A disk drive that compensates for written-in track squeeze errors (TSEs)
during track following is disclosed. The disk drive may be used to
compensate for TSEs when determining the position error signal (PES) by
implementing operations that include: determining a track squeeze value
for a servo sector based upon read servo bursts; determining a PES value
for the servo sector based upon read servo bursts; estimating a Squeeze
Correction Coefficient (SCC) to account for track squeeze induced PES
sensing gain variation associated with the servo sector based upon the
PES value and the track squeeze value; calculating a squeeze corrected
PES value based upon the SCC and the PES value; and utilizing the squeeze
corrected PES value in servo control.