so as to ensure extraction of positioning information from burst pattern data of the sequential positioning data area. The gap section absorbs of rotation jitter of the magnetic disk.
Generally, as shown in FIG. 8, the positioning data area of the hard disk drive in which the conventional inductive head is provided has a plurality of burst areas (in this example, A, B, C and D areas). In each burst area, a burst signal area where continuous data is recorded with the width Tp of the track pitch and an area erased in a DC manner are alternately provided in a direction of the width of the track. That is, the burst signal area and the erased area are provided as deviating in the width direction of the track.
Awrong linearity obtained from position information generated by the signals of the burst A and the burst B).
In order to form the above-mentioned positioning data area, as shown in FIGS. 9A to 9C, the recording of the positioning data area is performed by feeding the magnetic head by a half of the track pitch Tp, and overwriting information on a base recording before the movement of the head to a portion, and adjusting the phases.
In the case that the positioning data area is recorded by use of the inductive recording MR reproducing composite head (hereinafter, referred to as a composite MR head), there is known that an edge bipolar charge directing in a direction of the width of the track is generated at both sides of the recording