Method, apparatus, and system for preserving cache data of...

Details Method, apparatus, and system for preserving cache data of... Method, apparatus, and system for preserving cache data of...

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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patent: 2004/0153727 (2004-08-01), Hicken et al.

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