Operation and effect of the present embodiment (FIGS. 1 and 4) (4) Other Embodiments (FIGS. 1 to 4) Effects of the Invention

[0003]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing apparatus and method, and is suitably applied to, for example, an AV (Audio Video) data storage / editing / transmission system.

[0004]

2. Description of the Related Art FIG.
As shown in the figure, multiple hard disk drives (HDD:
There is a so-called disk array device 1 provided with Hard Disk Drives 2A to 2H.

As a disk array device 1 of this kind,
At present, several types are proposed depending on the distribution method of the input data D1 to the respective hard disk drives 2A to 2H, but at present, the input data D1 is bit-converted in the disk array controller 3 as shown in FIG. Alternatively, striping (separation) is performed in units of bytes, and this is stripped to a plurality of hard disk drives 2 for data recording and reproduction.
A to 2G are recorded and reproduced all at once, and parity data is generated based on the input data D1 and is recorded and reproduced on a single dedicated hard disk drive 2H. "RAID (Redundant Arrays of Inexpensive)"
Disks) -3 "is widely used.

The disk array apparatus 1 having such a configuration is actually used.
In this case, even if one of the data recording / reproducing hard disk drives 2A to 2G fails, the data allocated to the hard disk drives 2A to 2G is equivalent to the parity data stored in the dedicated hard disk. The hard disk drives 2A to 2G have a high reliability for recording and reproduction, and the hard disk drives 2A to 2G are simultaneously driven to read and write the input data D1. This has the advantage that the transfer rate is about N times the effective transfer rate per unit and the capacity is about N times the hard disk drives 2A to 2G.

[0007]

By the way, in the disk array device 1 having such a configuration, of the plurality of recording areas (for example, LBA (Logical Block Address)) of the hard disk in each of the hard disk drives 2A to 2H,
When a defect occurs in any of the recording areas, preliminary recording is performed in a recording area where the defect has occurred (hereinafter referred to as a defect recording area) under the control of a higher-level main control unit. An area is allocated, and thereafter, a spare recording area is used instead of the defective recording area.

In practice, in the disk array apparatus 1, at the time of an allocation process for allocating a defect recording area to a spare recording area,
The main controller specifies the hard disk drives 2A to 2H one by one in order, specifies the recording area of the hard disks in the hard disk drives 2A to 2H, and further issues a defect inspection instruction (for example, VeriFye (Veri
fy) command), it is checked whether or not a defect has occurred in the specified recording area of the hard disk in the specified hard disk drives 2A to 2H based on the defect inspection command.

In the disk array device 1,
When a defect occurs in the recording area of the hard disk in any of the hard disk drives 2A to 2H, the main control unit causes the hard disk drive having the defective recording area (hereinafter, referred to as a failed hard disk drive) 2A to 2H. Is assigned and an assignment command (for example, a Reassign Blocks command) is given. Based on the assignment command, a spare recording area is set in the defect recording area on the hard disk of the failed hard disk drive 2A-2H. assign.

In addition, in the disk array device 1, a repair command (for example, Rebuild
) Command), the data or the parity data allocated to the defect recording area of the hard disk in the failed hard disk drives 2A to 2H based on the repair command are transferred to the failed hard disk drive 2A.
2H to 2H, the data is restored based on the data or parity data recorded in the same non-defective recording area of the hard disks in the hard disk drives 2A to 2H, and the data or parity data obtained by the restoration is replaced with the failed hard disk. The data is recorded in the spare recording area in the drives 2A to 2H.

By the way, in the disk array apparatus 1, due to the configuration of "RAID-3", only when a defect occurs in one of the same recording areas of the hard disks in each of the hard disk drives 2A to 2H. ,
Redundancy is set based on data or parity data recorded in all defect-free recording areas so that data or parity data allocated to the defect recording area can be correctly restored.

However, in this disk array device 1,
Even when defects occur in a plurality of recording areas among the same recording areas of the hard disks in the respective hard disk drives 2A to 2H, the data or parity data allocated to each of these defective recording areas is repaired. As a result, there is a problem that the data or parity data allocated to each of the defect recording areas is erroneously repaired.

In addition to this, in the disk array apparatus 1, although data or parity data allocated to each defect recording area is erroneously repaired, data or parity obtained by erroneously repairing the data or parity data is obtained. Parity data is generated between the data and the correct data or parity data used to restore the data or the parity data based on the data obtained from the data recording / reproducing hard disk drives 2A to 2H. Since the relationship is maintained so as to obtain the data or parity data, which is determined by erroneously performing a so-called parity check to determine whether or not the relationship between each data and the parity data is correct during reproduction processing. Data and the correct data or parity data used to restore these data or parity data. When run against, would have been determined that all data and parity data they are correct, a problem that significantly reduce the reliability of the data or the parity data has been made.

