Autzoo.1223
hacknews
utzoo!henry
Wed Dec 16 23:04:32 1981
DZ madness again
Once again the DZ driving tty24-31 flaked and a reboot was needed.  The
interesting part is that this is not the same DZ as before!  The old
suspect is DZ D, which is on the bus as of this afternoon but is
otherwise totally inert;  those ports are now being run by DZ F.  It
would seem that it's not a problem with a specific DZ.  Why it always
hits those ports is a good question, although there is one suspicious
thing:  in all the cases so far where I've been on the scene, the CSRG
line has been in use at flake time.  Perhaps heavy input traffic has
something to do with it.  If it happens once or twice more, I will pull
DZ D back off the system and see if that cures it.  If so, then either
there is something really weird wrong with D or else it's a general
bus-loading problem.  If not, hmmm.