The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 11, 2014
Filed:
Aug. 26, 2010
Koji Iwamitsu, Odawara, JP;
Koji Iwamitsu, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
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.