Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate
2008-11-14
2011-12-06
Baderman, Scott (Department: 2114)
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
C714S006100, C714S042000
Reexamination Certificate
active
08074106
ABSTRACT:
The present invention provides a storage system having a controller that can extend an old RAID group to a new RAID group without decreasing a processing speed. A conversion part reads the data from an unconverted area A1, converts it into the data based on a new RAID organization, and write it into a storage area A3of the new RAID group. An address management part updates an initial address Ps and a last address Pe saved in a flash memory if the initial address Ps saved in the flash memory and the newest last address Pe of a converted area A2are matched. When a power failure occurs, it is checked to see whether or not the data within the converted area A2is correct. The conversion part reads the initial address Ps and the last address Pe from the flash memory to resume a conversion process.
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Office Action from Japanese Patent Office issued in Japanese Patent Application No. 2008-230228, dated Feb. 4, 2011 (3 pages).
Baderman Scott
Butler Sarai
Hitachi , Ltd.
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