Patent ID: 6798606
Filing Date: 2004-09-28
Classification: G11B

Abstract:
A method for linearizing a position error signal (PES) in a data storage device, comprising:(a) performing a PES gain calibration for stitching the PES gains at quarter-track positions for even and odd track types on the data storage device; (b) performing a first servo loop gain calibration at a first target frequency with a first target gain at a track-center position on the data storage device and with a first noise excitation; and (c) performing a PES linearization calibration to obtain a non-linear property of an off-track position vs. a measured PES for even and odd track types on the data storage device, wherein the PES linearization calibration includes a servo loop gain calibration at a second target frequency with a second target gain at the track-center position and at locations spaced from the track-center position on the data storage device and with a second noise excitation.