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:
Jul. 07, 2009
Filed:
Jan. 31, 2005
Kazuo Nakashima, Kawasaki, JP;
Osamu Kimura, Kawasaki, JP;
Koji Uchida, Kawasaki, JP;
Akihito Kobayashi, Kawasaki, JP;
Kazuo Nakashima, Kawasaki, JP;
Osamu Kimura, Kawasaki, JP;
Koji Uchida, Kawasaki, JP;
Akihito Kobayashi, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A disk array device having a plurality of hard disk units has a large-capacity memory mounted on a controller module which controls the whole device. The large-capacity memory has a system area managed by an OS and a cache area serving as a cache memory, and in addition, it has a table area which stores management/control information of the device and whose area size is changeable at an arbitrary instance. Therefore, it is possible to change the table area according to the state of the device in an active state without ON/OFF of a power source, so that an area not in use in the table area can be released for use as the cache memory. This makes it possible to appropriately varying the sizes of the table area and the cache area in an active state while the device is in operation, thereby realizing effective use of the large-capacity memory.