Path: utzoo!utgpu!watserv1!watmath!att!rutgers!cs.utexas.edu!sun-barr!newstop!sun!amdahl!dgcad!gary
From: gary@dgcad.sv.dg.com (Gary Bridgewater)
Newsgroups: comp.periphs.scsi
Subject: Re: Need help with Sun SCSI DB50 <--> Centronics
Message-ID: <652259297.23871@proa.sv.dg.com>
Date: 2 Sep 90 07:08:17 GMT
References: <290@gort.cs.utexas.edu>
Organization: Data General SDD, Sunnyvale, CA
Lines: 25

In article <290@gort.cs.utexas.edu> jason@cs.utexas.edu (Jason Martin Levitt) writes:
>
>    I want to daisy chain some peripherals from a Sun 3/60.
>I have a DB50 <--> Centronics SCSI cable that is supposed to
>work with the 3/60.
>   4. One symptom I am getting is that a peripheral will not power
>      up when the SCSI cable from the Sun [or mac] is attached but 
>      powers up immediately if I remove the cable. The motor start
>      option is disabled.


This is the symptom of a cable mis-match. 
It was at this point that I sat down and read the Sun 3/60 pinouts and the
WREN pinouts and the pinouts of the peripheral box I was using and 
discovered that the Sun 3/60 was, well, different.  Something like
SCSI A versuss SCSI-B.   Why do we need more that one SCSI you ask -
and I reply RS232.  "Standard" means something else than what us poor
users think, I guess.
Never could get exteral termination to work.  Tried hard.
Never could get oldish 3/60 boxes to work with newish peripherals on the
same wire but didn't try too hard.  With a WREN VI the 70MB shoebox just
wasn't that interesting anymore.
-- 
Gary Bridgewater, Data General Corporation, Sunnyvale California
gary@sv.dg.com or {amdahl,aeras,amdcad}!dgcad!gary
C++ - it's the right thing to do.