The present invention has been made in consideration of the above points, and has as its object to propose a data processing apparatus and method capable of significantly improving the reliability of the second data.

[0015]

According to the present invention, in order to solve the above-mentioned problem, the supplied first data is separated into a plurality of second data in a predetermined unit, and each of the second data is divided into a plurality of second data. , And the recorded data is distributed to a plurality of recording media, and / or each second data is reproduced from the corresponding recording medium, and the first data is restored and output based on the reproduced second data. Whether or not a defect has occurred in each of the designated recording areas of each recording medium based on recording and / or reproducing means and an assignment processing command that designates a recording area to be assigned on the recording medium obtained from outside If a defect has occurred in the designated recording area of any of the recording media, a spare recording area is assigned instead of the designated recording area of the recording medium, and the defect is assigned to the designated recording area. Has occurred Only when the number of recording media is within the range that can be handled by the redundancy, based on all the second data and the redundancy recorded in the defect-free designated recording area of the recording medium, And allocating means for restoring the second data allocated to the designated recording area having the defect and recording the restored second data in a spare recording area of the recording medium. I made it.

As a result, if the number of recording media having a defect in the designated recording area is larger than the range which can be handled by the redundancy, the recording medium is sorted to the designated recording area having the defect. The second data that has been repaired is used in a parity check together with the second data recorded in the designated recording area having no defect without being repaired, and the designated parity check is used by the parity check. It is possible to accurately determine that there is an error in the second data allocated to the specified recording area and the second data recorded in the specified recording area having no defect.

In the present invention, the supplied first data is divided into a plurality of second data in a predetermined unit, and each of the second data is distributed to a plurality of recording media with redundancy and recorded. And / or a first step of reproducing each second data from the corresponding recording medium, restoring and outputting the first data based on the reproduced second data, and a recording obtained from outside. Based on an allocation processing instruction specifying a recording area to be allocated on the medium, an inspection is performed to determine whether or not a defect has occurred in each of the specified recording areas of each recording medium, and any of the recording media is designated. If a defect occurs in the specified recording area, a spare recording area is allocated instead of the designated recording area of the recording medium, and the number of recording media having the defect in the designated recording area is determined by the redundancy. Available range Only in the case of, based on all the second data recorded in the defect-free designated recording area of the recording medium and the redundancy, the recording medium is assigned to the designated recording area having the defect. A second step of restoring the obtained second data and recording the second data obtained by the restoration in a spare recording area of the recording medium.

As a result, if the number of recording media having a defect in the designated recording area is larger than the range which can be handled by the redundancy, the recording medium is sorted to the designated recording area having the defect. The second data that has been repaired is used in a parity check together with the second data recorded in the designated recording area having no defect without being repaired, and the designated parity check is used by the parity check. It is possible to accurately determine that there is an error in the second data allocated to the specified recording area and the second data recorded in the specified recording area having no defect.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

(1) Configuration of AV Data Storage / Editing / Sending System In FIG. 1, reference numeral 10 denotes an entire AV to which the present invention is applied.
1 shows a data storage editing and sending system, and video and audio data D10A to D10N transmitted via a line or reproduced from a video tape by a video tape recorder.
Is received via the switch 11 and sent to the encoder unit 12.

The encoder 12 subjects the supplied video / audio data D10A (D10B to D10N) to predetermined data processing such as compression encoding and format conversion as necessary, and then obtains the video / audio data thus obtained. Data D1
1 to the server data controller 13.

In the server data controller 13, a control section 15 having a microcomputer configuration and a terminal device 16 A via a LAN (Local Area Network) 14.
16B, and captures the video / audio data D11 supplied from the encoder unit 12 based on a recording command given from the control unit 15, and receives this in a SCSI (SmallC
omputer System Interface) The data is transmitted to a data recording / reproducing device 18 having a “RAID-3” configuration connected via an interface 17.

At this time, the address (LB) of the hard disk on which the video / audio data D11 is to be recorded is previously stored in the data recording / reproducing device 18 from the server data controller 13.
A) A recording command including information is provided.

Thus, the data recording / reproducing device 18 transmits the server data controller 1 based on the recording command.
Then, the video / audio data D11 supplied from 3 is allocated to the designated LBAs of the plurality of hard disks and recorded.

The video / audio data D11 recorded separately on a plurality of hard disks in the data recording / reproducing device 18 can be reproduced using the terminal devices 16A and 16B.

In practice, in the terminal devices 16A and 16B, when the operator selects the edit list creation mode and designates the start point of the video / audio data D11 to be reproduced, a reproduction command corresponding thereto is issued via the LAN 14. The data is sent to the server data controller 13.

At this time, the server data controller 13
Is the LB of the video / audio data D11 to be reproduced to the data recording / reproducing device 18 based on the supplied reproduction command.
A playback command including the A information is transmitted, and thus the video / audio data D11
To play.

