Method for applying optimal seeking technique to disk file with

Details Method for applying optimal seeking technique to disk file with Method for applying optimal seeking technique to disk file with

1996-05-31

1999-03-23

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7704, G11B 5596

Patent

active

058868461

ABSTRACT:
A method for applying an optimal seeking technique to a disk file with excessive repeatable runout includes a method of modifying a control signal for a rotary actuator arm of a disk drive. The control signal is modified during track seeking by adding a runout state that is calculated each time a servo sector of a target data track on a surface of a disk is sampled by read/write heads carried by the actuator arm. A calibration algorithm can be used during track following to determine runout magnitude and runout phase at various preselected calibration tracks on the surface of the disk. A seeking algorithm can be implemented to compensate for the relative runout magnitude and phase variations between present and target tracks.

REFERENCES:
patent: 5402280 (1995-03-01), Supino
patent: 5404253 (1995-04-01), Painter
patent: 5444583 (1995-08-01), Ehrilch et al.
patent: 5550685 (1996-08-01), Drouin
patent: 5585976 (1996-12-01), Pham
patent: 5617388 (1997-04-01), Ishioka et al.

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