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:
Aug. 04, 2009
Filed:
Dec. 28, 2004
Tsutomu Koga, Matsuda, JP;
Mitsuru Inoue, Hiratsuka, JP;
Tsutomu Koga, Matsuda, JP;
Mitsuru Inoue, Hiratsuka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
There are provided a cache region that stores write data from a host device, storage media, a data storage region for the storage media, and a comparison unit. A first comparison object is generated for N items of write data on the cache region and the N items of write data are transferred to the data storage region. Write data is read from a designated address of the data storage region and this write data is written to the storage media. When N items of write data have been read, a second comparison object is generated in respect of the write data. The comparison unit compares the first comparison object and the second comparison object, and if the result of the comparison is a mismatch, the N items of write data on the cache region are again transferred to the data storage region.