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. 15, 2008
Filed:
Dec. 27, 2004
Satoshi Yagi, Ooi, JP;
Satoshi Yagi, Ooi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
This invention provides a storage apparatus which can avoid a data lost even when a short-circuit fault occurs in a power source line which is not made redundant for a plurality of hard disk drives. In the storage apparatus, a storage control unit comprises a host interface control unit, a disk interface control unit, a cache memory, and a data transfer unit, and a storage unit includes poly switches provided for each of the power source lines to a plurality of hard disk drives and a power source line monitor circuit for monitoring the voltage of the power source line. When the voltage abnormality due to a voltage drop of the power source line is detected by the power source line monitor circuit, a data line connecting the disk interface control unit and the plurality of hard disk drives is cut off.