Reply to post: Buttons that you shouldn't press...

Crash, bang, wallop: What a power-down. But what hit the kill switch?


Buttons that you shouldn't press...

I once had a role that evolved into looking after a 60 rack Data Centre. It was located in the shell of a former 1960s computer hall although most of the vintage services had been stripped out or abandoned.I spent a year or so reverse engineering all of the services as the electrician who had worked on it over the years died in unfortunate circumstances.

Whilst we didn't have an ESD switch, the room did have an FM200 gas suppression system which was disarmed whenever staff lifted floor tiles.

One weekend, I received an urgent phone call from a colleague with the immortal words "There's been a bit of a cock-up". The gas system had gone off, two thirds of the cooling had shut down and Servers were gradually shutting themselves down due to localised overheating. Not knowing how the interlocks worked, I eventually got the Air Con up again by pulling the battery leads off in the alarm panel. (There was a discharge detection sensor that required a manual reset, something that went into the documentation once we were told about it). Fortunately, the cooling interlock wiring had not been extended to unit 3 (and standby unit 4) so we were able to avoid compromising the really important stuff.

It turns out the staff member got confused when re-enabling the fire panel and got it into his head somehow that it would reset if he pressed the button marked RELEASE under the hinged flap with the seal on.

Getting the FM200 replaced was another saga, it took weeks...

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