Responding to a storage processor failure with continued...

Details Responding to a storage processor failure with continued... Responding to a storage processor failure with continued...

2006-09-28

2010-12-07

Iqbal, Nadeem (Department: 2114)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

Reexamination Certificate

active

07849350

ABSTRACT:
A technique responds to a storage processor failure. The technique involves performing write-back caching operations using a cache of a first storage processor, and mirroring data from the cache of the first storage processor to a cache of a second storage processor. The technique further involves, after of a failure of the second storage processor in which the second storage processor becomes unavailable, continuing to perform write-back caching operations using the cache of the first storage processor while the second storage processor remains unavailable. A cache controller is capable of being modified so that any write data in the cache of the first storage processor persists if the first storage processor encounters a failure thus preventing loss of the cached write data.

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