I know, I just wondered if there was anything installed on the drive that might affect it.
FWIW, I took a drive out of a RAID-1 configured DNS-323 and put it into a DNS-321 (in the opposite slot to allow for the reversed positions in the DNS-321), and the data was all accessible. Since I was knocking both of them flat and starting over with EXT3, I figured it was a good time for the experiment.
I guess that answers the question too...