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:
Sep. 17, 2013
Filed:
Aug. 10, 2011
Jiangang Liang, San Jose, CA (US);
Siri S. Weerasooriya, Campbell, CA (US);
Yun Hong, San Jose, CA (US);
Yilin Cai, Fremont, CA (US);
Jiangang Liang, San Jose, CA (US);
Siri S. Weerasooriya, Campbell, CA (US);
Yun Hong, San Jose, CA (US);
Yilin Cai, Fremont, CA (US);
Western Digital Technologies, Inc., Irvine, CA (US);
Abstract
A method is disclosed of servo writing a disk drive comprising a first head actuated over a first disk surface, and a second head actuated over a second disk surface. A first repeatable runout (RRO) of the first disk surface is measured, and a seek is performed to seek the first head over the first disk surface in response to the measured first RRO while writing a first spiral track to the second disk surface using the second head. As a result, the first spiral track comprises a second RRO that substantially matches the first RRO of the first disk surface.