Patent ID: 7548396
Filing Date: 2009-06-16
Classification: G11B

Abstract:
1. A storage apparatus comprising a seek control unit which moves a head to a vicinity of a target track of a storage medium by coarse control of a rotary actuator and then switches the control to fine control so as to position the head to the target track; a rotation disturbance compensation control unit which adds a rotation disturbance vibration detection signal detected based on an acceleration velocity sensor to the seek control unit as a compensation signal so as to cancel out a rotation disturbance vibration component; and a compensation control switching unit which sets the rotation disturbance compensation control unit to be either enabled or disabled, switches the enabling or disabling setting state of the rotation disturbance compensation control unit to the opposite setting state when a coarse seek error, in which the head position is out of a predetermined fine switch error range with respect to the target track, is determined at the end of the coarse control by the seek control unit, and causes the seek control unit to perform seek again.