Invention Grant
- Patent Title: Storage system providing virtual volume and electrical power saving control method including moving data and changing allocations between real and virtual storage areas
- Patent Title (中): 存储系统提供虚拟音量和省电控制方法，包括移动数据和改变实际和虚拟存储区域之间的分配
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Application No.: US12922258Application Date: 2010-08-26
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Publication No.: US08650358B2Publication Date: 2014-02-11
- Inventor: Koji Iwamitsu
- Applicant: Koji Iwamitsu
- Applicant Address: JP Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Volpe and Koenig, P.C.
- International Application: PCT/JP2010/005260 WO 20100826
- International Announcement: WO2012/025964 WO 20120301
- Main IPC: G06F12/00
- IPC: G06F12/00 ; G06F1/00
Abstract:
A storage system includes a controller that specifies a first virtual volume (VVOL) and a first RAID group (RG) of an electrical power saving target. The controller judges whether there is a first real area based on the first RG that is allocated to a second VVOL. If there is, the controller moves data in the first real area to a free real area based on a second RG other than the first RG, and executes a moving processing in which a real area based on the second RG is allocated, as a substitute for the first real area, to a virtual area to which the first real area is allocated. The controller sets all of physical storage devices (PDEVs) that configure the first RG to be in an electrical power saving state if there is no real area based on the first RG that is allocated to the second VVOL.
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