Host I/O performance and availability of a storage array...

Details Host I/O performance and availability of a storage array... Host I/O performance and availability of a storage array...

2007-05-01

2007-05-01

Maskulinski, Michael C. (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S042000

Reexamination Certificate

active

10667949

ABSTRACT:
Improved host I/O performance and availability of a storage array during rebuild is obtained by prioritizing I/O requests. In one embodiment, rebuild I/O requests are given priority over host I/O requests when the storage array is close to permanently losing data (for example, failure of one more particular disk in the storage array would result in data loss). Rebuild I/O requests continue to have priority over host I/O requests until the storage array is no longer close to permanently losing data, at which point host I/O requests are given priority over rebuild I/O requests.

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