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:
Oct. 09, 2012
Filed:
Aug. 03, 2010
Shinnosuke Matsuda, Kawasaki, JP;
Sadayuki Ohyama, Kawasaki, JP;
Kentaro Yuasa, Kawasaki, JP;
Takanori Ishii, Kawasaki, JP;
Yoko Kawano, Kawasaki, JP;
Yuji Hanaoka, Kawasaki, JP;
Nina Tsukamoto, Kawasaki, JP;
Tomoharu Muro, Kawasaki, JP;
Shinnosuke Matsuda, Kawasaki, JP;
Sadayuki Ohyama, Kawasaki, JP;
Kentaro Yuasa, Kawasaki, JP;
Takanori Ishii, Kawasaki, JP;
Yoko Kawano, Kawasaki, JP;
Yuji Hanaoka, Kawasaki, JP;
Nina Tsukamoto, Kawasaki, JP;
Tomoharu Muro, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A backup method makes a backup of cache data to a nonvolatile memory by using a controller, the cache data being stored in the volatile memory. The backup method includes writing the cache data stored in the volatility memory in a selected area of the nonvolatile memory, generating party data by operating the parity operations between each of the predetermined parts of the cache data in the volatile memory, verifying whether an error found in the part of the cache data in the nonvolatile memory can be recovered by using the parity data, and rewriting the part of the cache data when the error found in the part of the cache data in the nonvolatile memory cannot be recovered by using the parity data in an area of the nonvolatile memory different from the selected area.