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From: geller@eli.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: PC's Limited plug
Message-ID: <158@eli.UUCP>
Date: Wed, 25-Feb-87 03:13:18 EST
Article-I.D.: eli.158
Posted: Wed Feb 25 03:13:18 1987
Date-Received: Fri, 27-Feb-87 06:54:51 EST
References: <215@batcomputer.tn.cornell.edu>
Organization: Electric Logic, Inc., Washington, D.C.
Lines: 29
Keywords: mail order
Summary: MICROSCIENCE HD SQUEEL SOLUTION

In article <215@batcomputer.tn.cornell.edu>, prove@batcomputer.tn.cornell.edu (Roger Ove) writes:
> 
> ...and a 10M Microscience...
>    The drive on the other hand, was crap.  After a few days of
> work, it developed an intermittent high pitched squeel (like
> chalk on a blackboard).  I sent the drive back and they replaced
> it, and the new drive had the same problem.  Tried once more:
> same result (1 of the drives actually survived for 9 months).
> I checked (not trusting mail order places) and the replacement
> drives were different units.

I am amazed you didn't even try to pleasantly call Microscience and
find the solution. I did. It was VERY easy. They were VERY pleasant
and told me that the static discharge conductor - a little itty bitty
piece of copper that makes contact with the axel, if you will, of
the drive can get dirty and cause this noise to occur. This little
piece of metal can be seen on the underside of the drive. Microscience
had run tests prior to these happenings and concluded that the static
discharge conductor was not required. The technician said "just bend it
till it breaks off." I did. The drive stopped making noise! I should
say that I was concerned before I found this out. I even
suspected that the problem was a noisy power supply and replaced that
device (how foolish). Anyhow, I have had a Microscience 20 Mbyte
disk drive running for 2 1/2 years. After the 2nd year the noise started
and it was soon fixed. I highly recommend their products.

David Geller
Electric Logic, Inc.
Washington, D.C.