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:
Aug. 19, 2014
Filed:
Jul. 31, 2012
Masahiro Yoshida, Kawasaki, JP;
Tadashi Matsumura, Kawasaki, JP;
Masahiro Yoshida, Kawasaki, JP;
Tadashi Matsumura, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A RAID group control device for performing access control over one or more RAID groups each having redundancy. The RAID group control device includes an acquiring unit to acquire access frequency information with respect to a RAID group among the one or more RAID groups; a scheduling unit to find a time period exhibiting a lower access frequency than access frequencies of anterior and posterior time periods in a specified time range on the basis of the access frequency information, and to determine start timing of a process of rewriting firmware of drives belonging to the RAID group on the basis of the found time period; and a firmware rewrite processing unit to start the process of rewriting the firmware of the drives at the determined start timing.