Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate
2007-11-06
2007-11-06
Peikari, B. James (Department: 2189)
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
C711S144000, C711S120000, C711S122000, C714S010000, C714S006130, C714S005110
Reexamination Certificate
active
10434489
ABSTRACT:
A method, apparatus, and system for preserving the cache data of redundant storage controllers, by copying the recorded data blocks and the associated cache tags in the primary cache memory of a storage controller to a secondary cache memory of an alternate, redundant storage controller, wherein upon a failure occurring in the primary cache memory of any of the storage controllers, subsequent storage requests from a host, previously intended for processing by the failed storage controller, are processed through the secondary cache memory of a non-failed, redundant storage controller that contains the failed storage's controller cache data and cache tags.
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Hicken Michael S.
Snead James N.
Beck & Tysver PLLC
Peikari B. James
Xiotech Corporation
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