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:
Feb. 15, 2011
Filed:
Feb. 09, 2007
Satoru Watanabe, Kokubunji, JP;
Yoshio Suzuki, Kokubunji, JP;
Shinji Fujiwara, Sagamihara, JP;
Nobuo Kawamura, Atsugi, JP;
Satoru Watanabe, Kokubunji, JP;
Yoshio Suzuki, Kokubunji, JP;
Shinji Fujiwara, Sagamihara, JP;
Nobuo Kawamura, Atsugi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A technology for verifying backup data capable of synchronizing timings of checksum calculation and verifying data consistency regardless of the storing position of the data is provided. In a backup system using a data update log, a checksum of data of a backup source and a checksum of backup data are checked, thereby verifying data consistency. Data check log generation means and the like are provided so that the data update log and the data check log are transmitted in order to a secondary site. By this means, the timings of the checksum calculation are synchronized. Further, by providing data area extraction means and the like, the verification of data consistency can be performed regardless of the storing position of the data.