The present invention compensates for variations in the angular velocity
of the drive's spindle motor by periodically dropping clocks to a counter
based upon the previous servo wedge-to-wedge timing. This enables a
substantially constant count to be maintained between servo wedges and
allows a more predictable generation of the data sector pulses. A more
predictable generation of the data sector pulses enables the size of the
guard band preceding each data sector to be decreased and the capacity of
the disk to be correspondingly increased.