E,
Slightly OT, but...
3. It's very unusual for a redundant power system
to fail like this.
=================================================
The "redundant" in "redundant power system" makes this sort of thing
very unlikely. For example, if you have two systems with a 1%
probability of failing, the probability that both will fail is one
one-hundredth of 1%.
Well, if it is not the "crossbar" that fails.
In _theory_ it is a good approximation to do a multiplication on the
probabilities - however, electrical engineering has some more things to
say :-) For example the switch (or controller, or whatever) that
connects the two power supplies to the power bus has to have a
probability of failing lower than the above mentioned P*P.
...or you can have a 10000MV surge on the mains voltage, so no matter
how many redundant suppies you have, the smoke rises :-)
Anyways... use a cluster. ;-)
- Cs.
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