Claims
- 1. An array disk subsystem, comprising:a) an ECC generator for producing an ECC for a plurality of data; b) a plurality of data disks for storing said plurality of data and said ECC; c) a counter for counting a number of I/O requests to said data disks; and d) an instruction processor for making said data disks execute a predetermined operation when said number of I/O requests counted by said counter is a predetermined number or less.
- 2. An array disk subsystem according to claim 1, wherein said predetermined operation is a backup processing during which said data disks are prevented from accepting an I/O request.
- 3. An array disk subsystem, comprising:a) an ECC generator for producing an ECC for a plurality of data; b) a plurality of data disks for storing said plurality of data and said ECC; and (c) a write data storage means for, when a write instruction is issued to one of said data disks while said data disks execute an operation which prevents said data disks from inputting and outputting data, temporarily storing data to be written in said one of said data disks.
- 4. An array disk subsystem according to claim 3, wherein said operation is a backup processing during which said data disks are prevented from accepting an I/O request.
Priority Claims (1)
Number |
Date |
Country |
Kind |
1-332718 |
Mar 1993 |
JP |
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Parent Case Info
This is a continuation application of U.S. Ser. No. 07/630,210, filed Dec. 19, 1990, now U.S. Pat. No. 5,402,428.
US Referenced Citations (11)
Continuations (1)
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Number |
Date |
Country |
Parent |
07/630210 |
Dec 1990 |
US |
Child |
08/355210 |
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US |