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:
Mar. 04, 2014
Filed:
Apr. 12, 2011
Takashi Itoyama, Odawara, JP;
Ikuya Yagisawa, Machida, JP;
Yoshifumi Mimata, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Deterioration of performance due to diagnosis processing performed when a failure occurs is prevented. A storage apparatusincludes a controllerA and a plurality of expandersA,A coupled to the controllerA to form a first system, and includes a controllerB and a plurality of expandersB,B coupled to the controllerB to form a second system. The controllerA accesses the storage drivethrough the expandersA,A, and the second controllerB accesses the storage drive through the expandersB,B. In the storage apparatus, the controllerA stores a maximum number (concurrently-executable maximum number) of communication portsthat are concurrently diagnosable in the first system, and repeatedly executes a process of selecting the communication portsnot exceeding the concurrently-executable maximum number and a process of causing the expandersA,A to diagnose the selected communication ports