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:
Jul. 05, 2011
Filed:
Mar. 25, 2009
Koutarou Sasage, Kawasaki, JP;
Koutarou Sasage, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A method for controlling a switch apparatus connected to a first and a second storage apparatus, and a host, the switch apparatus managing a virtual storage area maintained by the first and second storage apparatuses, the host accessible to the virtual storage area by transmitting a command for identifying a subarea of the virtual storage area, the second storage apparatus allowable to an access faster than the first storage apparatus does, the method includes: receiving a command; determining which of the first and second storage apparatuses maintains the subarea to be accessed; accessing the subarea corresponding to the command; detecting a frequency of access to each of the subareas; and moving data stored in the first storage apparatus and having higher frequency of access than data stored in the second storage apparatus into the subareas maintained in the second storage apparatus.