Being as I love minor disaster anecdotes where doing all the "right things" seem to not make any difference :).

We had a rack in data center, and we wanted to put local UPS on critical machines in the rack.

But the data center went on and on about their awesome power grid (shared with a fire station, so no administrative power loss), on site generators, etc., and wouldn't let us.

Sure enough, one day the entire rack went dark.

It was the power strip on the data centers rack that failed. All the backups grids in the world can't get through a dead power strip.

(FYI, family member lost their home due to a power strip, so, again, anecdotally, if you have any older power strips (5-7+ years) sitting under your desk at home, you may want to consider swapping it out for a new one.)

For sure, things can and will go wrong. For critical services, I’d want to split them up into separate racks for precisely that reason.

Re: power strips, thanks for the reminder. I’m usually diligent about that, but forgot about one my wife uses. Replacement coming today.