Have two data suites. Job done.
Had a fairly recent job where the client (owner/operator) had a project constructing a new data processing facility supporting a business-critical process. Half-hearted spec that they'd written themselves specifying a gaseous extinguishing system, but manually operated (close to useless, IMHO - especially as the building was usually unstaffed). Nothing else about fire protection at all - despite the fact that the most critical facility was on a first floor.
We got involved & managed to persuade them to follow BS 6266 & I ran a formal risk assessment workshop with all the key stakeholders represented. One of the first questions I asked was "...
is there a back-up facility..."? They said they didn't need one, because they had the fire extinguishing system. I pointed out to them that the manual extinguishing system (even if properly designed, installed & maintained - which they rarely are, in my experience) would only reduce (not eliminate) fire risk, & there were a whole host of other risks (flood, complete power supply loss etc, etc...) that it does nothing to mitigate. Nevertheless they stuck with the single facility (primarily because the decision had already been made) and we spec'd Novec - automatically fired, together with a whole host of other fire protection & management measures. Job done. 6 months later - just before construction - got an email from the client's lead PM... "
If we were to have a back-up facility, would we need all this expensive fire engineering..."?