My system spec's are as follows:
Hp Proliant dl385 g7 server
64gigs of ram
24 amd cpu cores at 2.1ghz
32gb lexar flash drive for FreeNAS os
LSI hba controller for the drives
8-1tb drives set up in raid-z2
Smart data says the drives are all good
4 gigabit NICs setup in a load balance aggregation...