The present invention is directed to a method and apparatus for performing
best head detection in a disk drive using reference tracks. In one
embodiment, a disk drive includes a plurality of disk surfaces. Each disk
surface has a read head and a write head associated therewith. A servo
track writer is provided for moving each write head and each read head
relative to their corresponding disk surfaces. Reference tracks are
written onto each of the disk surfaces. The reference track from each
disk surface is read by its corresponding read head to determine a best
read head. In one embodiment, the servo track writer sweeps each read
head across its corresponding reference track as the reference track is
being read. In one embodiment, each reference track includes reference
track patterns and the best read head is the read head that detects the
most patterns.