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:
Aug. 19, 2014
Filed:
Aug. 12, 2013
Applicant:
Hitachi, Ltd., Tokyo, JP;
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 12/02 (2006.01);
U.S. Cl.
CPC ...
G06F 12/023 (2013.01); G06F 12/0292 (2013.01); G06F 2212/1044 (2013.01);
Abstract
The storage control device of this invention allocates the physical storage area in RAID groups to virtual volumes in units of chunks including multiple pages. To the virtual volume, in accordance with write accesses from the host, the physical storage area in the pool is allocated. A RAID groupin the pool includes multiple chunks. Each chunkincludes multiple pages. To the virtual volume, the physical storage area is allocated in units of chunks. From the allocated chunks, the pagesrequired for writing write data are used.