7 Dec
2006
7 Dec
'06
9 p.m.
Seth J. Morabito wrote:
On Thu, Dec 07, 2006 at 07:20:05PM +0000, Adrian
Graham wrote:
gah... I should have read beyond 'check for stiction'... the sticktion
you describe
is what I laid out in option 2... oops... its late... shouldn't be
reading e-mail...
so I didn't read beyond the the first line before commenting... doh !
The one drive I fixed it wasn't sticking to it (physically)... but the
drive was
holding the heads against it hard electrically (felt stuck with drive
on). I
think it holds hard against this looking for track 0... then fine ajusts
for track 0
center.... if that bumper changes geometry with age, or gets moved over
time...
then it can't get a read on track 0.... hence why adjusting it by a
thousandth if
an inch in my case got the drive working nicely....
-- Curt
-- Curt
On 6/12/06 22:27, "Gordon JC Pearce"
<gordon at gjcp.net> wrote:
Head actuator I think; it powers up and spins up, doesn't sound
headcrashed
but I can't hear or feel the heads move.....
Definitely check for stiction, it's a very common problem on RD53s. If
the data on them is worth saving, you can probably make a clean enough
environment in your home or office to open up the drive assembly and
nudge the head loose from the sticky rubber that it's parked against.
You can probably get at least one good read out of it without it
crashing (I know folks who've opened up their RD53s, reassembled them,
and run them successfully for months afterward. YMMV!)
Indeed,
it looks like the original boot drive (also an RD53) long gave up
the ghost, which is a shame because it had RT11 5.4 and one of the systems I
wrote in the 1980's......
What actually fails in them?
-Seth