I'm trying to at least get going with NetBSD. I grabbed all of the
snapshots from stanford, got a spare disk, and followed the guidelines
for laying down the bootblock and miniroot on the disk. The disk is
fresh out of the box from the factory, with no previous label or OS on
it.

>From Ultrix, I did 'cat bootblock miniroot > /dev/rrz3a'
Then I used the disklabel util to modify the partition to suit the disk.
It now reads:

# disklabel rz3
# /dev/rrz3c:
type: SCSI
disk: FUJITSU 
label: M2263S-512
flags:
bytes/sector: 512
sectors/track: 53
tracks/cylinder: 15
sectors/cylinder: 795
cylinders: 1658
rpm: 3600
interleave: 1
trackskew: 7
cylinderskew: 14
headswitch: 0           # milliseconds
track-to-track seek: 0  # milliseconds
drivedata: 0 

7 partitions:
#        size   offset    fstype   [fsize bsize   cpg]
  a:   131072        0    4.2BSD     1024  8192     0 # (Cyl.   0 - 164*)
  b:   131072   131072      swap                      # (Cyl. 164*- 329*)
  c:  1312080        0    unused     1024  8192       # (Cyl.   0 - 1650*)
  d:    65536   262144    4.2BSD      512  4096    16 # (Cyl. 329*- 412*)
  g:   984400   327680    4.2BSD     1024  8192     0 # (Cyl. 412*- 1650*)

I've taken this disk (and tried all of the snapshot variants, even 
without changing the partition label, i.e. using the label supplied in
the bootblock), put it's SCSI id to 0, and tried to get it to boot on all 
of the machine types we have here:

type		boot command			result
----		------------			------
DS2100		boot -f rz(0,0,0)/netbsd	Can't boot 'rz(0,0,0)/netbsd'
DS5000/133	boot 3/rz0/netbsd		Can't boot '3/rz0/netbsd
DS5000/260	boot 3/rz0/netbsd		Can't boot '3/rz0/netbsd'

I must be doing something wrong. Can anyone suggest any alternatives?
Are these machines not supported in the miniroot? Do I have to find a 
DS3100 to get this stuff up and running?

Thanks,
--
James S. MacKinnon           Office: P-139 Avahd-Bhatia Physics Lab
Department of Physics        Voice : (403) 492-8226
University of Alberta        email : Jim.MacKinnon@Phys.UAlberta.CA
Edmonton, Canada T6G 2N5
        WWW:   http://www.phys.ualberta.ca/~jmack/jmack.html