The server data controller 13 transmits the video / audio data D11 reproduced at this time from the data recording / reproducing device 18 to the corresponding terminal device 1 via the LAN 14.
6A, 16B, and thus the video / audio data D
11 is displayed on the displays of the terminal devices 16A and 16B, and audio based on the video and audio data D11 is emitted from the speakers of the terminal devices 16A and 16B.

As a result, the operator operates the terminal 16
A, 16B based on the video displayed on the display and the audio output from the speaker.
A and 16B can be used to create a list (hereinafter referred to as an edit list) that defines how the video and audio data D11 is processed and edited to create video and audio for broadcasting.

The operator operates the terminal devices 16A, 16A.
B, it is possible to create a list (hereinafter referred to as an on-air list) that defines when the edited and edited video / audio is to be broadcasted. The edited list and the on-air list thus created can be created. The data is provided to the control unit 15 via the LAN 14, and is stored and held by the control unit 15.

The control unit 15 manages the transmission time of each edited video on the basis of the data of the stored on-air list. When the transmission time of any of the edited video and audio is reached, the control unit 15 responds based on the editing list. LA command to play
The data is sent to the server data controller 13 via N14.

At this time, the server data controller 13
Sends the specified video / audio data D11 to the data recording / reproducing device 18 by sending a reproduction command including the LBA information of the video / audio data D11 to be reproduced to the data recording / reproducing device 18 based on the supplied reproducing command. , And sends it to the decoder unit 19.

The decoder section 19 performs predetermined data processing such as decoding and format conversion on the supplied video and audio data D11 as necessary, and converts the thus obtained video and audio data D12A in the original signal form. It is sent to the switch 20.

At this time, the switch 20 is supplied with the video / audio data D12B to D12N from another video / audio data source installed in a studio or the like (not shown).
One channel of video and audio data D12A (D12B to D12N) is selected from A to D12N under the control of the control unit 15 and is transmitted via the transmission device 21.

Thus, in the AV data storage / editing / transmission system 10, the supplied video / audio data D10A to D10N can be edited at a specified time so as to be broadcast at a specified time. It has been done.

In the case of the AV data storage / editing / sending system 10, the server data controller 1 as described above is used.
The recording / reproducing process of the video / audio data D11 by the data recording / reproducing device 18 through the intermediary 3 is performed when the video / audio data D11 to be recorded / reproduced collide in the SCSI interface 17 connecting the server data controller 13 and the data recording / reproducing device 18. This is performed under the control of the server data controller 13 so as not to be performed.

In practice, the server data controller 13
As shown in FIG. 2A, a predetermined time (for example, 133 [ms]; hereinafter, this predetermined time is referred to as an allocated time) T ₁ for the encoder unit 12, the decoder unit 19, and each of the terminal devices 16A and 16B. Is assigned cyclically.

Then, the server data controller 13
As shown in FIG. 2B, a recording command C1 corresponding to a recording command of the video / audio data D11 output from the encoder unit 12 supplied from the control unit 15, and reproduction of the edited video / audio data D11 supplied from the control unit 15 Playback command C2 for command and terminal devices 16A, 16B
Commands C3, C based on the playback command supplied from
By providing 4 to the corresponding allocated time T ₁ data recording and reproducing apparatus 18, as shown in FIG. 2 (C), supplied from the encoder 12 to the data recording and reproducing apparatus 18 in its assigned time T ₁ Video and audio data D11
It was recorded, or are adapted to reproduce the video and audio data D11 specified to the data recording and reproducing apparatus 18 in its assigned time T _1.

As described above, in the AV data storage / editing / transmission system 10, the data recording / reproducing device 18 can perform the recording operation and the reproducing operation in a time division manner under the control of the server data controller 13. Thus, data transfer from the encoder unit 12 to the data recording / reproducing device 18 and data transfer from the data recording / reproducing device 18 to the decoder unit 19 are performed.
Alternatively, the recording operation and the reproducing operation can be performed simultaneously in parallel without conflicting with the data transfer to the terminal devices 16A and 16B.

(2) Configuration of Data Recording / Reproducing Apparatus Here, the data recording / reproducing apparatus 18 is configured as shown in FIG.
command data such as a recording command C1 (FIG. 2B) and reproduction commands C2 to C4 (FIG. 2B) and video / audio data D11 with the server data controller 13 (FIG. 1) through the Can be transmitted and received.

In this case, when the recording command C1 is given from the server data controller 13 via the SCSI interface 17, the SPC 30 sends the recording command C1 to the CPU 31, and transmits the video / audio data D11 supplied subsequently thereto to the data controller 32. To send to.

The data controller 32, FIFO corresponding to the supplied separating video and audio data D11, for example, every 1 byte is, the resulting hard disk drive 33A~33G for data recording and reproducing the separated data D11 _A ~D11 _G (First-In First-Out) Memory 34A-34G
To each of them and give them to memorize them.

