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:
Oct. 13, 2009
Filed:
May. 16, 2008
Applicants:
Shuichi Yagi, Matsuda, JP;
Dai Taninaka, Odawara, JP;
Takao Mashima, Fujisawa, JP;
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 13/00 (2006.01); G06F 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention uses memory resources effectively and connects each storage device by a plurality of paths in a switchable manner, thus improving reliability and ease of use, by virtualizing external memory resources as internal memory resources. External storageis connected to the main storage, and the actual volumeA is mapped onto the virtual volumeA. A plurality of paths is connected between the storageand. When a failure occurs in a path in use (S), the path having the next highest priority is selected (S), and processing is continued using this path (S).