The current ubuntu has btrfs-tools 3.17-1.1 which I think can do mixed. https://launchpad.net/ubuntu/+source/btrfs-tools
** Changed in: btrfs-tools (Ubuntu) Status: New => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/833467 Title: there should be an 'unstable' version for testing new features like -M mixed metadata/data blocks To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/btrfs-tools/+bug/833467/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs