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. 27, 2011
Filed:
Jan. 29, 2009
Tsunehiro Arai, Yokohama, JP;
Michiaki Sekine, Kawasaki, JP;
Akira Matsui, Yokohama, JP;
Hiroshi Suzuki, Yokohama, JP;
Tsunehiro Arai, Yokohama, JP;
Michiaki Sekine, Kawasaki, JP;
Akira Matsui, Yokohama, JP;
Hiroshi Suzuki, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A host computer includes a virtual disk control part for controlling an input/output request into a virtual disk. A plurality of storage subsystems includes a load monitoring part for measuring a load on a physical disk by the input/output request and storing load information in a disk management table. The virtual disk control part identifies, upon receiving the input/output request into a not-ever-outputted space in a virtual disk, an appropriate logical disk on the virtual disk based on the load information in the disk management table, sends the input/output request to the storage subsystem having the identified logical disk, and updates, upon receiving a completion acknowledgement of the input/output request, the load information in the disk management table based on the load information in the logical disk map information table.