Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!wuarchive!texbell!merch!cpe!hal6000!trsvax!uhclem
From: uhclem@trsvax.UUCP
Newsgroups: comp.sys.tandy
Subject: Re: Tandy 6000 hard disk replacement
Message-ID: <193300190@trsvax>
Date: 28 Nov 89 15:28:00 GMT
References: <2262@scicom.AlphaCDC.COM>
Lines: 37
Nf-ID: #R:scicom.AlphaCDC.COM:2262:trsvax:193300190:000:1822
Nf-From: trsvax.UUCP!uhclem    Nov 28 09:28:00 1989


<>
B>I am trying to replace the 15 Meg hard disk in my Tandy 12/6000 external
B>disk unit.  A posting of a few weeks ago indicated that this should be
B>straightforward but I have encounterd a problem, namely three discrete
B>wires soldered to the drive electronics board and connected to the controller.
B>The previous posting did not mention anything like them and I am unsure
B>of what to do about them.
B>
B>My new drive (a ST-251) will not work without them (I get "drive not ready"
B>messages when I try to format). Any help or information will be appreciated.

The "three wires" are not the cause of your "not ready" condition.  Check
the drive select straps or terminators IF the format does not even start. 

If the format starts but gets not ready errors after running a while, you
have not covered pin 2 on the "Control" cable.  That is the 34 pin cable.
Put a piece of electricians tape (not Scotch!) over the pin 2 etch on
the drive connector and the not ready errors should go away.  You have a 
drive with a ST412 interface and the II/12/16/3/4/6000 were wired for
drives with a ST506 interface.

The three wires you speak of implement the ACTIVE light on the front panel,
and the ability to write-protect the media.  If you can live without
either of these things, you do not need the wires.  The points those
wires latch onto are not present or do not have the desired signals on
every make of drive.

<This information is provided by an individual and is not nor should be
 construed  as  being  provided  by  Radio  Shack or Tandy Corp.  Radio
 Shack/Tandy Corp has no obligation to support the information provided
 in  any way.   Sorry, nothing funny today....>
						
					"Thank you, Uh Clem."
					Frank Durda IV @ <trsvax!uhclem>
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