Patent attributes
Embodiments in accordance with the present invention improve the head characteristic and avoid collisions between a head element section and a recording disk. A hard disk drive according to an embodiment of the present invention performs TFC (Thermal Fly height Control) to adjust the clearance between the head element section and recording disk by means of thermal expansion. A head slider includes a TFC heater. The hard disk drive detects its acceleration and controls the TFC heater in accordance with the detected acceleration, thereby reducing the probability of collision between the head element section and recording disk. Further, the hard disk drive detects residual vibration prevailing after impact application. The heater turns back ON when the residual vibration becomes lower than a reference level.
