mike@BRL.ARPA (Mike Muuss) (10/24/85)
At BRL we operate a 3-node Hyperchannel network which has
it's share of problems. One node attaches to a CDC Cyber,
and the other two are A440 ("minicomputer adaptor") nodes,
using the PI-13 UNIBUS interface.
About once a week or so, one of the three PI-13 boards
in the network will get "stuck", and powering the
A440 off and on does not help, nor does performing a
UNIBUS INIT. Only removing power from the PI-13
and restoring it will clear the condition. This can be
a real nuisance.
Also, several times a month, each Hyperchannel adaptor
will signal a power-off, power-on transition which none
of our PDUs claim existed. This is curious, but not
particularly harmful.
My question is: has anybode else on the list had similar
experiences with Hyperchannel equipment, and are there
known fixes? The vendor has not been very helpful
trying to track this problem down.
Best,
-Mike