After initial install of KT266A motherboard and raid setup machine worked fine until first reboot. Fasttrack reported array critical. Could still boot from single drive, but mirror had to be rebuilt. This was followed by failures to rebuild and more raid failures on reboot. Tried a lot of stuff until I found a Q&A tucked away on page 51 of MB manual that stated I could not put a scsi card in pci slot #2 because it shares an INT with the onboard RAID. I didn't have a scsi card in slot 2. I did have a Firewire card however. I moved the card. No more RAID failures. It doesn't make sense that the RAID controller would share an INT with ANYTHING. It's too critical. Now I won't plug anything in PCI slot #2.
One of the things I did with my Dragon+ was to read the manual front to back before I did anything, then I read it one more time, all went very smooth, only had minor modem problems, but that was the modem itself, replace it and all is well, this is a very sweet motherboard.