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:
Sep. 06, 2011
Filed:
Feb. 11, 2009
Atsushi Igashira, Kawasaki, JP;
Hideo Takahashi, Kawasaki, JP;
Yoshihito Konta, Kawasaki, JP;
Norihide Kubota, Kawasaki, JP;
Atsushi Igashira, Kawasaki, JP;
Hideo Takahashi, Kawasaki, JP;
Yoshihito Konta, Kawasaki, JP;
Norihide Kubota, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
According to an aspect of an embodiment, a method for controlling a controller connected to a plurality of storage units storing data, the controller including a cache and a buffer, the method comprising the steps of: storing data in the cache; generating parity data corresponding to the data and storing the parity data in the buffer; writing the data and the parity data into the plurality of the storage units; comparing the parity data stored in the buffer with the parity data written into and read out from at least one of the storage unit; deleting, when the parity data stored in the buffer is different from the parity data read out from the storage unit, the parity data from the buffer; and regenerating parity data from data stored in the cache and rewriting the regenerated parity data into at least one of the storage unit.