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:
May. 06, 2008
Filed:
Jun. 30, 2005
Kazuhiko Ikeuchi, Kawasaki, JP;
Mikio Ito, Kawasaki, JP;
Hidejiro Daikokuya, Kawasaki, JP;
Shinya Mochizuki, Kawasaki, JP;
Hideo Takahashi, Kawasaki, JP;
Yoshihito Konta, Kawasaki, JP;
Yasutake Satou, Kawasaki, JP;
Hiroaki Ochi, Kawasaki, JP;
Tsukasa Makino, Kawasaki, JP;
Norihide Kubota, Kawasaki, JP;
Kazuhiko Ikeuchi, Kawasaki, JP;
Mikio Ito, Kawasaki, JP;
Hidejiro Daikokuya, Kawasaki, JP;
Shinya Mochizuki, Kawasaki, JP;
Hideo Takahashi, Kawasaki, JP;
Yoshihito Konta, Kawasaki, JP;
Yasutake Satou, Kawasaki, JP;
Hiroaki Ochi, Kawasaki, JP;
Tsukasa Makino, Kawasaki, JP;
Norihide Kubota, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
When a write-back request for writing back new data in a cache memory to disk devices forming a redundant configuration of RAID is generated, a write-back processing unit, reserves a parity buffer area in the cache memory, generates new parity, and then, writes the new data and the new parity to the corresponding disk devices. When an error in which the consistency of RAID is broken occurs in a plurality of the disk devices upon write performed by the write-back processing unit, a recovery processing unit reserves, in the cache memory, a cache stripe area storing data of the entire stripe including the new data which is to be written back, and causes the cache control unit to manage it.