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. 07, 2012
Filed:
Feb. 18, 2009
Takashi Kawada, Kawasaki, JP;
Hirotomo Tokoro, Kawasaki, JP;
Yoshinari Shinozaki, Kawasaki, JP;
Koji Uchida, Kawasaki, JP;
Takashi Kawada, Kawasaki, JP;
Hirotomo Tokoro, Kawasaki, JP;
Yoshinari Shinozaki, Kawasaki, JP;
Koji Uchida, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
Pre-update data is copied from a first storage device onto a second storage device in response to an update instruction to update data on the backup target volume on the first storage device. A copy status of each data on the backup target volume is managed with position information of the data mapped thereto. If bad data is present in the data on the backup target volume, the position information indicating the position of the bad data is searched. In accordance with the copy status managed with the position information mapped thereto, it is determined whether the pre-update data of the bad data is stored on the second storage device.