Method and apparatus for runout correction during self-servo...

Details Method and apparatus for runout correction during self-servo... Method and apparatus for runout correction during self-servo...

2006-10-17

2006-10-17

Young, Wayne (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S031000, C360S327300, C360S077080

Reexamination Certificate

active

07123433

ABSTRACT:
A disk drive self-servo writes on a storage disk. Servo bursts are self-written along a track using a transducer, a position error signal (PES) indicating repeatable runout due (RRO) for the servo bursts is determined using a reference pattern, an embedded runout correction (ERC) value is calculated based on the PES and stored in a corresponding servo sector, and then the disk drive self-writes other servo bursts.

REFERENCES:
patent: 6091564 (2000-07-01), Codilian et al.
patent: 6519107 (2003-02-01), Ehrlich et al.
patent: 6549362 (2003-04-01), Melrose et al.
patent: 6751046 (2004-06-01), Szita et al.

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