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From: andys@men2a.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: PC's Limited plug
Message-ID: <884@men2a.UUCP>
Date: Sun, 22-Feb-87 11:06:39 EST
Article-I.D.: men2a.884
Posted: Sun Feb 22 11:06:39 1987
Date-Received: Wed, 25-Feb-87 06:41:37 EST
References: <215@batcomputer.tn.cornell.edu>
Reply-To: andys@men2a.UUCP (Andrew Sibre)
Organization: Calculon Corp., Arlington Va.
Lines: 22
Keywords: mail order Microscience
Summary: Microscience Good, Tandon Bad

I currently own a Microscience 10 MB Hard Disk, and a Toshiba 86 MB one.
My microscience developed the same squeal in the same amount of time.

The reason;
	There is a small protrusion from the center of the spindle motor,
which spins with the platters.  There is also a grounding strap, attached
to the PCB, which presses against that spinning protrusion.  As the mating
sufaces glaze over, they begin to squeal.  It is definitely annoying.

The fix:
	Get a long thin knife, and bend the copper grounding strap AWAY from
the protrusion so as to reduce the pressure with which it presses on that 
protrusion.   It should rest LIGHTLY on it.  Presto! No more noise, and
you wind up with a VERY reliable, low-power, drive.  (I've done this to at 
least 4 of them in customer-owned Kaypro 10's and PC's, all at least 2 years
ago, and no complaints of any kind since.)  I wish the unreliability of the 
Tandons had not been as much of a problem as it was!

	I hope the gentleman who chose the Tandon in lieu of a quiet
Microscience does frequent backups!

--andys@men2a.UUCP