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. 29, 2011
Filed:
Mar. 26, 2008
Toshihiko Tsunokawa, Kanagawa, JP;
Nobuhiro Kuwamura, Kanagawa, JP;
Masutaka Harada, Kanagawa, JP;
Yuhji Yokoe, Kanagawa, JP;
Takao Matsui, Kanagawa, JP;
Toshihiko Tsunokawa, Kanagawa, JP;
Nobuhiro Kuwamura, Kanagawa, JP;
Masutaka Harada, Kanagawa, JP;
Yuhji Yokoe, Kanagawa, JP;
Takao Matsui, Kanagawa, JP;
Hitachi Global Storage Technologies, Netherlands B.V., Amsterdam, NL;
Abstract
Embodiments of the present invention help to reduce the occurrence of read hard errors in a hard disk drive (HDD). According to one embodiment, a HDD rewrites data on all data tracks of a block M when the number of write operations to the block consisting of continuous plural data tracks. The HDD further rewrites data on continuous plural data tracks and adjacent to the block. Since the number of write operations is counted every block, a memory area to register the number of write operations can be reduced.