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. 29, 2016
Filed:
Jun. 22, 2011
Takashi Iida, Tokyo, JP;
Takashi Iida, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
A storage device includes a plurality of magnetic disk devices each having a write cache, a processor unit that redundantly stores data, a rebuild execution control unit that performs a rebuild process, a write cache control unit that, at the time of the rebuild process, enables a write cache of a storage device that stores rebuilt data, and a rebuild progress management unit that is configured using a nonvolatile memory and manages progress information of the rebuild process. In the case where power discontinuity is caused during the rebuild process and then power is restored, the rebuild execution control unit calculates an address that is before an address of last written rebuilt data by an amount corresponding to the capacity of the write cache based on the progress information of the rebuild process managed by the progress management unit and resumes the rebuild process from that calculated address.