
Intel DX58SO2 Whitebox - Working including onboard network
VM ServerCase: Thermaltake Element V
MB: Intel DX58SO2
CPU: Intel i7 950 with Hyper Threading - 8 logical processors available
Memory: 24GB Corsair PC-12800 1600MHz
LAN: 2x On board - works out of the box

2nd NIC set as redundant
Controller: Adaptec 2405
Storage Drives: 4x Western Digital RE4 500GB in Raid 10 array
Boot drive: 4GB Lacie mini USB stick
Onboard SATA: Used for DVD drive only as RAID arrays are not available to ESXi 4.1
DVD: Liteon DVD-RW Sata Black
VT-d: tested and working
ESX versions tested: 4.1, 4.1 U1
note: Neither USB3 ports or eSata ports work in VT-d passthrough mode. I challenge someone to get these working
Virtual File Server SetupVirtual File Server: Server 2008 R2 Standard
VTd Storage controller: Adaptec 6805 with AFM600 BBU
Passthrough Storage Drives: 8x Western digital RE4 2TB in Raid 6
Works brilliantly but required 2 host restarts to install, once to install the card, and a second time to configure the host to make the controller available to guest. The purpose of this was to get around the 2TB maximum size limitation with ESX as I wanted a virtual file server wth a single 12TB drive.
The controller can be fully managed using the Adaptec Storage Manager software that I installed on the virtual file server. Note: must use the latest version of ASM to manage the Adaptec 68xx series controllers... 20 minutes of wasted time.
Potential issues with this setup:
Obviously this would not work if I was using 2 or more ESXi hosts and tried to vMotion the VM.
All guests and the host have to be restarted if adding more disks to the controller or changing any RAID settings.