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. 10, 2007
Filed:
Oct. 02, 2002
Nobuhiro Maki, Sagamihara, JP;
Naoko Iwami, Sagamihara, JP;
Hiroshi Yamada, Kawasaki, JP;
Hiroshi Kurokawa, Hadano, JP;
Nobuhiro Maki, Sagamihara, JP;
Naoko Iwami, Sagamihara, JP;
Hiroshi Yamada, Kawasaki, JP;
Hiroshi Kurokawa, Hadano, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A computing system and an exclusive access control method are provided for preventing degraded performance of a network caused by exclusive access control, and for permitting a computer to exclusively access a storage area irrespective of whether a storage has an exclusive access control function. In the computing system in which a plurality of computers and an external storage device storing shared data are connected through a relay, exclusive access control is executed by a device other than the storage. Specifically, the relay having a virtualizing function is instructed to execute exclusive access control. The relay has information indicating whether a storage area on the storage is an exclusive access area, so that the relay determines based on this information whether an access request received from a computer requests an access to an exclusive access area, and executes exclusive access control when it is an access request.