> I used the same PlexWriter PX-W1210S drive on the AS 200, PWS 500 and
> 3000/400.  I tried connecting its Block jumpers for the latter but
> that didn't help.
> 
> Do you know what the problem could be?

hmm... I burned the multi-arch ISO on an /i386 with an HP IDE burner,
and it booted on my 3000/400 with rd42.  and if the disc is booting
without trouble from other alphas, it's likely some drive issue.  do you
have any other drives available to try booting from?

-- 
  Aaron J. Grier | "Not your ordinary poofy goof." | agrier@poofygoof.com
      "It's not fast, but why not?"  --  John Klos on VAX dnet client
  "because it needlessly contributes to global warming?"  --  Paul Vixie