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:
Dec. 15, 2009
Filed:
Aug. 08, 2008
Atsushi Ishii, Kawasaki, JP;
Hideo Takahashi, Kawasaki, JP;
Tatsuya Yanagisawa, Kawasaki, JP;
Hidefumi Kobayashi, Kawasaki, JP;
Hideo Masuda, Kawasaki, JP;
Rei Hirose, Kawasaki, JP;
Daisuke Miyazaki, Kawasaki, JP;
Atsushi Ishii, Kawasaki, JP;
Hideo Takahashi, Kawasaki, JP;
Tatsuya Yanagisawa, Kawasaki, JP;
Hidefumi Kobayashi, Kawasaki, JP;
Hideo Masuda, Kawasaki, JP;
Rei Hirose, Kawasaki, JP;
Daisuke Miyazaki, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A disk control apparatus performing input/output control of data of a storage disk device according to an input/output request from a host includes a cache memory which stores a part of the data and a management table which has format information for indicating whether a track of the storage disk device has been initialized to a predetermined track format for each track of the storage disk device. A control unit creates track format information of the predetermined track format referring to the management table when an input/output request is received from the host. A remote unit transfers initialization information of the management table to another disk control apparatus of a secondary center according to a copy instruction from the host. The control unit updates the format information of the target track in the management table to complete initialization of the target track.