Hi folks... I'm the proud(?) owner of a Decstation 2100 running netbsd. 
[1] :)  I installed it off the network, using a linux machine for
rpc.bootparamd, and an alpha running Digital Unix for NFS and tftp. 

The first major problem I had was not being able to find any machines with
a working rpc.bootparamd -- Digital Unix doesn't ship with one, and sun's
version doesn't listen to broadcasts. [2]

Disklabeling of the rz23 and two rz57s went off without too much of a
hitch, [3] and after I figured out where things went, the system seemed
rather happy.  Now to finish configuration, and get my 5000/240 at home up
and running.  :)

Thank you, NetBSD/pmax folks!  You've rescued a bunch of machines from a
dark fate.  [4]  :)  (Now if I could only get bash to compile...)

[1] well, as proud as one can be of a 12MHz R2000.  :)
[2] and RedHat 5.0 doesn't seem to ship with one, either.  <sigh>
[3] there is of course the strange "partition will shrink" problem
    which is dealt with by writing to rz0a instead of rz0c...
[4] there's about half a dozen or so of these 2100s/3100s rotting away in
    a trailer here at Reed, and I figured they deserve something better
    than ending up stripped for parts.

----
  Aaron J. Grier  | "Not your ordinary poofy goof." | agrier@poofy.goof.com
  agrier@reed.edu |  agrier@metro.grumblesmurf.net  | ...!reed!vla!agrier
  DECBEE65 0DEE3A0C 1ED7F54D 9E023CC4 and 0x0663D1A9 at a server near you.