RAIDar stopped detecting the device. Decided to try something. Removed both of the disks and started the Duo. RAIDar picked it up. Next I shut down the Duo, put in just disk 1 and tried a reboot. Got stuck with the flashing blue LED and again nothing showed up on RAIDar. Shut it down, took out disk 1 and put in disk 2 then tried to boot the Duo. This time it booted up fully, showed up in RAIDar and was fully accessible.
Looks like disk 1 was the problem.