Patent ID: 6765742
Filing Date: 2004-07-20
Classification: G11B

Abstract:
A disk storage apparatus comprising:a head for recording data and reproducing data from a disk, a head stop member for maintaining the head in a stopped state; an actuator mechanism for holding the head; a voice coil motor for providing a driving force to the actuator to move the head from a position on the head stop member to an inner-periphery side of the disk; a motor drive control circuit including: a first power supply circuit for supplying a control current having a maximum rated value to the voice coil motor to control a driving operation of the voice coil motor, and a second power supply circuit for supplying to the voice coil motor an additional control current in addition to the control current; and a controller for detecting a head stop condition when the first power supply circuit supplies the control current to the voice coil motor at the maximum rated value, the controller controlling the second power supply circuit to add the additional control current from the second power supply circuit to the voice coil motor when the controller detects the head stop condition, wherein the head stop condition is that the head does not move from the head stop member when the first power supply circuit supplies to the voice coil motor the maximum rated value of the control current.