OTOH you have BTRFS where you can use whatever you want, and just find all disks using the filesystem ID to join the array. Works like a charm and you never have to think about it.
ZFS does that too, the top-level comment was just uninformed. You can shuffle your disks around, move them to other machines, and even move the contents to different physical drives and ZFS will still automatically find them all using metadata written to the disks called the "zpool label".
