Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2006-01-31
2006-01-31
Hudspeth, David (Department: 2651)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
Reexamination Certificate
active
06992848
ABSTRACT:
A method of writing product servo bursts to a disk in a disk drive is disclosed. An external spiral servo writer comprising a head positioning pin and head positioning mechanics periodically writes a plurality of reference servo bursts in a plurality of spiral reference patterns to the disk. The reference servo bursts in the spiral reference patterns are processed to write product servo bursts to the disk. In one embodiment control circuitry within the disk drive processes the reference servo bursts to self-servo write the disk drive, and in another embodiment an external product servo writer processes the reference servo bursts to write the product servo bursts to the disk. In one embodiment, a slope of each spiral reference pattern is selected so that each spiral reference pattern is written over at least twenty revolutions of the disk to increase the accuracy of the head position error generated from the reference servo bursts.
REFERENCES:
patent: 4531167 (1985-07-01), Berger
patent: 4636885 (1987-01-01), Yamada et al.
patent: 4812929 (1989-03-01), Stewart et al.
patent: 5553086 (1996-09-01), Sompel et al.
patent: 5583712 (1996-12-01), Brunelle
patent: 5619387 (1997-04-01), Ottesen et al.
patent: 5668679 (1997-09-01), Swearingen et al.
patent: 5793559 (1998-08-01), Shepherd et al.
patent: 6023145 (2000-02-01), Karaaslan et al.
patent: 6061200 (2000-05-01), Shepherd et al.
patent: 6091564 (2000-07-01), Codilian et al.
patent: 6292318 (2001-09-01), Hayashi
patent: 6304407 (2001-10-01), Baker et al.
patent: 6429995 (2002-08-01), Dobbek et al.
patent: 6469859 (2002-10-01), Chainer et al.
patent: 6476989 (2002-11-01), Chainer et al.
patent: 6507450 (2003-01-01), Elliot
patent: 6519107 (2003-02-01), Ehrlich et al.
patent: 6704156 (2004-03-01), Baker et al.
patent: 6738205 (2004-05-01), Moran et al.
Agarwal Vinay K.
Cloke Robert L.
Hudspeth David
Shara, Esq. Milad G.
Sheerin, Esq. Howard H.
Tzeng Fred F.
Western Digital Technologies Inc.
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