> > So if time-to-recovery of a 1000-person 
> > server is 60% of time-to-recovery of a 2000-person server,
>
> <scary math equation snipped>  
>
> Isn't doing something in 60% of the time *twice* equal to 120%
> or 20% more total downtime?

I hate to say it, but the answer to that was in the scary
math equation :-)  In fact, you will have 20% more *server*
downtime, but each server has only half as many users.  So
therefore, your person-minutes of downtime is 60%, not 120%.
Of course, my 60% number was just a guess (the time
difference between fixing a 1GB store and a 2GB store
is not very large, but the time difference between fixing a 
50GB store and 100GB store is).

Peter

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