Apparatus, system, and method for differential rebuilding of...

Details Apparatus, system, and method for differential rebuilding of... Apparatus, system, and method for differential rebuilding of...

2006-11-28

2006-11-28

Bonzo, Bryce P. (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S006130

Reexamination Certificate

active

07143308

ABSTRACT:
An apparatus, system, and method are disclosed for rebuilding only changed stripes of an offline member disk in a RAID array that is configured with redundancy and no hot standby disk. A work-in-progress (“WIP”) map tracks the changed stripes of the offline member disk prior to a reactivation and records the completion of the differential rebuilding (“DR”) process on the stripes. The DR process shortens the duration of a degraded mode of operation entered into by a logical drive formed when the RAID array experiences a member disk failure that results in one member disk being designated as offline.

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