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:
Feb. 21, 2012
Filed:
Feb. 25, 2009
Pantas Sutardja, Los Gatos, CA (US);
Yuan Zheng, Fremont, CA (US);
Yong Huang, Fremont, CA (US);
Qiuliang Fu, Fremont, CA (US);
Pantas Sutardja, Los Gatos, CA (US);
Yuan Zheng, Fremont, CA (US);
Yong Huang, Fremont, CA (US);
Qiuliang Fu, Fremont, CA (US);
Marvell International Ltd., Hamilton, BM;
Abstract
A method and apparatus is described for reducing RRO in storage systems. A disc may be partitioned into a number of equally spaced sectors. An RRO profile may be individually obtained for each sector, a runout control algorithm may be applied to each sector to generate an RROC waveform for the sector to suppress the RRO, and sector RROC waveforms may be assembled into an RROC waveform for a whole revolution and saved in a memory buffer for feed-forward control. The RROC is performed in the time domain, and it may be adapted for each sector to reject the RRO disturbance.