A method and an apparatus for reducing position error signal in a disk
drive, which has an actuator and a magnetic medium, write the servo tracks
with a servo track writer using a varying increment. The servo tracks are
written after the servo track writer incrementally moves the actuator by a
non-constant amount. The non-constant incrementing enables a servo track
writing operation to write servo tracks that are at least as wide near the
outer circumference as they are near the zero skew position or near the
inner circumference.