[0043] The data controller 32 calculates the parity data D11 _P on the basis of the time obtained each separation data D11 _A ~D11 _G was, resulting parity data D11 _P a parity data recording and reproducing of The data is given to and stored in the FIFO memory 34H corresponding to the hard disk drive 33H.

Each of these FIFO memories 34A to 34A-3
Separation data stored respectively in the 4H D11 _A ~D11
_G or parity data D11 _P is read by the SPC35A~35H corresponding to the original control of CPU 31, provided to the corresponding hard disk drive 33A~33H via the SCSI INTERFACE 36a to 36h, each of these hard disk drives 33A-33H
Is recorded in the designated LBA of the hard disk in the.

At this time, each hard disk drive 33A
To 33H are respectively given separation data D11 _A to
D11 _G or after the recording process to the hard disk of the parity data D11 _P, when was the status information) recorded correctly indicating whether or not recorded in separate data D11 _A ~D11 _G or correct hard disk and parity data D11 _P is "Good "If you can not record correctly," Ch
eck Condition ") is sent to the CPU 31 via the corresponding SPCs 35A to 35H.

Thus, in the data recording / reproducing apparatus 18, when a recording error occurs in any of the hard disk drives 33A to 33H in the recording mode,
CPU 31 controls each hard disk drive 33A-33H
It is possible to recognize which of the hard disk drives 33A to 33H has a recording error on the basis of the status information respectively supplied from.

On the other hand, the SPC 30 receives the reproduction commands C2 to C4 (FIG. 2) from the server data controller 13 (FIG. 1).
When (B)) is given, this is sent to the CPU 31.

In this case, the CPU 31 controls each of the hard disk drives 33A to 33H via the SPCs 35A to 35H based on the reproduction commands C2 to C4 to thereby control the hard disk drives 33A to 33H.
Separating data recorded in the designated LBA of the hard disk of the inner D11 _A ~D11 _G or parity data D
The 11 _P was played, the corresponding this SPC35A~35
H to the corresponding FIFO memories 34A to 34H for storage.

At this time, each hard disk drive 33A
~33H was designated detachment data D11 _A ~D11 _G
Or after playing from the hard disk the parity data D11 _P, separation data is the designated D11 _A ~D11 _G
Or status information indicating whether or not reproduced parity data D11 _P from correctly hard disk (when was reproduced correctly "Good", the "the Check Condition" when has failed play properly) corresponding to SPC35A~
It is sent to the CPU 31 via 35H.

Then, the CPU 31 sends "Go" from all the hard disk drives 33A to 33G for data recording and reproduction.
When the status information “od” is obtained, the operation mode of the data controller 32 is set to the normal mode, while any of the hard disk drives 33A to 33A for data recording is set.
Separation data when obtaining the status information of "the Check Condition" from 33G are sorted the operation mode of the data controller 32 to the hard disk drive 33A~33G D11 _A ~D11 Paris the _G Tay data D1
1 Set the parity correction mode to be constructed based on _P.

As a result, when the normal mode is set as the operation mode, the data controller 32 sets each of the hard disk drives 33A to 33H for data recording and reproduction.
FIFO memories 34A-34 respectively corresponding to
Reads separation data D11 _A ~D11 _G from G, to consolidate it to restore the video and audio data D11 of the original signal state, and sends this to the server data controller 13 (FIG. 1) via the SPC 30..

When the parity correction mode is set as the operation mode, the data controller 32 outputs “
Separate data D11 from the FIFO memories 34A to 34G corresponding to the hard disk drives 33A to 33G for recording and reproducing data other than the hard disk drives 33A to 33G that output the status information of "Check Condition" (hereinafter referred to as defective hard disk drives). _A
Reads the ~D11 _G, FIFO corresponding to the hard disk drive 33H of parity data recording reproducing
Reading the parity data D11 _P from the memory 34H,
These read separation data D11 _A ~D11 _G and separation data D1 distributed to the defective hard disk drive 33A~33G based on parity data D11 _P
To reproduce the 1 _A ~D11 _G. Then, the data controller 32 outputs the reproduced separated data D11 _{A to} D11.
_G and hard disk drives 33A-33 for data recording / reproduction other than defective hard disk drives 33A-33G.
Restore audiovisual data D11 of the original signal form by integrating and separating data D11 _A ~D11 _G read from the FIFO memory 34A~34G corresponding to 33G, which S
It is sent to the server controller 13 (FIG. 1) via the PC 30.

In addition to the above configuration, in the case of the data recording / reproducing apparatus 18, the CPU 31 performs a series of recording operations on the video / audio data D10A to D10N fetched by the switch 11 (FIG. 1) in the recording mode or the reproducing mode. When the processing or the reproduction processing for broadcasting ends, the mode shifts to the standby mode, and a recording error or a reproduction error occurs in each of the hard disk drives 33A to 33G during the recording processing or the reproduction processing, or the recording error or the reproduction error occurs. The error information D20 such as the recording area is transmitted to the terminal device 1 via the server data controller 13 (FIG. 1).
6A and 16B, the error information D2
The contents of "0" are displayed on the displays of the terminal devices 16A and 16B (FIG. 1), so that the operator can recognize the occurrence state of the recording error or the reproduction error during the recording process or the reproduction process.

