Per the quick specs for HP Proliant DL380p Gen8
"NOTE: The optional +8SFF drive bay requires an additional internal storage controller be selected. HP recommends the HP Smart Array P420/1GB FBWC 6Gb 2-ports Int SAS Controller (P/N 631670-B21)."
Per this Smart Array product page the internal HP Smart Array P420i/P420 max drives is "Up to 27 internal".
Why is a second P420 controller required for 16 SSF (8 SFF and optional 8 SFF drive cage) drives?
Thanks,
Dan