I really don't know what the proper procedure should be in a data center when the big klaxon goes off and you here those fateful words over the intercom, "Close all doors, DIVE, DIVE, DIVE!"
So true, my first experience with halon was a briefing at IBM about their machine room policies (I was a student intern) and they stressed that when the fire alarm went off, even if you knew there wasn't a fire, you evacuated the room because when the halon dumped if you didn't have your own source of oxygen it was game over.
