Patent ID: 7952828

Claim:
A hard disk drive comprising: a voice coil motor driving portion which supplies drive current to a voice coil motor; a controller which compares a supply voltage supplied to predetermined chips installed on a printed circuit board with a parking reference voltage previously set to a voltage higher than a power-on-reset voltage and controls the voice coil motor driving portion to apply current to a voice coil of the voice coil motor through the voice coil motor driving portion to park a magnetic head in a predetermined parking zone, when the supply voltage is lower than the parking reference voltage; and a capacitor which is electrically connected to the voice coil of the voice coil motor and parks the magnetic head without using counter electromotive force of a spindle motor by applying predetermined current to the voice coil of the voice coil motor through the voice coil motor driving portion when the supply voltage supplied to the chips on the printed circuit board is cut off.