no, ultrix supports SMP from version 4 onward, on both MIPS and VAX. 
Though, i have heard it is not very good at it.. A friend of mine when i 
was in school told me about an 8000 series VAX that had been taken 
offline a couple years before i got there (to be replaced by a bunch of 
pmaxen and then sparc 20s), which ran ultrix, which they ran in sngle 
processor mode after they discovered it was actually faster than running on
both processors... so, ymmv. but yes, ultrix does do SMP. 

isildur

On Sun, 30 Dec 2001, =?ISO-8859-1?Q?Hans_H=FCbner?= wrote:
> Am I missing something?  In my memories, Ultrix does support only one CPU.  It
> would be a shame to have 5 idle CPUs, but if you insist on doing so, just send
> the unused CPU boards to my direction so that we can beef up vax6k.openecs.org
> :)