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:
Apr. 09, 2013
Filed:
Mar. 31, 2009
Kyoko Miwa, Kawasaki, JP;
Nobuyuki Osaki, Yokohama, JP;
Masayasu Asano, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A storage system for controlling attributes for data stored in virtual storage areas includes a logical storage area management unitthat manages the linking of virtual storage areas and attributes such as encryption attributes to logical storage area groups. When receiving a command to change an attribute of a virtual storage area or virtual volume, the logical storage area management unit determines the presence or absence of a unit logical storage area in a logical storage area group or pool linked to a different attribute and that is not yet allocated to a virtual storage area. The logical storage area management unit links a unit logical storage area determined to be present to a virtual storage area, reads data stored in the unit logical storage area linked to a virtual storage area subjected to an attribute change, and stores the read data in accordance with the different attribute.