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:
Nov. 20, 2007
Filed:
Jun. 28, 2005
Masaaki Hosouchi, Kanagawa, JP;
Kenichi Oyamada, Kanagawa, JP;
Naoko Ikegaya, Kanagawa, JP;
Nobuhiro Maki, Kanagawa, JP;
Masaaki Hosouchi, Kanagawa, JP;
Kenichi Oyamada, Kanagawa, JP;
Naoko Ikegaya, Kanagawa, JP;
Nobuhiro Maki, Kanagawa, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Related plural logical volumes can be used after switching over from the host computer therein. A switching command, which a host computer sends, makes a storage device search for a switching target volume, from the volume tables, that is identical to identification information of the switching target volume received among switching target candidate volumes that form a volume pair relation with the switching source volume. The storage device memorizes an intra-host ID of the switching target volume and an intra-storage ID of the switching target volume in a switching table with a correspondence there between. The storage device acquires the intra-storage ID of the switching target volume in reference to the switching table in the case of receiving an access request, such that the intra-host ID of the switching source volume is used as a key, and executes switching to access to the switching target volume.