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. 31, 2004
Filed:
Jun. 19, 2002
Wataru Katsurashima, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a storage system, a plurality of logical disks are constituted by combining a plurality of physical disks. A logical disk management unit converts input/output (I/O) requests addressed to the logical disks into I/O requests addressed to corresponding physical disks, and outputs the converted I/O requests. A physical disk management unit accesses the corresponding physical disks in accordance with the I/O requests which are output from the logical disk management unit and addressed to the physical disks. A logical disk relocation control unit relocates the logical disks so as to set the busy rates of the physical disks within a range between the first state in which the ratio of the busy rates of the physical disks is equal to the ratio of the I/O processing performance values of the physical disks, and the second state in which the busy rates of the physical disks are leveled. A data relocation method is also disclosed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile