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:
Mar. 07, 2006
Filed:
May. 20, 2003
Yoshitaka Kawamura, Yokohama, JP;
Masaharu Iwanaga, Kamakura, JP;
Satoshi Miyazaki, Yamato, JP;
Naoki Hino, Tokyo, JP;
Yoshitaka Kawamura, Yokohama, JP;
Masaharu Iwanaga, Kamakura, JP;
Satoshi Miyazaki, Yamato, JP;
Naoki Hino, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A host computer and primary and secondary storage devices are connected as capable of communicating with each other via a network, the primary and secondary storage devices functioning as data storage means of the host computer. The host computer transmits data to be written and a write request Wa to the primary storage device in writing of data into the primary storage device and transmits the data to be written and a write request Wb to the secondary storage device at any point in time after the foregoing transmission. The primary storage device receives the write request Wa and stores the data to be written. The secondary storage device receives the write request Wb and stores the data to be written.