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. 16, 2005
Filed:
Nov. 07, 2002
Akira Tokizono, Kanagawa-ken, JP;
Shiroh Aono, Kanagawa-ken, JP;
Shunichiro Ota, Tokyo, JP;
Toshiro Unoki, Yokohama, JP;
Minoru Hashimoto, Fujisawa, JP;
Akira Tokizono, Kanagawa-ken, JP;
Shiroh Aono, Kanagawa-ken, JP;
Shunichiro Ota, Tokyo, JP;
Toshiro Unoki, Yokohama, JP;
Minoru Hashimoto, Fujisawa, JP;
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
In a hard disk drive where data is read from and written to a magnetic disk by a magnetic head in accordance with a command from a host computer, a moving distance of the magnetic head in a radial direction is detected within a predetermined period of time. The magnetic head is moved for seeking by a predetermined distance when the moving distance detected is small. The system and method of the present invention reduces write failures due to the undulation of a lubricant film on the magnetic disk by effectively preventing undulation.