Here, the operator recognizes the state of occurrence of a recording error or a reproduction error, and if necessary, allocates a plurality of recording areas to be allocated on the hard disk to the terminal device 16A.
When specified via the server device controller 16, the CPU 31 receives an assignment processing command (for example, a reassign block command) indicating a plurality of recording areas from the terminal devices 16 A and 16 B via the server data controller 13. The mode is shifted to an allocation processing mode for executing the allocation processing based on the allocation processing.

That is, in the standby mode, the CPU 31 starts the allocation processing procedure RT1 shown in FIG. 4 at step SP1, and determines whether or not an allocation processing command is given from the server data controller 13 (FIG. 1) at the next step SP2. I do.

Then, the CPU 31 determines in this step SP2
When a positive result is obtained in the above, the mode is shifted to the allocation processing mode, and thereafter, the processing proceeds to step SP3, where the SPCs 35A to 33H are transmitted to the respective hard disk drives 33A to 33H based on the allocation processing command.
A defect inspection command for the same recording area is sent out via 35H.

Thus, each hard disk drive 33
Reference numerals A to 33H denote recording areas of the defect inspection target specified on the hard disk (hereinafter, referred to as inspection target recording areas).
And the like to regenerate that is recorded in separate data D11 _A ~D11 _G or parity data D11 _P checks whether a defect has occurred with respect to the inspection object recording area, the status information the test results ( When a defect does not occur in the inspection target recording area, it is sent to the CPU 31 via the corresponding SPCs 35A to 35H as "Good" when a defect occurs in the inspection target recording area.

Next, the CPU 31 proceeds to step SP4 and determines whether or not a defect has occurred in the inspection target recording area of the hard disk in each of the hard disk drives 33A to 33H based on the status information input. Here, obtaining a positive result in step SP4 means that any of the hard disk drives 33A to 33A
33H means that a defect has occurred in the inspection target recording area. At this time, the CPU 31 proceeds to step SP5 and sends an assignment command to all the failed hard disk drives 33A to 33H via the corresponding SPCs 35A to 35H. Thus, a spare recording area is assigned to the inspection target recording area on the hard disk in the failed hard disk drives 33A to 33H based on the assignment command.

[0059] Subsequently CPU31 proceeds to step SP6, inspected resulting range of defects in the recording area (i.e. failed hard disk drive 33A~33H of availability) separation data is allocated to the defective recording area D11 _A ~ D1
Whether it is 1 _G or may properly repair the parity data D11 _P (i.e. corresponding with allocation process) in the range of redundancy (single number of defective hard disk drive 33A~33H in the case of this embodiment) Determine whether or not.

Here, obtaining a positive result in step SP6 means that the defective hard disk drives 33A to 33A.
33H within the range (1
), And the CPU 31
Proceeds to step SP7 and proceeds to each hard disk drive 33 other than the failed hard disk drives 33A to 33H.
Corresponding this by defect-free inspection object recording area separation data D11 _A ~D11 _G or parity data D11 _P is recorded is reproduced on the hard disk to A~33H SPC35A~35H and FIFO memories 34A~34
H are sequentially transmitted to the data controller 32.

[0061] Thus CPU31, based on the separation data D11 _A ~D11 _G or parity data D11 _P by the data controller 32, the separation data D11 _A ~D11 _G or parity data D11 _P allocated to defective recording area while to repair, separated data obtained by the said repair D11 _A ~D11 _G or parity data D
FIFO memory 34A-34H and S corresponding to 11 _P
The failed hard disk drives 33A to 33H are sequentially transmitted to the failed hard disk drives 33A to 33H via the PCs 35A to 35H, and are recorded in the spare recording areas of the hard disks in the failed hard disk drives 33A to 33H.

However, at this time, the CPU 31 determines whether the separated data D11 _{A to} D11 _G or the parity data D11 assigned to the inspection target recording area of the hard disk in any one of the hard disk drives 33A to 33H having no defect.
_P is or Nakatsu been properly recorded by the occurrence of recording errors during the recording process, or the like the inspection target recording separation data reproduced from the area D11 _A ~D11 _G or reproduction error in the parity data D11 _P has occurred correct separation data from the hard disk drive 33A~33H as D11 _A ~D11 _G or parity data D11 _P
Is when has failed obtained, so as not to repair the separation data D11 _A ~D11 _G or parity data D11 _P allocated to defective recording area.

