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:
Jan. 23, 2001
Filed:
Sep. 25, 1998
Shawn A. Wakefield, Norman, OK (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
A method is disclosed for optimizing write performance of a disc drive through the selection of optimum write thresholds. The disc drive has a controllably positionable head adjacent tracks defined on a recording surface of a rotatable disc. A narrow head detection test is first applied whereby data are written to a selected track while maintaining the head at a first off-track center distance. The data are read while maintaining the head at a position nominally over the center of the selected track and measuring resulting read error performance. These steps are then repeated using a second off-track center distance. A wide head detection test is next applied, by writing data to the selected track while maintaining the head over the center of the selected track, writing data to an adjacent track abutting the selected track while maintaining the head at a third off-track center distance, and reading the data while maintaining the head over the center of the selected track and measuring resulting read error performance. These steps are then repeated using a fourth off-track center distance. The optimum write thresholds are thereafter selected from the measured read error rates.