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:
Sep. 20, 2011
Filed:
Apr. 04, 2008
Yuichi Taguchi, Sagamihara, JP;
Masayuki Yamamoto, Sagamihara, JP;
Hiroshi Nasu, Yokohama, JP;
Noriko Nakajima, Machida, JP;
Yuichi Taguchi, Sagamihara, JP;
Masayuki Yamamoto, Sagamihara, JP;
Hiroshi Nasu, Yokohama, JP;
Noriko Nakajima, Machida, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
There is provided a computer system comprising a first storage system and a second storage system coupled to the first storage system. The first storage system provides a first storage area. The second storage system provides a second storage area. The second storage system reads and writes the requested data from and to the first storage area associated with the second storage area; specifies the first storage area associated with the second storage area from which the data is to be erased upon reception of a request for erasing the data stored in the second storage area; and transmits the request for erasing the data to the first storage system providing the specified first storage area. The first storage system erases the data stored in the specified first storage area, based on a data erasure condition included in the request for erasing the data.