On Mon, 27 Jul 2015 at 10:49 Marcus Furlong <furlongm@gmail.com> wrote:

I have the same issue, with btrfs on /dev/sdb1 and /dev/sdc1. Around
half the time, it doesn't mount on boot. When debugging, I discovered
that it does actually mount for less than a second and then it
automatically unmounts.Changing from /dev/sdb1 to /dev/sdc1 made no
difference.

Sounds like my problem. How did you work out that systemd unmounts it?

I asked on the #btrfs irc channel recently and there was a suggestion
that the issue was related to udev rules:

So no solution or work around then?

Thanks