Disk drive with staggered calibration bursts that are disposably located in data regions and method of using the same for calibrating a read head

A method of calibrating a read head in a disk drive comprising the steps of:

• track following on a first plurality of servo burst pairs located in servo sectors;
• while coasting past a second plurality of calibration burst pairs that are located in data sectors, the second plurality of calibration burst pairs being offset by a plurality of known radial displacements from the first plurality of servo burst pairs;
• reading servo signals from the second plurality of calibration burst pairs;
• and
• associating the servo signals with the plurality of known radial displacements.

A method of calibrating a read head in a disk drive comprising the steps of:

• (a) recording a first plurality of servo burst pairs defining a plurality of burst pair centerlines in a plurality of servo sectors, the burst pair centerlines defining a track centerline;
• (b) recording a second plurality of servo burst pairs in a plurality of data regions and at a plurality of known radial displacements from the track centerline, the second plurality of servo burst pairs being distributed over a plurality of different radial displacements;
• (c) track following on each burst pair centerline;
• (d) while coasting past successive ones of the second plurality of servo burst pairs:
• (e) reading servo signals from the successive ones of the second plurality of servo burst pairs;
• and
• (f) associating the servo signals with the known radial displacements.

A disk drive having a recording disk with servo bursts recorded thereon according to a method of recording servo bursts which permits the disk drive to independently calibrate a read head that develops nonlinear servo signals as a function of displacement when offset from a burst pair centerline, the method comprising the steps of:

• recording a plurality of servo burst pairs in a plurality of servo sectors to define concentric burst pair centerlines;
• recording a plurality of calibration burst pairs in a plurality of data regions and at a plurality of known radial displacements from each burst pair centerline;
• and
• varying the plurality of known radial displacements relative to each burst pair centerline while recording the plurality of calibration burst pairs.