Recovering from abnormal interruption of a parity update...

Details Recovering from abnormal interruption of a parity update... Recovering from abnormal interruption of a parity update...

2008-04-21

2009-02-03

Lohn, Joshua A (Department: 2114)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S006130, C714S019000

Reexamination Certificate

active

07487394

ABSTRACT:
Data associated with the state of a parity update operation in a disk array system such as a RAID-6 system is stored during performance of the operation so that, in the event the operation is interrupted, recovery may be initiated using the stored data. The stored data may include a state indicator that is indicative of the status of the parity update operation, and snapshot data (e.g., a delta value indicative of a difference between new and old data) captured during the parity update operation.

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