Patent ID: 6781787
Filing Date: 2004-08-24
Classification: G11B

Abstract:
A hard disk drive comprising:a rotatable disk having a magnetic recording media wherein the rotatable disk defines a plurality of concentric servo tracks; a pivotable actuator that is movable with respect to the rotatable disk; a transducer disposed on the actuator so as to be movable with respect to the disk so as to be positionable on a selected servo track of the plurality of concentric servo tracks; a voice coil motor that moves the pivotable actuator in response to an applied current so as to permit movement of the transducer from a first location to a second location wherein movement comprises an acceleration phase and a deceleration phase; and a controller for controlling the applied current according to a current profile, wherein the current profile has a first portion corresponding to the acceleration phase, and a second portion corresponding to the deceleration phase, and wherein the controller monitors a parameter indicative of the movement of the actuator during the application of the first portion of the current profile to determine a performance related parameter and wherein the controller then utilizes the performance related parameter to adjust the configuration of the second portion of the current profile to thereby reduce the time needed to position the transducer adjacent the second servo track.