help! shugart 801 - test-drb@ccmp.vtda.org

22 Jul 2003

Did you check the drives opto sensor's light path to
make sure that no dust bunnies are blocking the path?

i have an osi/macom that uses the same drives and
after troubleshooting three good drives - i discovered
that the drive interface card and 1 cpu had been
pluged into the molex plug backplane backwords!

one of these days i'll have to re chip and re cap both
boards.

anyhoo, you may want to check out your controller to
insure that it is sending a head load signal.

also on those drives,there are some wire jumpers that
may need to be set and soldered.

if i remember correctly - there is two different
boards used on those drives too - one is for hard
sectored and one is for soft sectored thier may be
another for mfm vs another standard too - double check
the boards on the drive's with your orignal - your
looking for the missing or complete parts on the fm
data sep and other silk screened areas and the wire
jumper location's at the back of the card edge
connector.

just rememebered my drives were siemens fdd 100-8 e
hope this helps anyway.

Bill

Message: 31
Date: Mon, 21 Jul 2003 21:40:07
To: cctalk(a)classiccmp.org
From: Joe &lt;rigdonj(a)cfl.rr.com&gt;
Subject: help! shugart 801
Cc: Dave Mabry &lt;dmabry(a)mich.com&gt;
Reply-To: cctech(a)classiccmp.org

    I have several systems that use Shugart 800-1 SS
8" disk drives. 
I've
got several defective drives plus I've been wanting
some spares. Last 
week
I picked up 10 Shugart model 801 SS drives. Today I
tried to use them 
on
the same systems but I can't make them work. I've set
all the jumpers 
and
straps exactly the same as in the 800-1 drives but the
801s aren't 
working.
The system knows the drive is there and detects the
disk being in place 
and
rotating and that the drive door closed but the drive
never gets the 
head
load signal. I'm using the same system, cables, power
supply, etc with 
both
drives so the only difference is the drives
themselves. I've tried a 
couple
of 801s and gotten exactly the same results with all
of them so I don't
think that it due to a drive failure. Anybody have any
experience with
these or have a good idea of what's wrong?

   Joe

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