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:
Oct. 02, 2012
Filed:
Jun. 03, 2010
Mihoko Wada, Kawasaki, JP;
Mihoko Wada, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A storage device includes storage units, a management section that manages a logically defined storage area as a real logical volume by associating the storage area with a physical storage area created using the storage units in advance and manages the logically defined storage area as a virtual logical volume by associating the storage area with a physical storage area when data is added, a determination section that determines whether the activity ratio of the virtual logical volume exceeds a threshold and whether the physical storage area associated with a storage area of the virtual logical volume is managed by another control unit, and a migration section that migrates data stored in the virtual logical volume to a real logical volume when the activity ratio exceeds the threshold and the physical storage area associated with the storage area of the virtual logical volume managed by another control unit.