Destage management of redundant data copies

Details Destage management of redundant data copies Destage management of redundant data copies

2007-02-09

2010-02-23

Bragdon, Reginald G (Department: 2189)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S113000, C711S162000

Reexamination Certificate

active

07669008

ABSTRACT:
A method of destage management of redundant data copies in a cache storage subsystem includes providing a plurality of target storage devices, each of the plurality of target storage devices capable of storing a complete copy of a data image. The data image and the plurality of target storage devices are subdivided into a plurality of sub-regions, each of the plurality of sub-regions organized such that a minimum cumulative total of the plurality of sub-regions on the target storage devices equals a number of sub-regions required to form the complete copy of the data image. Data is destaged from a write cache to the plurality of sub-regions on the target storage devices in an order such that a minimum number of sub-regions can be combined to restore the complete copy of the data image.

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Office Action dated Jul. 17, 2009, for Chinese Counterpart Application No. 200810009450.

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