{HEAD ~ A disk drive} is disclosed comprising {TAIL ~ a head} actuated over a disk, and control circuitry including a shock detector 
is disclosed comprising
{ HEAD ~ A disk drive } is disclosed comprising { TAIL ~ a head } actuated over a disk , and control circuitry including a shock detector
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH