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. 01, 2014
Filed:
Jun. 07, 2011
Taro Ishizaki, Odawara, JP;
Toshihiko Shinozaki, Odawara, JP;
Hideki Nagasaki, Odawara, JP;
Daisuke Komaki, Odawara, JP;
Taro Ishizaki, Odawara, JP;
Toshihiko Shinozaki, Odawara, JP;
Hideki Nagasaki, Odawara, JP;
Daisuke Komaki, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A suitable Tier ratio is determined according to the I/O performance and I/O characteristic of a virtual volume. A storage apparatus which is connected via a network to a host computer which requests data writing comprises storage devices of a plurality of types of varying performance; and a controller which manages storage areas provided by each of the storage devices of a plurality of types by means of storage tiers of a plurality of different types, and which assigns the storage areas in page units to virtual volumes from any of the storage tiers among the storage tiers of the plurality of types according to the data write request from the host computer, wherein the controller monitors performance information which includes I/O characteristic information for each of the virtual volumes and determines the storage tiers corresponding to the performance information thus monitored, and assigns the storage areas in page units to the virtual volumes from the determined storage tiers.