Claims
- 1. A disk array system connected to a CPU, comprising:a controller with a cache memory, and a plurality of disk drives connected to said controller, wherein one disk drive of said plurality of disk drives stores an address table that is used for converting a logical address that the CPU designates into a physical address of said disk drives, and wherein said controller reads the address table from said one disk drive into said cache memory when the disk array system power is turned on, and stores the address table from the cache memory into said one disk drive when the disk array system power is turned off, said address table being updated upon occurrence of a failure in any of said plurality of disk drives.
- 2. A disk array system according to claim 1, wherein the logical address is a combination of a cylinder address, a head address and a record address.
- 3. A disk array system according to claim 2, wherein said physical address is a SCSI drive address.
- 4. A disk array system according to claim 1, wherein said one disk drive stores the address table in a predetermined area thereof, and wherein said controller reads the address table from said predetermined area of said one disk drive into said cache memory when the disk array power system is turned on, and stores the address table from the cache memory into said predetermined area of said one disk drive when the disk array system power is turned off.
Priority Claims (2)
Number |
Date |
Country |
Kind |
4-348301 |
Dec 1992 |
JP |
|
5-125766 |
May 1993 |
JP |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
This is a continuation application of U.S. Ser. No. 08/626,332, filed on Apr. 2, 1996, now U.S. Pat. No. 6,049,890, which is a continuation application of U.S. Ser. No. 08/248,452, filed May 24, 1994, now U.S. Pat. No. 5,579,474, which is a is a Continuation-in-part of application Ser. No. 08/173,557 filed Dec. 22, 1993 now U.S. Pat. No. 5,621,882 the subject matter of which is incorporated herein by reference.
US Referenced Citations (10)
Foreign Referenced Citations (3)
Number |
Date |
Country |
4-230512 |
Aug 1992 |
JP |
6-19632 |
Jan 1994 |
JP |
9120076 |
Dec 1991 |
WO |
Non-Patent Literature Citations (2)
Entry |
D. Patterson et al, “A Case for Redundant Arrays of Inexpensive Disks (Raid)”, in ACM SIGMOD Conference, Chicago, Il. Jun. 1988. |
“Nikkel Watcher IBM Version”, Sep. 14, 1992, pp. 14-15. |
Continuations (2)
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Number |
Date |
Country |
Parent |
08/626332 |
Apr 1996 |
US |
Child |
09/444562 |
|
US |
Parent |
08/248452 |
May 1994 |
US |
Child |
08/626332 |
|
US |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
08/173557 |
Dec 1993 |
US |
Child |
08/248452 |
|
US |