A method is disclosed for selecting a dynamic fly height (DFH) control
setting for a head in a disk drive, the disk drive comprising a plurality
of disk surfaces and plurality of respective heads. The method comprises
servoing a first head over a first disk surface in response to servo data
recorded on the first disk surface, adjusting a DFH control setting for a
second head, and while servoing the first head over the first disk
surface, detecting whether the second head has contacted a second disk
surface.