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:
Jan. 21, 2014
Filed:
Feb. 07, 2012
Akira Sampei, Kawasaki, JP;
Tsunemichi Harada, Kawasaki, JP;
Hiroaki Sato, Kawasaki, JP;
Fumio Hanzawa, Kawasaki, JP;
Akira Sampei, Kawasaki, JP;
Tsunemichi Harada, Kawasaki, JP;
Hiroaki Sato, Kawasaki, JP;
Fumio Hanzawa, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
In a storage system, when power supply to HDDs is instantaneously interrupted, a spin up controller of a magnetic disk apparatus spins up the HDDs. On the other hand, based on a response for an access to the HDDs in the magnetic disk apparatus, when detecting that the HDDs as an access destination are spun down, a spin up controller of a control apparatus spins up the HDDs. When a certain number of the HDDs or more are spun down, a separate controller does not permit the magnetic disk apparatus to be used for a given length of time. While the magnetic disk apparatus is not permitted to be used, the HDDs are spun up by using the spin up controller of the magnetic disk apparatus.