Patent ID: 8154819

Claim:
A method of controlling a flying height of a magnetic head, the method comprising: applying a first signal for adjusting a flying height of a magnetic head to each magnetic head according to a scale value set according to each magnetic head, and performing touchdown by changing a value of the first signal; and calculating a flying height of a magnetic head for which touchdown is to be performed based on the value of the first signal that was changed to perform touchdown of the magnetic head, wherein a flying height is sequentially calculated according to each magnetic head by changing a magnetic head for which touchdown is to be performed, by sequentially adjusting the scale value set according to each magnetic head, and wherein the method further comprises determining a scale value with respect to a reference value of the first signal according to each magnetic head, to maintain a target flying height based on the calculated flying height, and copying a servo pattern by applying the scale value with respect to the reference value of the first signal.