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:
Jan. 24, 2012
Filed:
Apr. 22, 2008
Toru Suzuki, Odawara, JP;
Yusuki Hirakawa, Odawara, JP;
Yoshihiro Asaka, Odawara, JP;
Shuji Kondo, Odawara, JP;
Toru Suzuki, Odawara, JP;
Yusuki Hirakawa, Odawara, JP;
Yoshihiro Asaka, Odawara, JP;
Shuji Kondo, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A first storage subsystemA includes a first storage deviceAand one or more second storage devicesAA. A second storage subsystemB includes a third storage deviceBand a fourth storage deviceB. A third storage subsystemC comprises a fifth storage deviceCand a sixth storage deviceC. The first storage subsystemA generates a data set comprising an update number expressing the update order of the first storage deviceAand write data stored in the first storage deviceA, stores the generated data set in the one or more second storage devicesAA, and transmits the data set to the second and third storage subsystemsB,C. Each of the second and third storage subsystemsB,C stores the received data set in the third storage deviceBor fifth storage deviceC, reads a data set from the third or fifth storage deviceBCaccording to the update number, and stores the write data within the data set in the fourth storage deviceBor sixth storage deviceC