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:
Jul. 17, 2018
Filed:
Mar. 13, 2014
Hitachi, Ltd., Tokyo, JP;
Naoyuki Masuda, Tokyo, JP;
Hiroshi Nasu, Tokyo, JP;
Tomohiro Kawaguchi, Tokyo, JP;
Takahiro Kito, Tokyo, JP;
Koji Nagata, Tokyo, JP;
Ran Ogata, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The access from a host computer to a storage system is continued before and after data migration in the storage system. A first controller allocates a first logical storage area to a specific virtual storage area, stores first association information indicating the specific virtual storage area and the first logical storage area, and sends the first association information to the host computer. The first controller and the second controller perform data migration from the first logical storage area to a second logical storage area. The first controller releases the first logical storage area from the specific virtual storage area and reflects the release in the first association information. The second controller allocates the second logical storage area to the specific virtual storage area, stores second association information indicating the specific virtual storage area and the second logical storage area, and sends the second association information to the host computer.