I wonder if anyone can point me in the right direction with this.  I'm 
trying to set sizes for the CFIs in an environment with > 200 hosts.  

I'm OK on sizing for file data but have been asked what the difference 
would be if we were to have 'Brick Level' backups as well as Storage Group 
backups.  

Sizing when backing up an SG is relatively simple as there are relatively 
few files albeit many logs.  However, in an environment with > 35,000 
users, I believe that the difference for 'Brick Level' backups would be 
dramatic.

Am I being overly negative on this..?  

JW

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