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:
May. 10, 2011
Filed:
May. 24, 2007
Toshiroh Unoki, Kanagawa, JP;
Minoru Hashimoto, Kanagawa, JP;
Toru Aida, Kangawa, JP;
Naoki Tajima, Kanagawa, JP;
Hiroshi Kawanobe, Kanagawa, JP;
Toshiroh Unoki, Kanagawa, JP;
Minoru Hashimoto, Kanagawa, JP;
Toru Aida, Kangawa, JP;
Naoki Tajima, Kanagawa, JP;
Hiroshi Kawanobe, Kanagawa, JP;
Hitachi Global StorageTechnologies, Netherlands B.V., Amsterdam, NL;
Abstract
Embodiments in accordance with the present invention help a disk drive to effectively cope with a data address mark detection error. In one embodiment, a data sector is provided with plural data address marks and an read/write (RW) channel reads out the data sector using part of those data address marks. Each divisional section of a split sector has two data address marks and the RW channel uses one of the two data address marks. A data address mark to be used is specified by a register. When an error occurs in detecting a data address mark, its position is stored in a register. Based on the error position, an error recovery processing section stores, in the register, a data address mark to be used in a next retry.