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:
Aug. 19, 2008
Filed:
Mar. 03, 2005
Takao Mashima, Fujisawa, JP;
Dai Taninaka, Odawara, JP;
Takao Mashima, Fujisawa, JP;
Dai Taninaka, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A storage control system having no risk of changing the storage content of a logical volume by a data update to a virtual logical volume. A logical volume, which is not correspondent to a virtual logical volume, can be specified when defining a virtual logical volume correspondent to a logical volume. A first storage controller comprises a port capable of connecting to both a logical volume of the first storage controller, and a logical volume of a second storage controller; a virtual logical volume, which is set in association with a logical volume connected to this port; and a virtual logical volume-setting controller for controlling the setting of a virtual logical volume. The virtual logical volume-setting controller is constituted such that the virtual logical volume cannot be set in a logical volume of the first storage controller.