Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uflorida!haven!mimsy!bane
From: bane@mimsy.UUCP (John R. Bane)
Newsgroups: comp.sys.atari.st
Subject: Re: Hard Disk flakiness
Summary: Shielding can help, too
Message-ID: <15803@mimsy.UUCP>
Date: 4 Feb 89 18:11:17 GMT
References: <40fa8983.14e01@elwood.engin.umich.edu> <480016@hpdml93.HP.COM>
Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742
Lines: 23

In article <480016@hpdml93.HP.COM>, rona@hpdml93.HP.COM (Ron Abramson) writes:
> Brain J Denheyer writes:
> >My hard disk has been a1ting very strange and I want to know waht's
> >going on since it is indispensable hardware.
> 
> I had similar problems with my hard drive.  I fixed it by moving the 
> host adaptor (small board which converts the Atari DMA port to SCSI)
> away from the mech and power supply.  Apparently, the host adaptor was
> picking up considerable noise.
> ... 
> Ron Abramson

I had similar troubles with a BMS-Adaptek setup from Berkeley Microsystems.
At the time I lived about an hour's drive from them, so they told me to bring
the rig up there.  After a little experimentation they discovered that it
worked with the boards laying flat on the table, but not stacked and attached
to the disk drive.  I finally fixed it by putting a layer of copper-clad
PC board in the stack between the drive and the host adaptor.  At the time
(about two years ago) they had only heard of one other case like mine, and
never actually SEEN one until mine.
-- 
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