"andy" wrote in message
...

Could you please advice what to do to make the disk detectable by the
system
all the time?
What causes that it is not detectable although the failure is in mechanics
not
electronics?


For recovery only;
I've had luck in the past by freezing dead hard drives, leave it over night
in the freezer, have everything ready on your pc, i.e. ide and power cables
loose so that you can plug it straight in and side panel off.

Plug the drive in as soon as it comes out the freezer and boot your pc,
don't bother fixing it into the case. You won't have long to recover your
data (if it works at all) so before trying the procedure, make a mental note
of what is most important to you on the drive and try and grab that first.
Don't expect to be able to recover a large amount of data using this method,
as the drive warms (quickly) you'll soon be back to the original problem.

Good luck, I bet you'll start backups now

HTH

--
Apollo