Comment 4 for bug 1383948

btrfs is not intended to be used this way any more than any other filesystem, which is to say not at all. If you intend to boot from that drive it *must* have a partition table to boot. If you insist on using a data disk this way ( and there really is no reason to -- are you really going to miss that 1 mb of space the partition table takes up? ), I believe this problem was due to some bugs in parted that were fixed in 14.10. Can you try that and confirm whether it has fixed this?