Switches on RT E70 drive

Article View: comp.sys.ibm.pc.rt

Article #1074

Back to comp.sys.ibm.pc.rt Previous Next

#1074

From: Jon Zeeff
Date: Tue, 15 Jan 1991 23:19

51 lines
1536 bytes

I'm in the process of adding a second and third E70 drive to a IBM-RT running
4.3 bsd.  I made a straight through 34 pin cable that goes to all the
drives.   The problem seems to be in how to set the switches on the drive
(drive select) to work properly.

IBM recommends (for their twisted cable):
  Internal
  Installation
  ----------
  |Off  On |
1 | X      |
2 |      X |
3 |      X |
4 | X      |
5 |      X |
6 | X      |
  ----------

I find that this works for the first drive (with my no twist cable):

  Internal
  Installation
  ----------
  |Off  On |
1 | X      |
2 |      X |
3 |      X |
4 |      X |
5 | X      |
6 | X      |
  ----------

I have no idea how to set the switches for the second and third drive.  My
guess of 
  ----------
  |Off  On |
1 | X      |
2 |      X |
3 |      X |
4 | X      |
5 |      X |
6 | X      |
  ----------
for the second drive didn't work.

Can anyone explain the 6 switch positions and what they do and how I should
set them?  Thanks.

-- 
Jon Zeeff (NIC handle JZ)	 zeeff@b-tech.ann-arbor.mi.us

Technical Details

Message-ID: <+BS+Q0$@b-tech.uucp>

Path:

arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rutgers!apple!usc!zaphod.mps.ohio-state.edu!caen!ox.com!b-tech!b-tech.ann-arbor.mi.us!zeeff

Show Full Headers

Complete Article Headers

Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rutgers!apple!usc!zaphod.mps.ohio-state.edu!caen!ox.com!b-tech!b-tech.ann-arbor.mi.us!zeeff
From: zeeff@b-tech.ann-arbor.mi.us (Jon Zeeff)
Newsgroups: comp.sys.ibm.pc.rt
Subject: Switches on RT E70 drive
Message-ID: <+BS+Q0$@b-tech.uucp>
Date: 15 Jan 91 23:19:18 GMT
Sender: zeeff@b-tech.ann-arbor.mi.us (Jon Zeeff)
Distribution: usa
Organization: Branch Technology
Lines: 51