Cannot automount filesystem via /etc/fstab

This problem:

  1. Created mdadm RAID1 array with two devices => /dev/md126
  2. $ mkfs.btrfs ... /dev/md126
  3. $ mount /dev/md126 /mnt works as expected.
  4. Edited /etc/fstab:
/dev/md126	/mnt	btrfs	defaults,noatime,compress=lz4,commit=120	0 2

now the test mount -a gives:

$ mount -a
mount: /mnt: wrong fs type, bad option, bad superblock on /dev/md126, missing codepage or helper program, or other error.

Am I missing some package? Same behavior with f2fs and/or using UUIDs. Manjaro installed manually, stable branch updated.

see man mount :
-t is required , here btrfs

Oh… stupid thing. Assumed LZ4 is also supported, changed LZ4 into LZO and obviously works.