A magnetic disk drive and the control method thereof

摘要

The position information of the magnetic head (101)-is generated also from the data area (303) to improve the positioning accuracy. The magnetic disk drive has a function (501) of oscillating the magnetic head in the radial direction in the data area at a specific frequency and a function (502) of detecting a read signal during the execution of the oscillation function and detects (503) position information of the magnetic head from the detected read signal. The magnetic head position control can be performed in the data area. The magnetic head position signal not dependent on the frequency of a sampling signal generated from the servo information area can be generated. This in turn improves the data recording density and allows a highly precise position control of the magnetic head, thus improving the reliability of the magnetic disk drive.