Detecting head landings on a data zone of a data storage disc

Details Detecting head landings on a data zone of a data storage disc Detecting head landings on a data zone of a data storage disc

2005-04-05

2005-04-05

Sniezek, Andrew L. (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

Reexamination Certificate

active

06876510

ABSTRACT:
Method and apparatus for detecting head landings on a data zone of a data storage disc. A disc drive includes an actuator which controllably positions a head adjacent a disc and nominally retracts the head to a parked position when the drive is deactivated. The actuator moves in response to current applied to an actuator coil immersed in a magnetic field. During disc drive initialization, the disc is accelerated to a velocity sufficient to allow the head to be aerodynamically supported over the disc, and current is passed through the actuator coil to urge the head toward the parked position. The current is monitored to detect generation of a back electromotive force (bemf) voltage induced by movement of the coil. An error condition is logged indicating that an initial position of the head was over a data zone of the disc when bemf voltage is detected.

REFERENCES:
patent: 5495156 (1996-02-01), Wilson et al.
patent: 5781363 (1998-07-01), Rowan et al.
patent: 5844743 (1998-12-01), Funches
patent: 5936788 (1999-08-01), Boutaghou et al.
patent: 5963393 (1999-10-01), Rowan et al.
patent: 6025968 (2000-02-01), Albrecht
patent: 6081400 (2000-06-01), Lu et al.
patent: 6204629 (2001-03-01), Role et al.
patent: 6222696 (2001-04-01), Kim
patent: 6252744 (2001-06-01), Kelemen
patent: 6363214 (2002-03-01), Merello et al.
patent: 6396652 (2002-05-01), Kawachi et al.
patent: 20020054451 (2002-05-01), Moon et al.
patent: 20030112537 (2003-06-01), Forrer, Jr.

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