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:
Jan. 31, 2012
Filed:
Oct. 31, 2008
Takashi Amano, Yokohama, JP;
Yoichi Mizuno, Yokohama, JP;
Takashi Amano, Yokohama, JP;
Yoichi Mizuno, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Computer Peripherals Co., Ltd., Tokyo, JP;
Abstract
A second storage system (SS) comprises a plurality of tapes, a first storage device capable of performing random access at a rate higher than the tapes, and a virtual storage device emulating the first storage device. A first storage system (SS) comprises a second storage device and a third storage device that has the virtual storage device mapped therewith. The SSreserves a storage space on the first storage device and reads data from the tape corresponding to the virtual storage device into the storage space. The SSperforms copying between the second storage device and third storage device and, in this process, sends a command for access generated in the third storage device to the virtual storage device. When receiving the Access Command corresponding to the virtual storage device, the SSaccesses the storage space.