We have a new F520 to replace our F220. The 520 came with one disk shelf, and the 220 has two disk shelves that I want to attach to the 520, so that the 520 ends up with three disk shelves and the filesystem from the 220. Does it suffice simply to plug in the two disk shelves from the 220, or is there something else that needs to be done to transfer the filesystem from the 220 to the 520?