I still cant get it working ...
I tried to format each of the new disks individually, and they work perfectly.
When I made a new Raid5 volume, it created fine. Then, windows detected new hardware of type "disk", and it shows up in Device Manager.
But, it doesnt show up in Disk Manager at all, even after a rescan. Oddly, Disk1 is missing in the Disk Manager as well, and my old Raid volumes are listed as Disk0 and Disk2.
Any ideas, anyone?