Estimation of bias force for data tracking in a disk drive

Details Estimation of bias force for data tracking in a disk drive Estimation of bias force for data tracking in a disk drive

2005-01-10

2010-02-23

Blouin, Mark (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S078040

Reexamination Certificate

active

07667922

ABSTRACT:
Bias force changes in a disk drive, including transient bias changes, are predicted and/or estimated. Bias compensation or change in bias compensation is calculated based on drive operating parameters such as seek length. Calculation can correspond to a modeled relationship of bias forces to seek length. Preferably, bias compensation calculation is adaptive and calculation parameters can be updated during normal read/write use of the disk drive.

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