When attempting to do remote boot with one port from an on-board (Dell PE720) i350-T4 as primary and one port on an add-on i350-T2 as secondary, I am unable to get Windows (2008 R2 w/SP1 & 2012) to recognize the "drive" during setup. I tried switching the primary/secondary roles of the T2 and T4 cards with the same behavior. The volume connects successfully to our iSCSI SAN and everything looks perfectly normal during POST as well.
We have 30 or so servers in our datacenter booting from our iSCSI SANs using similar configurations and I haven't run into any issues with those. All of the other servers are using older Intel or Broadcom adapters and work great booting from the SAN.
Is there something else I need to do to get this working? Is there a missing driver somewhere that needs to be loaded at OS installation time?