Invention Grant
- Patent Title: Disk array apparatus and control method for disk array apparatus
- Patent Title (中): 磁盘阵列装置及磁盘阵列装置的控制方法
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Application No.: US11882159Application Date: 2007-07-31
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Publication No.: US07752390B2Publication Date: 2010-07-06
- Inventor: Koji Nagata
- Applicant: Koji Nagata
- Applicant Address: JP Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Brundidge & Stanger, P.C.
- Priority: JP2004-114189 20040408
- Main IPC: G06F12/00
- IPC: G06F12/00 ; G06F13/00

Abstract:
Resources of a storage apparatus are utilized effectively by increasing and reducing a capacity of a differential LU used in a snapshot. In a disk array apparatus including a control processor which controls reading and writing of data with respect to a first logical volume which is generated using storage areas of a plural disk drives, performs control such that data in the past stored in the first logical volume is written in a second logical volume as differential data for each generation, and manages the differential data, the control processor manages a pool management table, in which a logical volume usable as the second logical volume is registered, and a pool addition object management table, in which a logical volume which can be added to the second logical volume is registered, and moves the logical volume from the pool addition object management table to the pool management table to thereby increase a capacity of the second logical volume.
Public/Granted literature
- US20080320218A1 Disk array apparatus and control method for disk array apparatus Public/Granted day:2008-12-25
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