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:
Feb. 09, 2016
Filed:
Dec. 21, 2012
Hitachi, Ltd., Tokyo, JP;
Yoshiki Kano, Sunnyvale, CA (US);
Akira Yamamoto, Kanagawa-ken, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A storage system, coupled to an external storage system, manages a virtual volume, such as a thin provision volume. The storage system also manages a first logical device created by using storage area of internal storage devices and a second logical device created by using storage area of external storage devices in the external storage system. A storage area in the first logical device or the second logical device is allocated to the virtual volume after receiving a write request to the virtual volume. The storage system has advantage that a storage area in the first logical device and the second logical device can be managed uniformly in thin provisioning function of the storage system.