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:
Nov. 04, 2014
Filed:
Jul. 10, 2013
Hitachi Ltd., Tokyo, JP;
Akira Yamamoto, Sagamihara, JP;
Noboru Morishita, Yokohama, JP;
Hideo Saito, Yokohama, JP;
Yoshiaki Eguchi, Yokohama, JP;
Masayuki Yamamoto, Sagamihara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A storage system includes a first storage apparatus and a second storage apparatus. The first storage apparatus includes a capacity pool that is partitioned into multiple pool pages and includes a storage area of an external logical volume provided by at least one storage apparatus. The second storage apparatus provides first virtual volume which is a virtual logical volume comprising multiple first virtual areas. In a case of receiving a write request from the computer to a virtual area in the first virtual volume to which a page is not allocated, an unallocated pool page of the external logical volume is allocated to the virtual area. An authority to allocate the unallocated pool page of the external logical volume is assigned to the first storage apparatus.