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. 17, 2010
Filed:
Sep. 29, 2006
Koichi Tsukada, Kawasaki, JP;
Satoshi Yazawa, Kawasaki, JP;
Shoji Oshima, Kawasaki, JP;
Tatsuhiko Machida, Kawasaki, JP;
Hirokazu Matsubayashi, Kawasaki, JP;
Koichi Tsukada, Kawasaki, JP;
Satoshi Yazawa, Kawasaki, JP;
Shoji Oshima, Kawasaki, JP;
Tatsuhiko Machida, Kawasaki, JP;
Hirokazu Matsubayashi, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
For each RAID group to be determined for blocking, each disk is classified into three types of totalization unit based on the status of each disk belonging to the RAID group or the presence/absence of an access path to each disk, and the number of disks corresponding to each totalization unit is totalized. The totalization unit is a 'used disk', an 'unused disk', and a “loop-down disk”. The totalization result is compared with the threshold condition set for each RAID level (for example, “unused disk”=0 and “loop-down disk”='1 or more'), and the blocking possibility is determined.