Disk array system and its control method

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

1994-05-24

1996-11-26

Beausoliel, Jr., Robert W.

Excavating

371 371, G06F 1134

Patent

active

055794742

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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patent: 5309451 (1994-05-01), Noya et al.
"A Case for Redundant Arrays of Inexpensive Disks (RAID)", Proc. of ACM SIGMOD Conference, Jun., 1988, D. Patterson et al, pp. 109-116.
"Nikkei Watcher IBM Verson", No. 1992, 9.14, pp. 14-15. (no translation).

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