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. 16, 2013
Filed:
May. 25, 2011
Yoshiaki Eguchi, Machida, JP;
Kazuhiko Mogi, Yokohama, JP;
Yasutomo Yamamoto, Sagamihara, JP;
Takashi Oeda, Sagamihara, JP;
Kouji Arai, Odawara, JP;
Yoshiaki Eguchi, Machida, JP;
Kazuhiko Mogi, Yokohama, JP;
Yasutomo Yamamoto, Sagamihara, JP;
Takashi Oeda, Sagamihara, JP;
Kouji Arai, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The storage system is coupled to a computer and includes a plurality of physical storages being used to configure a first logical storage and a second logical storage, a control unit receiving a read request and a write request from the computer; and a cache memory storing data which is sent to the computer. The control unit determines whether a request from the computer is a write request or a read request. If it is a read request, the control unit reads data from the cache memory or at least one of the plurality of physical storages based on the read request. If it is a write request, the control unit determines whether destination of the write request is the first logical storage.