Likey codes or building management wouldn't let them make the necessary modifications to safely install a Halon system

If those go off, they end up destroying hard drives (the spinning kind), due to the sound pressure....

So fire suppression and data centers don't mix too well

Other datacenters we built had them (which scared the shit out of me tbh). I don't remember why this one had to stay on sprinklers.

Or CO2 but that's a life or death situation if there's any people still inside

Probably not safe to use on a floor that has people on it.