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:
Nov. 06, 2007
Filed:
May. 24, 2001
Eiju Katsuragi, Tokyo, JP;
Toshio Nakano, Tokyo, JP;
Yoshinori Okami, Tokyo, JP;
Takao Satoh, Tokyo, JP;
Eiju Katsuragi, Tokyo, JP;
Toshio Nakano, Tokyo, JP;
Yoshinori Okami, Tokyo, JP;
Takao Satoh, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
During recovery of a master system, a mismatch between data in the master system and that in a backup system is obviated quickly to shorten time consumed before resumption of operation of the master system. The backup system controls, as second difference information, update data generated over a substitute operation period between occurrence of a disabled state of the master system and recovery thereof and when the master system is enabled to operate, a range of addition of first difference information inside the master system and the second difference information or only a range of the second difference information is copied to the master system to eliminate the data mismatch.