Hi, I just finished a new build and thought it wise to update bios on Gigabyte GA-EX58-UD5. The PC was clean with no software installed other than drivers and Vista 64bit. I had 2 drives installed under RAID 1, controlled by the Intel controller. When the machine restarted the bios went to default set up and non raid The machine booted to windows, and the Intel software reported a missing disk. No matter what I did the machine would not restore the array because the second disk was marked as a system disk. In the end I deleted the array and had to do a full re-install of Vista. Thank god It wasn't a year on and I had installed numerous apps, data and programs, so re-install was no hardship. Does Intel RAID 1 fail often? You could argue in this case Intel RAID didn't fail and the dumb arse updating the bios should have got into bios before reboot, but it seems a thin line to failure to me.