Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2005-07-12
2005-07-12
Faber, Alan T. (Department: 2651)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
C360S075000, C360S135000
Reexamination Certificate
active
06917487
ABSTRACT:
A disk storage system having servo data stored thereon for accurate head position control over a magnetic or other storage medium. The servo data is seamless and untrimmed and consists of a primary servo burst set (AB burst) that defines the desired tract pitch for the surface. Multiple secondary servo burst sets (e.g., CD burst and EF burst) are written at the desired track pitch but radially offset from the primary burst set. The servo data is written in multiple servo sectors around the surface of the medium. From the servo data, PES (position error signals) are generated for providing linear position sensitivity information to the head position control logic. The resulting PES is more linear for smaller head sizes.
REFERENCES:
patent: 4157577 (1979-06-01), Porter, Jr. et al.
patent: 4454549 (1984-06-01), Pennington
patent: 5381281 (1995-01-01), Shrinkle et al.
patent: 5612833 (1997-03-01), Yarmchuk et al.
patent: 5757574 (1998-05-01), Chainer et al.
patent: 5760986 (1998-06-01), Morehouse et al.
patent: 5771131 (1998-06-01), Pirzadeh
patent: 5796543 (1998-08-01), Ton-That
patent: 5892634 (1999-04-01), Ito et al.
patent: 5946157 (1999-08-01), Codilian et al.
patent: 5966264 (1999-10-01), Belser et al.
patent: 6049442 (2000-04-01), Fukushima et al.
patent: 2286481 (1995-08-01), None
patent: 361080573 (1986-04-01), None
patent: 409282818 (1997-10-01), None
patent: 9293342 (1997-11-01), None
patent: 411007738 (1999-01-01), None
“Seamless Servowriting for High-Track Desnity Magneto-Resistive Sector Servo System”; IBM Technical Disclosure Bulletin; vol. 38; No. 06, Jun. 1995.
Servo Pattern for Hard Disk Drives With High Track Density; IBM Technical Disclosure Bulletin; vol. 38; No. 01; Jan. 1995.
“Quad Burst Servo Pattern”; IBM Technical Disclosure Bulletin; vol. 22; No. 12; May 1980.
Faber Alan T.
Hitachi Global Storage Technologies, Inc.
Wagner , Murabito & Hao LLP
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