Isn't that the standard failure mode of the RD53
(aka the Micropolis
1300-series)? The head actuator sticks, and the drive can't find the
right servo tracks when it spins up...
Or it could be a weak brake solenoid. This is easily fixed as well.
I had a sick RD53 and this was the reason - it'd been working for over a
year after moving the brake solenoid back a bit. The brake was not
retracting far enough to completely clear the motor spindle assembly.
Kevin
--
Kevin McQuiggin VE7ZD
mcquiggi(a)sfu.ca