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:
Feb. 08, 2005
Filed:
May. 05, 2004
Isamu Kurokawa, Tokyo, JP;
Hiroaki Nakanishi, Tokyo, JP;
Masaru Tsukada, Tokyo, JP;
Hisaharu Takeuchi, Tokyo, JP;
Masahiro Kawaguchi, Odawara, JP;
Isamu Kurokawa, Tokyo, JP;
Hiroaki Nakanishi, Tokyo, JP;
Masaru Tsukada, Tokyo, JP;
Hisaharu Takeuchi, Tokyo, JP;
Masahiro Kawaguchi, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
There is provided a data processing system which, from a point of view of increasing process efficiency of the entire data processing system to exhibit a maximum effect, may assign an alias device to a logic device. The data processing system of this invention comprises a host processing device () and a storage control device () connected thereto via a communication means (), where the storage control device () has a deciding means for deciding, at a time of processing an I/O request of a certain base device, whether there is a need to newly assign an alias device to the base device according to a use situation of a physical device (). When assignment is decided as necessary, the host processing device () is notified of such via the communication means, and the host processing device () newly assigns an alias device to the base device when there is the notification from the storage control device ().