SUMARY: Adding an external scsi disk

From: Javier M. Pereira <javier_at_eui.upm.es>
Date: Fri, 26 Jan 1996 17:21:12 +0100 (MET)

Question:
========

  We have an alpha 2000 running osf 3.0

  We just have an internal scsi disk and we want to add an external
  scsi disk. The disk we want to add is not a DEC disk, so its
  specifications are not in /etc/disktab.

  We gave the disk scsi ID 5 (and tried with 4 too)

  We followed the manual, boot from genvmunix, created a new kernel
  using doconfig, and finally, after booting from that new kernel we
  created the new nodes with MAKEDEV rz4.
  So far everything went fine.

  BUT when we mede a disklabel

# disklabel -w -r rz4 RZxx

  It did not work, RZxx was not found.

Last week we did the same operation with another disk (not a DEC disk
either) and it worked with RZxx, and RZxx was not in /etc/disktab.

  Is it a problem of the disk?
  Is it a problem of the kernel configuration?
  Is it a problem of /etc/disktab?

  What is happening to us? Any clues will be appreciated,
  TIA

Answer:
======

The external SCSI bus is the B bus, so the unit ids need to have 8 added to
them
For instance:

Unit 5 on the B SCSI bus needs a MAKEDEV rz13 (8+5=13)

So then the disklabel command becomnes disklabel -w -r rz13 RZxx.


thanks to:
=========

alan_at_nabeth.cxo.de
Dr. Tom Blinn
Brian Sheehan
Brian Sheehan
David R Courtade
Bertrand Hutin
Lucien HERCAUD_at_par
John Richards

------------------------------------------------------------------------------
    _/_/ _/_/ | Javier Martinez Pereira
   _/ _/ _/ _/ Centro | Escuela Universitaria de Informatica U.P.M.
  _/ _/ de | Phone: 34 +1 3367901
 _/ _/ Calculo | E-mail: javier_at_eui.upm.es
  _/_/ _/_/ | Just ones & zeros
Received on Fri Jan 26 1996 - 17:50:08 NZDT

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