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. 01, 2008
Filed:
Nov. 15, 2005
Stephen Perlmutter, Lafayette, CO (US);
Thomas Melrose, Longmont, CO (US);
James Hargarten, Lafayette, CO (US);
Don Brunnett, Pleasanton, CA (US);
Lloyd Levy, San Jose, CA (US);
Adrián Cerdá, San Jose, CA (US);
Stephen Perlmutter, Lafayette, CO (US);
Thomas Melrose, Longmont, CO (US);
James Hargarten, Lafayette, CO (US);
Don Brunnett, Pleasanton, CA (US);
Lloyd Levy, San Jose, CA (US);
Adrián Cerdá, San Jose, CA (US);
Maxtor Corporation, Scotts Valley, CA (US);
Abstract
A disk drive measures the radial misposition of tracks and repositions the tracks at regularly spaced intervals. Written in runout (WRO) in servo bursts is determined to calculate track spacing and squeeze among adjacent tracks. Tracks with improper spacing are repositioned by adding a squeeze correction term to the servo wedges. Thereafter, when the disk drive operates to store data, the servo bursts are used to calculate a position error signal (PES), and the squeeze correction term is combined with the PES to position the head at a proper track radius.