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:
Dec. 16, 2008
Filed:
Sep. 29, 2005
Toshikazu Ueki, Kawasaki, JP;
Takaharu Ishizuka, Kawasaki, JP;
Takao Matsui, Kawasaki, JP;
Makoto Hataida, Kawasaki, JP;
Yuka Hosokawa, Kawasaki, JP;
Toshikazu Ueki, Kawasaki, JP;
Takaharu Ishizuka, Kawasaki, JP;
Takao Matsui, Kawasaki, JP;
Makoto Hataida, Kawasaki, JP;
Yuka Hosokawa, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A dual storage apparatus is provided that comprises a first and a second memories for respectively retaining a set of identical data and a selector for selecting either of the two (2) sets of the data respectively read from the first and the second memory based on a read control signal inputted into the selector, having a request management unit for, when the read control signal has been inputted, attaching an identifier for identifying the read control signal to the inputted read control signal and outputting the signal and the identifier; and a plurality of memory control units for each of the first and the second memories. The dual storage apparatus detects a synchronization error by verifying coincidence of the identifier attached by the request management unit and controls the selector such that the data from a system from which no synchronization error has been detected.