| 摘要 |
An actuator supports a head such that the head is movable in a radial direction of a disk. The actuator has a voice coil motor (VCM) used as a driving source for the actuator. A voice coil motor driver (VCM driver) supplies the VCM with a driving current for driving the VCM. During a head unload operation of using the actuator to retract the head to a ramp away from a recording surface of the disk, a driver driving unit drives the VCM driver by a voltage higher than that required for a non-head-unload operation.
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