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. 28, 2011
Filed:
Oct. 27, 2008
Applicants:
Yoshiaki Eguchi, Machida, JP;
Kazuhiko Mogi, Yokohama, JP;
Yasutomo Yamamoto, Sagamihara, JP;
Takashi Oeda, Sagamihara, JP;
Kouji Arai, Odawara, JP;
Inventors:
Yoshiaki Eguchi, Machida, JP;
Kazuhiko Mogi, Yokohama, JP;
Yasutomo Yamamoto, Sagamihara, JP;
Takashi Oeda, Sagamihara, JP;
Kouji Arai, Odawara, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A host and a storage system each keep a shared identifier indicating a state of a system. The storage system acquires, at update of data, a data pair including data for a change through processing of the host and data before the update. The storage system relates the data pair to a shared identifier. When the host indicates an identifier, the storage system restores data using the data pair.