< I find power interlocks a pain, particularly on covers held down by scre
< (AFAIK many safety rules don't apply if you need a tool to gain access).
Most are their for two reasons on DEC hardware. One, so you don't pull
a card with power applied, instant fried system. The other is many of the
systems are air cooled and the cooling is not effective if the door is
open, running for extended period at elevated temperatures is a path
to lower reliability or worse.
In the alpha server that chip pumps out a lot of BTUs and cooling is
good karma.
Allison