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:
Nov. 24, 2009
Filed:
Sep. 29, 2005
Yuuji Hanaoka, Kawasaki, JP;
Toshiyuki Yoshida, Kawasaki, JP;
Yuichi Ogawa, Kawasaki, JP;
Terumasa Haneda, Kawasaki, JP;
Kazunori Masuyama, Kahoku, JP;
Yuuji Hanaoka, Kawasaki, JP;
Toshiyuki Yoshida, Kawasaki, JP;
Yuichi Ogawa, Kawasaki, JP;
Terumasa Haneda, Kawasaki, JP;
Kazunori Masuyama, Kahoku, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A file control system performing DMA (direct memory access) transfer is provided. The file control system includes file control devices, and each of the file control devices is provided between a host computer and an external storage device. A first file control device among the file control devices checks for errors in the data read from a memory, changes the error detection code added to the read data from a first error detection code to a second error detection code, changes at least a part of the data when an error is detected, and executes DMA-transfer of the data, which is changed or is not changed, to a second file control device of the transfer destination.