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:
Jul. 14, 2009
Filed:
Mar. 17, 2006
Hidejirou Daikokuya, Kawasaki, JP;
Mikio Ito, Kawasaki, JP;
Kazuhiko Ikeuchi, Kawasaki, JP;
Shinya Mochizuki, Kawasaki, JP;
Hideo Takahashi, Kawasaki, JP;
Yoshihito Konta, Kawasaki, JP;
Yasutake Sato, Kawasaki, JP;
Hiroaki Ochi, Kawasaki, JP;
Tsukasa Makino, Kawasaki, JP;
Norihide Kubota, Kawasaki, JP;
Hidejirou Daikokuya, Kawasaki, JP;
Mikio Ito, Kawasaki, JP;
Kazuhiko Ikeuchi, Kawasaki, JP;
Shinya Mochizuki, Kawasaki, JP;
Hideo Takahashi, Kawasaki, JP;
Yoshihito Konta, Kawasaki, JP;
Yasutake Sato, Kawasaki, JP;
Hiroaki Ochi, Kawasaki, JP;
Tsukasa Makino, Kawasaki, JP;
Norihide Kubota, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A RAID system access a physical disk and perform Rebuild/Copy back processing according to a host I/O request, so as to implement high-speed Rebuild/Copy back processing without interfering with the processing of a normal I/O. When one disk device fails, out of a plurality of disk devices constituting a RAID configuration, the controller performs Rebuild/Copy back processing to reconstruct the RAID. In Rebuild/Copy back, the controller reads the data from one disk and writes the data to another disk, so the presence of a normal I/O is judged, and when a normal I/O is absent, read and write of these different disk drives are executed simultaneously. By this, the Rebuild/Copy back time can be decreased.