12 Sep
2010
12 Sep
'10
4:17 p.m.
I have just acquired a MicroVAX 2000 which I found to contain an RD54. If I
try booting the machine from the disk you hear a whine, when the whine stops
you can hear the heads move, then when the heads stop moving you hear the
whine again. Is this a terminally sick disk?
Thanks
Rob
12 Sep
12 Sep
9:21 p.m.
Rob Jarratt wrote:
I have just acquired a MicroVAX 2000 which I found to
contain an RD54. If I
try booting the machine from the disk you hear a whine, when the whine stops
you can hear the heads move, then when the heads stop moving you hear the
whine again. Is this a terminally sick disk?
Thanks
Rob
Years ago, I ran an XT-2190 and an XT-1140 in a PC.
The 2190 did not have a whine... but the 1140 did... but I discovered
that it
only happened in a certain track range.... so I wrote a program that call a
DOS interrupt to seek the heads to a quiet track... compiled it and
called it
q1140.com. If the whine bothered me (and it happened to be whining), I
could
type q1140 at the DOS prompt and have the noise go away.
The drive worked flawlessly until it was retired.....
Never did know what the whine was.
-- Curt
19 Sep
19 Sep
10:46 a.m.
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-
bounces at classiccmp.org] On Behalf Of Rob Jarratt
Sent: 12 September 2010 21:17
To: General Discussion: On-Topic and Off-Topic Posts
Subject: RD54 Whine
I have just acquired a MicroVAX 2000 which I found to contain an RD54. If
I try
booting the machine from the disk you hear a whine,
when the whine stops
you can hear the heads move, then when the heads stop moving you hear
the whine again. Is this a terminally sick disk?
Thanks
Rob
I had a couple of private replies on this. Someone suggested turning the
machine on its side, a change in sound might indicate a bearing problem and
that otherwise it might be the servo mechanism. The noise and behaviour did
not change. I don't think it is the bearing, because the heads do not move
when it whines. I suspect it is trying to move the head and can't for some
reason.
I have opened up RD53s to fix the sticky bumper problem and am comfortable
with that. But I recall others saying RD54s are another matter altogether.
Do I have a chance of getting this disk working?
Regards
Rob
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