Further, the CPU 31 outputs the separated data D11 _{A to} D11 _G or the parity data D11 _P obtained by repairing in the failed hard disk drives 33A to 33H.
Is stored in the RAM 37 as recording area information D21 in correspondence with the original defect recording area in which the spare recording area is recorded.

As a result, the CPU 31
Then, based on the recording area information D21 stored in the hard disk drives 33A to 33H in the reproduction mode,
With the regenerating a spare recording area that is recorded in separate data D11 _A ~D11 _G or parity data D11 _P corresponding to the defective recording area if there is a reproduction request for defective recording area in the failure to the recording mode hard disk drive new separation data D11 _a for defective recording area in 33A~33H ~D11 _G or parity data D11 _P new separation data in the recording area of the corresponding spare when there is a request for recording D11 _a ~ D1
The 1 _G or parity data D11 _P is recorded.

Next, the CPU 31 determines whether or not the allocation processing has been executed for all the recording areas indicated by the allocation processing command in step SP8. If a negative result is obtained, the CPU 31 returns to step SP3, and thereafter in this step SP8. Until a positive result is obtained, the above steps SP8-SP3-
The loop of SP4-SP5-SP6-SP7-SP8 is repeated. Then, if a positive result is obtained in step SP8, the CPU 31 proceeds to the next step SP9 and ends the allocation processing procedure RT1.

Obtaining a positive result in step SP4 means that all hard disk drives 33A to 33A
3H means that no defect has occurred in the inspection target recording area. At this time, the CPU 31 proceeds to step S
Proceed to P8.

Obtaining a positive result in step SP6 means that the range of redundancy (1
Failed hard disk drives 33A
Means that there is ~ 33H, and at this time, the CPU 31
Step SP8 advances to, as well as not to repair the respective fault hard disk drive separate data allocated to the defective recording area of the hard disk in 33A~33H D11 _A ~D11 _G or parity data D11 _P, during the reproduction mode after this When there is a reproduction request for the defect recording area, the defect recording area is used for reproduction processing as necessary.

(3) Operation and Effect of the Embodiment In the above configuration, in the data recording / reproducing device 18 of the AV data storage / editing / transmission system 10, when the server data controller 13 gives an allocation processing command to the CPU 31, The CPU 31 checks whether a defect has occurred in the same inspection target recording area of the hard disk in each of the hard disk drives 33A to 33H based on the assignment processing command.

If a defect occurs in any of the recording areas to be inspected, a spare recording area is allocated to the defective recording area, and the number of hard disk drives 33A to 33H having a defect in the recording area to be inspected is reduced. assignment process by only if within the range of redundancy to accommodate the failure hard disk drive test no defects in the hard disk in the hard disk drive 33A~33H non 33A~33H target recording area are recorded in separate data D11 _a ~ D11 _G or based on parity data D11 _P, they failed hard disk drive 33A~
Repair separated data D11 _A ~D11 _G or parity data D11 _P allocated to defective recording area of the hard disk in 33H, separation data D obtained was the repair
The 11 _A ~D11 _G or parity data D11 _P is recorded in the spare recording area the hard disk in the failed hard disk drive 33a to 33h.

Therefore, in this data recording / reproducing device 18,
If the defect inspection object recording area in many hard disk drives 33A~33H than the number in the range of redundancy that can handle occurs by assignment process, separation data D11 _A to D distributed to each of these defective recording areas
Used to Pariteichietsuku data controller 32 with 11 _G or parity data D11 separation data is recorded in the inspection object recording area as it is without defects without repair _P D11 _{A ~D11 G} or parity data D11 _P According to the parity check, the separation data D11 _{A to} D11 distributed to each defect recording area can be obtained.
1 _G or Paris and Tei data D11 _P, separating data recorded in the inspection object recording area without defects D11 _A ~ D1
If some were Ayamatsu Some of 1 _G or parity data D11 _P can be accurately determined.

In the data recording / reproducing device 18, the separated data D11 _A distributed to the defect recording area of the hard disk in the failed hard disk drives 33A to 33H.
～D11 _G or during repair of parity data D11 _P, the failure hard disk drive other than 33a to 33h hard disk drive separation data is reproduced from the test object recording area free from defects in the hard disk in 33A~33H D11 _A ~D11 _G or when a reproduction error or the like in the parity data D11 _P has occurred, by which to not run the repair of separating data D11 _a ~D11 _G or parity data D11 _P allocated to the defective recording area, it is possible to prevent that the defect recording separate data allocated to the area D11 _a ~D11 _G or parity data D11 _P is erroneously connexion repaired.

