Dynamic magnetic information storage or retrieval – General processing of a digital signal – Data clocking
Reexamination Certificate
2006-08-01
2006-08-01
Young, Wayne (Department: 2651)
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Data clocking
C360S048000, C360S075000, C360S053000, C360S077020, C360S077040
Reexamination Certificate
active
07085084
ABSTRACT:
A magnetic disk apparatus and a servo pattern recording method therefor, enabling writing of servo signal with high quality, without being affected with ill influences due to fluctuation on a rotation speed when conducting the self servo write operation, comprises: a magnetic disk102; a head103having a write element for use of recording information onto the magnetic disk and a read element for reproducing information from the magnetic disk; and an actuator for moving said head to a desired radial position on the magnetic disk, wherein on the magnetic disk is recorded servo patterns110for positioning the head on a recording surface thereof, and within each of the servo patterns are recorded, a pattern sector marker208aas a marker for detecting passage time of the head, a track ID code209, and a burst pattern210for use of detection of the radial position of the head, following a preamble207afor use of synchronization of time-base circuit, and further recorded and disposed a second preamble207band a second sector marker208b,continuously.
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Horisaki Makoto
Satoh Naoki
Yasuna Kei
Antonelli, Terry Stout and Kraus, LLP.
Hitachi Global Storage Technologies Japan Ltd.
Mercedes Dismery
Young Wayne
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