hanging uvaxIIs

[D0430 at PUCC.BITNET]

note
[I posted this earlier but because of mail problems I don't think
it ever got out]
 
We have a pair of uvaxIIs running ultrix 1.1 with RFS (remote file system)
I believe we have the most recent corrections for RFS.  Several times this
past week both machines have gone into some kind of tight loop, without
any sort of panic or error message.  Consoles and all terminals were locked out
Forcing a reboot on one machine fixed the problem, and the last time it
unclogged itself after about 20 minutes without a reboot.
We have the upgraded DEQNA cards, but still have the old ultrix driver.
 
1) Has anyone had any similar experiences?  What did you find?
2) How do I force a kernel core dump in this state to attempt to debug
   the problem?  I guess I have to go into console mode somehow since
   the console is dead on-line.   Does anyone know how to do this?
 
Thanks, thanks, thanks.
 
Paul Lansky
Music Department
Princeton University        .....princeton!winnie!paul
609-452-4241                (bitnet == D0430 at PUCC)