According to the above-described configuration, the CPU 31 of the data recording / reproducing device 18 detects a defect in the same inspection target recording area of each of the hard disks in each of the hard disk drives 33A to 33H based on the assignment processing command given from the server data controller 13. It is checked whether or not a failure has occurred, and only when the defective hard disk drives 33A to 33H in the number of failed hard disk drives 33A to 33H within the range of the redundancy that can be dealt with by the allocation processing have a defect, the remaining hard disk drives 33A based on the same test object separation data recorded in the recording area D11 _a ~D11 _G or parity data D11 _P of the hard disk in ～33H, separation data D allocated to the defective recording area
11 _A ~D11 _G or repair the parity data D11 _P, separated data D11 _A obtained by the repair ～D11
By to record in the _G or spare recording area allocated in place of the defective recording area parity data D11 _P in the fault hard disk drive 33a to 33h, than the number of the range of redundancy that can be accommodated by the assignment process If a defect occurs in the test object recording area in many hard disk drives 33a to 33h, the separation data D11 _a to D distributed to each of these defective recording areas
11 _G or separation data are recorded parity data D11 _P to the inspection target recording area without defects D11 _A ~ D1
Use the 1 _G or Pariteichietsuku with parity data D11 _P, by the Pariteichietsuku, only precisely when there is was Ayamatsu Some of each of these separation data D11 _A ~D11 _G and parity data D11 _P Thus, the reliability of the separation data and the parity data can be remarkably improved.

(4) Other Embodiments In the above-described embodiments, the present invention is referred to as “RAID”
Although the description has been given of the case where the present invention is applied to the data recording / reproducing device 18 having the “-3” configuration, the present invention is not limited to this, and the supplied first data is separated into a plurality of second data in a predetermined unit. While the plurality of second data are allocated and recorded on a plurality of recording media with redundancy, each second data is reproduced from the corresponding recording medium, and based on the reproduced plurality of second data. As long as the first data can be restored and output using the redundancy as required, the present invention may be applied to a data processing device having various other configurations.

In the above-described embodiment, a case has been described in which the data recording / reproducing device 18 to which the present invention is applied is applied to the AV data storage / editing / transmission system 10. However, the present invention is not limited to this. The present invention may be applied to various other systems for recording and reproducing video / audio data or various other data on a plurality of recording media.

[0075] In the above embodiment, the first data D11 supplied into a plurality of second data D11 _A ~D11 _P of a predetermined unit, the respective second data D11 _A ~D11 _P Is allocated to a plurality of recording media with redundancy and recorded, and / or each second data D11 _A
The ～D11 _P reproduced from the corresponding recording medium, the recording and or reproducing means for outputting to restore the first data D11 on the basis of the second data the reproduced data controller 32, FIFO memory 34A~34H , SPC
35A-35H, Hard disk drive 33A-33
Although the case where H is applied has been described, the present invention is not limited to this, and a recording unit having various other configurations may be applied.

Further, in the above-described embodiment, each of the designated recording areas of each recording medium is provided with a defect based on an assignment processing instruction that designates a recording area to be assigned on the recording medium obtained from the outside. It is checked whether or not a defect has occurred in any of the designated recording areas of the recording medium, and a spare recording area is assigned in place of the designated recording area of the recording medium, and All the second data D recorded in the defect-free designated recording area of the recording medium only when the number of recording media having defects in the recorded recording area is within the range that can be handled by the redundancy.
11 based on the _{A ~D11 P} and redundancy of the second data D11 _{A ~D11 P} distributed to the recording region designated occurring defects of the recording medium repaired, obtained by the restoration as an allocation means for recording the second data D11 _a ~D11 _P in the spare recording area of the recording medium, CPU 3
1, data controller 32, FIFO memory 34A-
Although the description has been made of the case where the H.34H, the SPCs 35A to 35H, the hard disk drives 33A to 33H, and the RAM 37 are applied, the present invention is not limited to this. .

[0077]

As described above, according to the present invention, the first data to be supplied is separated into a plurality of second data in a predetermined unit, and each of the second data is provided with a plurality of redundancy to provide a plurality of second data. Recording and / or reproducing means for distributing and recording on a recording medium, and / or reproducing each second data from the corresponding recording medium, restoring and outputting the first data based on the reproduced second data; And, based on an allocation processing instruction that specifies a recording area to be allocated on a recording medium obtained from the outside,
It is checked whether or not each of the designated recording areas of each recording medium has a defect. If any of the designated recording areas of the recording medium has a defect, the designated recording area of the recording medium is designated. A spare recording area is allocated in place of the recording area, and only when the number of defective recording media in the designated recording area is within the range that can be handled by the redundancy, the designated recording without defect of the recording medium Based on all the second data recorded in the area and the redundancy, the second data allocated to the designated recording area where the recording medium has a defect is repaired, and the second data is restored and obtained. And allocating means for recording the specified second data in a spare recording area of the recording medium, so that the number of recording media having a defect in the designated recording area can be dealt with more by redundancy. More than inside In this case, the parity check is performed together with the second data recorded in the designated recording area having no defect without repairing the second data allocated to the designated recording area having the defect. Between the second data allocated to the designated recording area having the defect and the second data recorded in the designated recording area having no defect by the parity check. It is possible to accurately determine that there is an erroneous one, and thus it is possible to realize a data processing device capable of significantly improving the reliability of the second data.

