Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1997-03-31
2000-07-04
Loomis, Paul
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 48, 360 51, G11B 5596, G11B 509
Patent
active
060847395
ABSTRACT:
A write synchronization system in a headerless format magnetic disk device. The system transmits encoded synchronization signals containing disk administration information such as servo burst information between a servo controller and other disk controller components such as a hard disk controller and a microprocessor or digital signal processor. The servo controller interprets the disk administration information read from the magnetic disk and sends an encoded signal to the other disk controller components for each servo burst encountered on when reading the disk. The disk administration information in the signals can be verified by comparing the contents of a present signal to the contents of at least one previous signal to determine if a servo burst from a sequence of servo bursts has been missed. A missing servo burst can also be identified by measuring the time interval between signals from the servo controller.
REFERENCES:
patent: 5523903 (1996-06-01), Hetzler et al.
patent: 5801896 (1998-09-01), Freitas
patent: 5802584 (1998-09-01), Kool et al.
Abstract of JP 61221842, Ueda, Toshiharu, Oct. 1986.
Adaptec, Inc.
Loomis Paul
Neal Regina Y.
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