Dynamic magnetic information storage or retrieval – General processing of a digital signal – Data clocking
Reexamination Certificate
2004-06-23
2008-10-21
Feild, Joseph (Department: 2627)
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Data clocking
C360S048000, C360S077070
Reexamination Certificate
active
07440210
ABSTRACT:
A method of writing spiral tracks on a disk of a disk drive is disclosed. The disk drive comprises control circuitry and a head disk assembly (HDA) comprising the disk, an actuator arm, a head coupled to a distal end of the actuator arm, and a voice coil motor for rotating the actuator arm about a pivot to position the head radially over the disk. A write clock is synchronized to the rotation of the disk, and a plurality of spiral tracks are written on the disk at a predetermined circular location determined from the write clock. Each spiral track comprises a high frequency signal interrupted at a predetermined interval by a multi-bit sync mark, and each multi-bit sync mark comprises a plurality of bits.
REFERENCES:
patent: 5430661 (1995-07-01), Fisher et al.
patent: 5576906 (1996-11-01), Fisher et al.
patent: 5583712 (1996-12-01), Brunelle
patent: 5668679 (1997-09-01), Swearingen et al.
patent: 5696639 (1997-12-01), Spurbeck et al.
patent: 5754352 (1998-05-01), Behrens et al.
patent: 5754353 (1998-05-01), Behrens et al.
patent: 5761212 (1998-06-01), Foland, Jr. et al.
patent: 5793548 (1998-08-01), Zook
patent: 5831888 (1998-11-01), Glover
patent: 5838512 (1998-11-01), Okazaki
patent: 5917670 (1999-06-01), Scaramuzzo et al.
patent: 6021012 (2000-02-01), Bang
patent: 6023386 (2000-02-01), Reed et al.
patent: 6069499 (2000-05-01), Cho et al.
patent: 6091564 (2000-07-01), Codilian et al.
patent: 6101229 (2000-08-01), Glover
patent: 6181506 (2001-01-01), Shimura et al.
patent: 6191906 (2001-02-01), Buch
patent: 6249395 (2001-06-01), Conway
patent: 6249896 (2001-06-01), Ho et al.
patent: 6272194 (2001-08-01), Sakamoto
patent: 6292318 (2001-09-01), Hayashi
patent: 6304407 (2001-10-01), Baker et al.
patent: 6366225 (2002-04-01), Ozdemir
patent: 6411452 (2002-06-01), Cloke
patent: 6411453 (2002-06-01), Chainer et al.
patent: 6429989 (2002-08-01), Schultz et al.
patent: 6487032 (2002-11-01), Cloke et al.
patent: 6507450 (2003-01-01), Elliott
patent: 6519107 (2003-02-01), Ehrlich et al.
patent: 6587293 (2003-07-01), Ding et al.
patent: 6603622 (2003-08-01), Christiansen et al.
patent: 6704156 (2004-03-01), Baker et al.
patent: 6738205 (2004-05-01), Moran et al.
patent: 6765748 (2004-07-01), Shu
patent: 6771443 (2004-08-01), Szita et al.
patent: 6791777 (2004-09-01), Watanabe et al.
patent: 6882486 (2005-04-01), Kupferman
patent: 6943978 (2005-09-01), Lee
patent: 6965489 (2005-11-01), Lee et al.
patent: 6967799 (2005-11-01), Lee
patent: 6985316 (2006-01-01), Liikanen et al.
patent: 6987636 (2006-01-01), Chue et al.
patent: 6989954 (2006-01-01), Lee et al.
patent: 7002761 (2006-02-01), Sutardja et al.
patent: 7016134 (2006-03-01), Agarwal et al.
patent: 7023631 (2006-04-01), Zhang et al.
patent: 7027247 (2006-04-01), Heydari et al.
patent: 7054083 (2006-05-01), Ehrlich
patent: 7068461 (2006-06-01), Chue et al.
patent: 7088533 (2006-08-01), Shepherd et al.
patent: 7212364 (2007-05-01), Lee
patent: 2001/0010604 (2001-08-01), Esumi
patent: 2003/0030929 (2003-02-01), Ozdemir
Feild Joseph
Negrón Daniell L
Sheerin, Esq. Howard H.
Western Digital Technologies Inc.
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