Issues Installing v10.0

Hi,

I tried to do a clean install of v10.0 yesterday, but no joy (and lots of issues it seems). First, let me explain my setup .. I have 3 HDD's in the machine P0 and P1 (both 150 GB), and P2 (250 GB). They are all AHCI, though I have also tried to se up P0 and P1 as BIOS RAID (mirror, for redundancy).

1) BIOS RAID does not seem to work. Untangle sees the array, but refuses to use it ... is this really expected? Linux supports BIOS RAID, so confused here a bit.
2) I removed BIOS RAID, and tried to use mdadm to set up a Linux RAID array (during install, via the console). I can create the array, but Untangle refuses to use it - and says it will delete the array (no other option). Why is this the case, as it seems the array?
3) I gave up on RAID, decided to install on P2 (the 250 GB drive). This failed also though ... :-(. Untangle only worked if I installed on the first drive (P0). On P2 it didn't seem to properly install the boot information, and the machine would not boot. This one I'm guessing isn't as expected.

Any suggestions? I really would like RAID, but if not I'd like to be able to install on the third drive.

Thanks!