Vivek, I retain RAID setup on the SBUU installation, there are no error when going through all the setup process of SBUU, but after the first time auto reboot, the server try to boot from the RAID disk but it shows the operation system cannot found on the disk.
I use the same RAID setup but use the MS 2008 R2 installation disk to boot the server directly, it can boot successfully, and I import the onboard RAID driver manually, it can show all the VD, and I can install the OS on the VD no problem. Sure I need to install all the driver back manually after the OS installed successfully!