Invention Grant
- Patent Title: Storage sub-system and method for controlling the same
- Patent Title (中): 存储子系统及其控制方法
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Application No.: US12010851Application Date: 2008-01-30
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Publication No.: US08051367B2Publication Date: 2011-11-01
- Inventor: Masahiro Arai , Kentaro Shimada , Shuji Nakamura
- Applicant: Masahiro Arai , Kentaro Shimada , Shuji Nakamura
- Applicant Address: JP Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Volpe and Koenig, P.C.
- Priority: JP2007-250139 20070926
- Main IPC: G06F11/10
- IPC: G06F11/10 ; H03M13/00
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.
Public/Granted literature
- US20090083610A1 Storage sub-system and method for controlling the same Public/Granted day:2009-03-26
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