Bug#747629: systemd: boot fails w/ multi-whole-disk btrfs /home: "timed out waiting for dev-sda.device"

[Zack Weinberg]

Well, this is frustrating: now I can't reproduce the problem either.
(Reverted /etc/fstab to its previous state, rebooted several times
with no problems.)

To me this suggests some sort of race condition inside udev, and
perhaps I should just file a new bug if the problem comes back.