> The problem is that fasttrak doesn't have an option for jbod, or > normal ide mode. For what ever reason promise does give you an option > to create a normal drive in their bios menu. As odd as it sounds you > can create a raid0 array with one drive. Trust me it works despite > being completely wrong in so many ways. In fact I think it will let you > create a mirror with one drive as well. Ahh - that's worked! I can now boot off either disk. Thanks Samuel. I'm now trying to test the procedure for adding a replacement disk to the array, but the documentation on this is pretty skimpy. I'm actually mildly shocked by this - the section on "Reconstruction" in the Software RAID Howto is bordering on the comic, and there's no documentation at all for mdadm, it seems. So I'll see if this works: http://www.e-smith.org/docs/howto/RAID-recovery-howto.html At least it has a date on it... Jonathan