Patent ID: 7092194

Claim:
In a magnetic storage device, a method of calibrating motion of a transducer in a vertical direction, the transducer being bi-directionally movable with respect to the surface of a rotatable magnetic medium, the method comprising: determining an infinite resistance value of a current passed through the transducer at a first vertical position with respect to the magnetic medium surface; determining a contact resistance value of the current passed through the transducer at a second vertical position with respect to the magnetic medium surface, the second position corresponding to physical contact between the magnetic medium surface; iteratively adjusting the position of the transducer to a position between the first and second vertical positions while causing the transducer to pass over a plurality of ridges defined on the magnetic medium surface and measuring a resistance value of the current passed through the transducer for each iteration; and determining the relationship between each vertical position and its corresponding resistance value.