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. 22, 2014
Filed:
Oct. 31, 2011
Katsumi Hirezaki, Odawara, JP;
Nobuyuki Saika, Yokosuka, JP;
Katsumi Hirezaki, Odawara, JP;
Nobuyuki Saika, Yokosuka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Data is managed efficiently by switching between block level hierarchical control and file level hierarchical control according to file characteristics. A storage apparatus which is connected via a network to a host computer which requests data writing comprises storage media of a plurality of types of varying performance, a volume management unit which manages storage areas provided by the storage media of the plurality of types as different storage tiers and manages storage tiers of the same type or different types as a pool and provides predetermined areas of the pool to the host computer as volumes, and a file management unit which constructs file systems, for managing data in file units configured from a plurality of blocks, in the volumes, and receives file unit data write requests from the host computer.