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Those systems are set up so that responsibilities are split; one person alone doesn't have the knowledge to knock everything out.

That would be difficult to implement in this case. How are you going to un-teach one of the team members that fire near computers is bad?

Separate rooms with separate access control for redundant systems. Preferably made so fire from one room does not spread to the next.

I think that's a different concept to the “Two-Man Policy/No Lone Zone” mentioned above.