Redundant servo pattern stamper

Details Redundant servo pattern stamper Redundant servo pattern stamper

2005-09-06

2005-09-06

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

Record copying

Contact transfer

C360S015000, C360S017000, C369S013010, C369S014000

Reexamination Certificate

active

06940667

ABSTRACT:
A plurality of redundant sets of servo data are recorded on a magnetic hard disk. The set meeting a predetermine criteria is employed when the hard disk is assembled into a hard disk drive. The determination of which set has the criteria may be conducted by the disk drive itself. The criteria may include a determination the set of servo data having meeting a minimum quality criteria or the fewest errors. The criteria may include a selection of a set of servo data having a specific pattern where the prerecorded sets may comprise a differing servo patterns that may be used by disk drives requiring specific servo patterns. The servo data are printed onto the hard disk by means of a stamper or mask having all the sets of servo data.

REFERENCES:
patent: 6304407 (2001-10-01), Baker et al.
patent: 6359747 (2002-03-01), Kuo
patent: 6643082 (2003-11-01), Belser
patent: 6757116 (2004-06-01), Curtiss et al.
patent: 6813105 (2004-11-01), Takano
patent: 1073043 (2001-01-01), None
patent: 63032772 (1988-02-01), None
patent: 10027443 (1998-01-01), None

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