Systems and methods for multipass servowriting with a null...

Details Systems and methods for multipass servowriting with a null... Systems and methods for multipass servowriting with a null...

2007-11-06

2007-11-06

Korzuch, William R. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S048000, C360S077010

Reexamination Certificate

active

11090608

ABSTRACT:
Embodiments of the present invention enables the trimming and writing of servo bursts in a null burst servo pattern as multiple portions in multiple passes while still demodulating each of the servo bursts as a single burst to obtain PES. Alternatively, the servo bursts can be trimmed and written using different currents in different passes respectively so that a gap can be created in the radial direction between the servo bursts. This description is not intended to be a complete description of, or limit the scope of, the invention. Other features, aspects, and objects of the invention can be obtained from a review of the specification, the figures, and the claims.

REFERENCES:
patent: 6738205 (2004-05-01), Moran et al.
patent: 2004/0123025 (2004-06-01), Chainer et al.

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