HALT, CONTINUE ==> CRASH. HUH?

This is what happens on some of my MicroVAX 3100 systems. So far, the
best I can find that's common is that my model 95's work fine but my
model 80's crash.

Can anyone help? Why are my 80's crashing?

I tried adding the ECO kits to a VMS 6.2 system hoping that would help
but it didn't. I got various reasons for crashing:

**** Fatal BUG CHECK, version = V6.2 SSRVEXCEPT, Unexpected system
service e
**** Fatal BUG CHECK, version = V6.2 INVEXCEPTN, Exception while
above ASTDE
**** Fatal BUG CHECK, version = V6.2 INVEXCEPTN, Exception while
above ASTDEL or on interrupt stack
**** Fatal BUG CHECK, version = V6.2 INVEXCEPTN, Exception while
above ASTDEL or on interrupt stack
**** Fatal BUG CHECK, version = V6.2 SSRVEXCEPT, Unexpected system
service exception
**** Fatal BUG CHECK, version = V6.2 BADQHDR, Interlocked queue
header corrupted
**** Fatal BUG CHECK, version = V6.2 INVEXCEPTN, Exception while
above ASTDEL or on interrupt stack
**** Fatal BUG CHECK, version = V6.2 BADQHDR, Interlocked queue
header corrupted
**** Fatal BUG CHECK, version = V6.2 BADQHDR, Interlocked queue
header corrupted
**** Fatal BUG CHECK, version = V6.2 BADQHDR, Interlocked queue
header corrupted

Sometimes it just hangs and I have to manually boot.

My systems are running VMS 6.1, 6.2, and 6.2 with all relevant ECO's.
I've found no correlation between VMS version and crashing, but I
didn't get to try VMS V6.1 running on a Model 80.

This is of concern because power-cycling the terminal server which I
use for console sessions causes any connected systems to HALT. This is
also of conern because we are moving to a new data center sometime
next year and the boss wants it to be "lights-out" -- which leads to a
bonus question: What's the deal with lights-out? Is this just to
minimize entries into the data center? What about when you need to
swap hardware? Add servers? And isn't it a good idea to at least
inspect the data center once in a while to make sure something like a
leak from the ceiling isn't developing?

Any friendly advice welcome.

Thanks!

AEF

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