That seems ill advised, one of the benefits of btrfs is it obviates the need for lvm and mdadm.<p>I guess in your case you have a more stable raid5&#x2F;6 opportunity, but you&#x27;re losing many of the raid benefits present in btrfs natively.  I&#x27;d also imaging it could be slower or introduce IO issues others haven&#x27;t tested.  Though I really have no idea, never seen anyone do that before.