Method, apparatus, and program for data mirroring with...

Details Method, apparatus, and program for data mirroring with... Method, apparatus, and program for data mirroring with...

2006-04-04

2006-04-04

Bonzo, Bryce (Department: 2114)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

Reexamination Certificate

active

07024585

ABSTRACT:
A storage controller is provided that allows data mirroring with hotspare where all drives take part in data storage. For each stripe written, a drive is designated as the hotspare. The hotspare is not a dedicated drive. Rather, the hotspare rotates as stripes are written to the drives. Thus, every drive is involved in data storage and load may be balanced among more drives. Furthermore, since each drive takes part in data storage, reconstruction after a drive failure takes less time.

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