Method and apparatus for runout correction by proper...

Details Method and apparatus for runout correction by proper... Method and apparatus for runout correction by proper...

2005-12-20

2005-12-20

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S077040

Reexamination Certificate

active

06977792

ABSTRACT:
A method and system for self-writing track locations of a data disk in a disk drive in order to reduce overall track runout are disclosed. First set of servo bursts are self-written along a track via a transducer, and repeatable runout correction values for the first servo bursts are calculated. Then, second servo bursts are self-written along the track via the transducer such that the first and second servo bursts form a plurality of servo sector patterns that define the track centerline, wherein the second servo bursts are positioned using said correction values to essentially compensate for the runout in the first servo bursts and reduce the overall track runout.

REFERENCES:
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patent: 6519107 (2003-02-01), Ehrlich et al.
patent: 6549362 (2003-04-01), Melrose et al.
patent: 6714376 (2004-03-01), Brunnett et al.
patent: 6751046 (2004-06-01), Szita et al.
patent: 6785084 (2004-08-01), Szita
Hargarten et al., “Method and Apparatus for Determining Embedded Runout Correction Values Using Feedback,” U.S Appl. No. 10/318,316, filed Dec. 11, 2002.
Ehrlich et al., “Method and Apparatus for Providing Variable Gain Iterative Embedded Runout Correction in a Disk Drive,” U.S. Appl. No. 10/410,576, filed Apr. 8, 2003.

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