Software raid 0 with btrfs will make the two drives one but I have no idea how that works if you are still going to have separate encryption keys and params for the second physical drive. If they have the same encryption it should be possible to have the device mapper write to the software raid.

Rip dia

lowers barriers to adoption of the language and its ecosystem

Only had dialup when hedgehog was released and could not for the life of me figure out how to enable PPP