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:
Dec. 29, 2009
Filed:
Apr. 30, 2008
Toru Tanaka, Kawasaki, JP;
Yuichi Taguchi, Sagamihara, JP;
Fumi Miyazaki, Kawasaki, JP;
Yasunori Kaneda, Sagamihara, JP;
Toru Tanaka, Kawasaki, JP;
Yuichi Taguchi, Sagamihara, JP;
Fumi Miyazaki, Kawasaki, JP;
Yasunori Kaneda, Sagamihara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A first storage system includes a first storage area for storing data written by a computer. A second storage system includes a second storage area to which the data stored in the first storage area migrates. A third storage system includes a virtual storage area corresponding to the second storage area. An access request to the virtual storage area is converted into an access request to the second storage area to be issued. A management computer transmits, to the third storage system, an instruction to migrate the data of the second storage area to a third storage area of the third storage system based on a determination result between a value of the data migrated to the second storage area and a predetermined threshold value.