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:
Aug. 24, 2010
Filed:
Apr. 09, 2007
Kenichi Miki, Odawara, JP;
Kenichi Miki, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a computer system where a site including a storage device system connected to high-rank apparatuses, via a network such as a SAN, and a site including a storage device system similarly connected to high-rank apparatuses via a network are connected to each other via an inter-high-rank-apparatuses network, arbitration-emulation software is installed in each of the high-rank apparatuses. A two-step arbitration is performed, thereby determining one high-rank apparatus. At first, a shared/exclusive control using an already-existing shared volume is performed based on an arbitration conducted within the site. Next, a shared/exclusive control based on an arbitration conducted between the sites is performed by high-rank apparatuses each of which has won the arbitration within each site.