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:
Apr. 17, 2012
Filed:
Apr. 03, 2008
Hitoshi Fukuguchi, Odawara, JP;
Hitoshi Fukuguchi, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
This storage system includes a server management unit for managing in a server a maximum overwrite count and an overwrite count for overwriting the overwrite data in a disk cache, a controller cache for temporarily storing overwrite data sent from the server in the storage subsystem, a storage management unit for managing a maximum overwrite count and an overwrite count for overwriting overwrite data sent from the server in the controller cache so as to overwrite overwrite data sent from the controller cache in the hard disk drive according to the number of the maximum overwrite count, and an address management unit for managing the respective addresses of the disk cache, the controller cache and the hard disk drive storing the same file to be erased.