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From: grr@cbmvax.cbm.UUCP (George Robbins)
Newsgroups: net.micro,net.micro.pc,net.micro.att
Subject: Re: Hard Disk Noise
Message-ID: <209@cbmvax.cbmvax.cbm.UUCP>
Date: Thu, 8-May-86 00:43:26 EDT
Article-I.D.: cbmvax.209
Posted: Thu May  8 00:43:26 1986
Date-Received: Fri, 9-May-86 10:53:42 EDT
References: <1318@ihlpa.UUCP> <2413@islenet.UUCP>
Reply-To: grr@cbmvax.UUCP (George Robbins)
Distribution: net
Organization: Commodore Technology, West Chester, PA
Lines: 28
Xref: watmath net.micro:14556 net.micro.pc:8107 net.micro.att:1169

In article <2413@islenet.UUCP> jons@islenet.UUCP (Jonathan Spangler) writes:
>Clancy asked about hard disk noise on an external 10 Mb CMI hard
>disk. We too have had problems with 20 Mb MicroScience drives
>and an occasional Seagate.
>
>The drives in all cases seemed to be running perfectly except for making
>rather irritating whinning noises. I oiled the MicroScience as it is not
>enclosed on the bottom. Well, that worked for about a week and then back
>to the same old whine. We finally replaced it with a Seagate.
>
>Jonathan Spangler {ihnp4,vortex,dual}!islenet!jons

For further information, many hard drives have a grounding contact on some
kind of spring arrangement, which rubs against the bottom of the motor shaft.
Often these things wear such that they make irritating squeaking, squealing
or screeching noises, either constantly or intermittantly.

Sometime you can solve the problem by bending the spring tab slightly to
increase or decrease the pressure, by putting a tiny amount of grease on
the contact button (see you desk drawer slide) or by sticking a little
electrical tape along the spring to dampen resonances.

BE CAREFUL!  You could cure the noise, but screw up a drive that will cost
you several hundred dollars to replace.  Know your limits...
-- 
George Robbins - now working with,	uucp: {ihnp4|seismo|caip}!cbmvax!grr
but no way officially representing	arpa: cbmvax!grr@seismo.css.GOV
Commodore, Engineering Department	fone: 215-431-9255 (only by moonlite)