Disk array system and its control method

Details Disk array system and its control method Disk array system and its control method

1996-04-02

2000-04-11

Chung, Phung M.

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

G06F 1134

Patent

active

060498900

ABSTRACT:
In a disk array system of RAID (level 5) improving the system performance by distributing data, duplicated fields are allocated in a parity group in order to reduce an overhead of data write. In the data write process, write data is tentatively and duplicately written in the duplicate fields. At this time, a write completion is reported to the CPU. The parity is generated later at a proper timing and written in a SCSI drive. Generating a parity and writing data can be efficiently scheduled.

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"Nikkei Watcher IBM Verson", No. 1992, 9.14, pp. 14-15. (No Translation)

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