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. 11, 2012
Filed:
Feb. 01, 2012
Nobuhiro Maki, Yokohama, JP;
Kenichi Oyamada, Yokohama, JP;
Kazuhiko Watanabe, Yokohama, JP;
Masaaki Hosouchi, Zama, JP;
Nobuhiro Maki, Yokohama, JP;
Kenichi Oyamada, Yokohama, JP;
Kazuhiko Watanabe, Yokohama, JP;
Masaaki Hosouchi, Zama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A computer system and method which stores path definition information including a storage ID, a volume ID, and validities of paths between a host computer and a first or second storage system identified by the storage ID for accessing a volume identified by the volume ID in one of the storage systems, sends an I/O request via the paths, based on the path definition information, receives information indicating the storage and volume IDs, and updates the path definition information. During initial copying from the second to the first volume, validity corresponding to a first path is set to 'Invalid' and validity corresponding to a second path is set to 'Valid'. After completion of initial copying, the validity corresponding to the first path included in the path definition information is changed to “Valid.”