I have a FrankenFAS2240, made up out of parts from about 5 different systems, totally unsupported. I set it up initially with 12 drives, and then got some more and wanted to grow the ADP setup.
By default, putting these drives into the enclosure, they showed up as broken. The solution to this is from this NetApp Communities post – once the drives are labelwiped and set to spare, they are automatically partitioned.
From there, it’s just a matter of running disk assign for the data partitions, zeroing them, then adding them! Easy!