DEQNA/DELQA cab kits the same or different? - test-drb@ccmp.vtda.org

3 Apr 2009

"Paul Koning" <Paul_Koning at Dell.com> wrote:

...
   > I
 > have been told that the DEQNAs had problems and would lock up or
 > experience
 > other reliability issues. DEQNAs are not supported after about VMS
 > 5.4/5.5,
 > which is why I need a DELQA. I am not sure what the minimum VMS  version
  > is
 > for DELQA though.  
 DEQNAs never worked right, even after 12 revisions.  That's why they
 were dumped and the LQA was created.  For moderate loads a QNA should be
 ok, though.  The big problem was that they weren't good enough for Local
 Area VAXcluster use, which was a big thing in those days.  I don't think
 DECnet was thrilled with them either but DECnet was more tolerant of
 misbehavior.

 I don't remember DEQNAs being dumped by the PDP11 operating systems. 
That's because they haven't been. :-)

I actually have an interesting reverse behaviour, where I can get a 
DELQA to freeze on my 11/93 running RSX, while a DEQNA will continue 
working fine.
(I do suspect it is because the extra care DECnet takes to keep a QNA 
ticking which saves me, but anyway... Interesting...)

And to answer the OP: the cab kits are the same, modulo the letters 
under the connector.

	Johnny

-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt at softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol