Re: The BOFH Strikes Again
We had an entire data center "go quiet" once for a semi-related reason. The EPO button (emergency power off or Big Red Button) can be wired one of two ways, normally closed or normally open.
Normally closed is similar to a light switch that is always on and flipping the switch kills the power. That's how this one was wired. Even though everything had preventive maintenance twice a year, "everything" did not include that 20 year-old push button and its wiring screws slowly loosened up.
Then one day someone came into the data center and when the door closed behind them, the door next to the Big Red Button, it got very quiet.
The electricians said someone had pushed the button and the person who walked in was worried he was going to lose his job, But the security cameras showed he was nowhere near it.
The EPO button is now wired as normally open...