Further, the supplied first data is separated into a plurality of second data in a predetermined unit, and each of the second data is distributed to a plurality of recording media with redundancy and recorded, and / or Reproducing the second data from the corresponding recording medium;
A first step of restoring and outputting the first data based on each of the reproduced second data, and an assignment processing command that designates a recording area to be assigned on the recording medium obtained from outside. It is checked whether or not each of the designated recording areas of each recording medium has a defect. If any of the designated recording areas of the recording medium has a defect, the designated recording area of the recording medium is designated. A spare recording area is allocated in place of the recorded recording area, and only when the number of defective recording media in the designated recording area is within a range that can be handled by the redundancy, the designated recording area having no defect is designated. Based on all the second data recorded in the recording area and the redundancy, the second data allocated to the designated recording area where the defect of the recording medium has occurred is restored, and the restored second data is restored. The second obtained By providing the second step of recording data in the spare recording area of the recording medium, the number of recording media having a defect in the designated recording area can be reduced within a range that can be handled by redundancy. If there are many, the second data allocated to the designated recording area where the defect has occurred is not repaired, and the second data recorded in the designated recording area where there is no defect is not repaired. The second data allocated to the designated recording area having the defect and the second data recorded in the designated recording area having no defect are used by the parity check. It is possible to accurately determine that there is an error in the data, and thus a data processing method that can significantly improve the reliability of the second data can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an AV data storage / editing / sending system to which the present invention is applied.

FIG. 2 is a timing chart for explaining a recording / reproduction control process performed by a server data controller;

FIG. 3 is a block diagram showing a configuration of a data recording / reproducing apparatus according to the present embodiment.

FIG. 4 is a flowchart showing an assignment processing procedure.

FIG. 5 is a schematic block diagram showing the configuration of a general disk array device.

[Explanation of symbols]

10 AV data storage / editing / sending system, 13 Server data controller, 18 Data recording / reproducing device, 31 CPU, 32 Data controller, 3
3A-33H ... Hard disk drive, 37 ... R
AM, D11 _A ~D11 _G ...... separation data, D11 _P ...
... Parity data, RT1 ... Assignment processing procedure.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI G11B 20/18 570 G11B 20/18 570Z 572 572B 572F

Claims (4)

[Claims] 1. A method according to claim 1, wherein the supplied first data is divided into a plurality of second data in a predetermined unit, and each of the second data is allocated to a plurality of recording media with redundancy and recorded. A recording and / or reproducing means for reproducing each of the second data from the corresponding recording medium and restoring and outputting the first data based on the reproduced second data; Based on an allocation processing command specifying a recording area to be allocated on the recording medium, an inspection is performed to determine whether or not each of the specified recording areas of the recording medium has a defect. When the defect occurs in the designated recording area of the recording medium, a spare recording area is allocated in place of the designated recording area of the recording medium, and the occurrence of the defect occurs in the designated recording area. Above Only when the number of recording media is within the range that can be dealt with by the redundancy, all the second recordings in the designated recording area free of defects of the recording medium are performed.
The second data allocated to the designated recording area where the defect has occurred in the recording medium is repaired based on the data and the redundancy, and the second data obtained by the repair is restored. And an allocating means for recording the second data in the spare recording area of the recording medium. 2. The allocating means according to claim 2, wherein said second data and said redundant data are recorded only when all the second data recorded in said defect-free designated recording area of said recording medium are correct. Based on the degree
2. The data processing apparatus according to claim 1, wherein the second data allocated to the designated recording area where the defect has occurred in the recording medium is restored. Separating the supplied first data into a plurality of second data in a predetermined unit, and distributing and recording each of the second data on a plurality of recording media with redundancy; and / or A first step of reproducing each of the second data from the corresponding recording medium and restoring and outputting the first data based on the reproduced second data; and Based on an allocation processing command specifying a recording area to be allocated on the recording medium, an inspection is performed to determine whether or not a defect has occurred in the specified recording area of each of the recording media. When the defect occurs in the designated recording area of the recording medium, a spare recording area is allocated in place of the designated recording area of the recording medium, and the defect occurs in the designated recording area. Recording medium Only when the number of bodies is within the range that can be accommodated by the redundancy, all the second recordings in the specified recording area free of defects of the recording medium are performed.
The second data allocated to the designated recording area where the defect has occurred in the recording medium is repaired based on the data and the redundancy, and the second data obtained by the repair is restored. A second step of recording the second data in the spare recording area of the recording medium. 4. The method according to claim 2, wherein the second data is written only when all of the second data recorded in the defect-free designated recording area of the recording medium is correct. Based on the above redundancy,
4. The data processing method according to claim 3, wherein the second data allocated to the designated recording area of the recording medium where the defect occurs is restored.