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From: ELLIOT@primerd.UUCP
Newsgroups: comp.os.cpm
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Message-ID: <8708061516.AA11305@primerd.prime.com>
Date: Thu, 6-Aug-87 09:21:11 EDT
Article-I.D.: primerd.8708061516.AA11305
Posted: Thu Aug  6 09:21:11 1987
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To:       (info-cpm@simtel20.arpa)
From:     Elliot Mednick
Date:     06 Aug 87  8:46 AM
Subject:  Xerox 820 DD problems - The Solution!!!

I received mail from Ken Wallenewein who hit the nail on the head when he
wrote:

>I've had problems with one of my 8" CDC drives with random garbaged sectors.
>As near as I can tell, the heads weren't being loaded quickly enough. It only
>seemed to be a problem during modem downloads - the writes were far enough
>apart that the head load solenoids were had to be loaded first. I don't think
>I ever found a good solution...
>/kenw

As  soon as I read this, I knew how to correct the problem.  On my Shugarts,
there is a screw to adjust the distance between the disk and the load pad when
the disk was not loaded.  I turned out that all I needed to do was reduce the
distance, thus reducing the loading time.  Ken, you may want to check this on
your CDCs.  Note that there are two screws; one is sealed, so adjust the bottom
one.

Thanks to those who have replied.  I now have a 100% functional CP/M system
with dual 8" DD drives.  Now if only I can get PD software from the archive
server... :-)

-Elliot