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:
Feb. 01, 2005
Filed:
Nov. 28, 2001
Kazuhiko Ikeuchi, Kawasaki, JP;
Mikio Ito, Kawasaki, JP;
Hidejiro Daikokuya, Kawasaki, JP;
Satomi Mamiya, Kawasaki, JP;
Yoshio Kitamura, Kawasaki, JP;
Minoru Muramatsu, Kawasaki, JP;
Hiroyuki Hoshino, Kawasaki, JP;
Kazuhiko Ikeuchi, Kawasaki, JP;
Mikio Ito, Kawasaki, JP;
Hidejiro Daikokuya, Kawasaki, JP;
Satomi Mamiya, Kawasaki, JP;
Yoshio Kitamura, Kawasaki, JP;
Minoru Muramatsu, Kawasaki, JP;
Hiroyuki Hoshino, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A RAID controller accesses an access request area on logical volumes distributed and stored on a plurality of physical disks according to a disk access request from a host. The controller has a plurality of management modules which are in-charge of plurality of the redundant groups respectively and issuing a logical format request for each area of said logical volume by referring to a management table for managing progress information of the logical format processing. Each management module has a plurality of the management table for being in-charge of said plurality of redundant groups and a queue for queuing the disk access request. The management module, according to the disk access request, judges whether all the access request areas have been logically formatted referring to the management table.