[PLUG] BTRFS showing full when it isn't

[Tyrell Jentink]

I'm using BTRFS on a Fedora 20 server.  My kernel version is 3.17, and my
BTRFS version is v3.17. My pool is composed of 2 identical 3TB drives; Some
details on my system:

#btrfs fi show
> Label: none  uuid: 4f4b4c32-dc58-4288-a0d1-98db185dd429
>         Total devices 2 FS bytes used 101.25GiB
>         devid    1 size 2.73TiB used 103.03GiB path /dev/sdc
>         devid    2 size 2.73TiB used 103.01GiB path /dev/sdd
> Btrfs v3.17


Which is consistent; I have the two 3TB drives, each actually reporting
2.73TB.  The 103 GB is interesting though, see below:

#btrfs fi df .
> Data, RAID1: total=102.00GiB, used=101.13GiB
> Data, single: total=8.00MiB, used=0.00B
> System, RAID1: total=8.00MiB, used=16.00KiB
> System, single: total=4.00MiB, used=0.00B
> Metadata, RAID1: total=1.00GiB, used=118.70MiB
> Metadata, single: total=8.00MiB, used=0.00B
> GlobalReserve, single: total=48.00MiB, used=0.00B


Why am I only getting 102GB of data space?

Google presented me a bunch of similar problems, but all of the ones I
looked at were 1) running out of either meta or data space, 2) using
devices of different sizes, or 3) needed to re-balance the pool (Normally
resulting from either 1 or 2). My problem doesn't seem to match any of
those scenarios, and my google-foo can't seem to get me any different
suggestions.

Are there any BTRFS gurus on this list that might be able to help?