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:
Jun. 18, 2013
Filed:
Jan. 14, 2010
Taro Ishizaki, Odawara, JP;
Katsuyoshi Suzuki, Odawara, JP;
Taro Ishizaki, Odawara, JP;
Katsuyoshi Suzuki, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The storage system is coupled to a host apparatus and includes a plurality of storage devices, each of which includes a plurality of real pages, and a controller. The controller is configured to: manage the plurality of storage devices as a pool; provide a virtual volume to the host apparatus, the virtual volume including a plurality of virtual pages to each of which a portion of the pool is allocated in accordance with a write command; distribute data written in a first virtual page to a first group of real pages, the first group of real pages making up a redundant array and being selected from different storage devices; and migrate data stored in a first real page, which is a real page of the first group and belongs to a first storage device, to another storage device without migrating data stored in another real page of the first group.