Thanks Andrew, but I ended up completely screwing it up by repeatedly trying to install/uninstall dkms, the drivers, etc and then it said it couldn't even start the driver install because there were no kernel sources, and I couldn't install them using sudo apt-get install kernel-sources.... I gave up, and blew it all away and I'm reinstalling. I don't suppose anybody has ever successfully backed up an MD (from /usr/pluto/diskless...) and restored it have they?
I want to avoid going through the pain of getting the 8168 driver working again for this MD, so I tarred the entire folder. I figured I would turn on the MD, let it get discovered and build the image/DB details. Then blow away that directory and restore from the tar... do you think that would work?