i have a HP ML10v2 with the following specs:
Intel Xeon E3 1230v3
16GB Kingston ECC
Onboard sata controller in AHCI
2x2TB WD RE4
8GB Kingston USB2.0 (FreeNAS)
i installed FreeNAS 11 on the server (after applying the latest SPP for the server) and set up both 2TB drives in a mirror.