System and method for sparing in RAID-1 system

Details System and method for sparing in RAID-1 system System and method for sparing in RAID-1 system

2006-06-13

2006-06-13

Beausoliel, Jr., Robert (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S006130

Reexamination Certificate

active

07062673

ABSTRACT:
A RAID-1 system achieves sparing by allocating 1/(2N−1) of each storage device as a spare region, in a mirrored RAID-1 system having N pair of mated devices. The remaining portion of each device is partitioned into (2N−2) data partitions. If a device fails, the contents of its mate are copied into the spare regions of the other devices. This preserves fault tolerance even if a second device subsequently fails.

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