On Wed, 8 Jul 2015 at 21:50 Chris Samuel <chris@csamuel.org> wrote:

No, what happens with BTRFS RAID-1 is that you only get 2 copies of data on
different device, no matter how many devices you have.

Oh, OK, so I misunderstood.

So in other words, using BTRFS RAID-1 is fine if you have exactly two disks?