A system and method for processing track identification data in a disk drive
having
concentric tracks each having a track identification field (TIF) stored in embedded
servo sectors, the TIF includes a band segment identifying a group of tracks, and
an index segment identifying a single track of the group of tracks. The system
and method include reading a servo sector to obtain the TIF, parsing the TIF to
obtain the band segment, comparing the obtained band segment to an expected band
segment to obtain a band segment differential (BSD), initiating an action if the
BSD exceeds a pre-determined threshold and varies from the expected band segment
by a predetermined number of bits, initiating another action if the BSD exceeds
the predetermined threshold and does not vary from the expected band segment by
the predetermined number of bits. The process is then applied to the index segments
of the band segment.