Storage sub-system and method for controlling the same

Details Storage sub-system and method for controlling the same Storage sub-system and method for controlling the same

2008-01-30

2011-11-01

Rizk, Sam (Department: 2112)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Error/fault detection technique

C711S114000, C719S325000

Reexamination Certificate

active

08051367

ABSTRACT:
The present invention provides means for effectively reducing the amount of data by means of de-duplication in a disk array apparatus having a data guarantee code.A control means for the disk array apparatus that adds a data guarantee code to each logical data block and checks the data guarantee code when reading data has a de-duplication performing function and control means for: generating LA substitution information for a function checking the data guarantee code or read data location address substitution information when performing the de-duplication and storing data; performing the de-duplication using the above-mentioned information when reading data; and thereby avoiding false diagnosis of the data guarantee code check.

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David A. Patterson et al., “A Case for Redundant Arrays of Inexpensive Disks (RAID)”, Proceedings of the ACM SIGMOD International Conference on Management of Data (Jun. 1988), pp. 3-14.

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