Garry,
this is a known bug in mkfs.btrfs, the workaround for now is to run balance on FS having some data. so that unused group- profile will go away. HTH, Anand On 12/18/2013 10:03 AM, Garry T. Williams wrote:
I have been using btrfs for my /home partition on my home machine for a few years now. I created the file system RAID1 using two disk partitions. Recently I noticed btrfs fi df shows extra Data, System, and Metadata allocations. And btrfs fi show indicates extra allocations on one of my disk drives accounting for the 20 MiB allocation in the df display. I'm confused. What does this mean? garry@vfr$ sudo btrfs subvolume list /home garry@vfr$ sudo btrfs filesystem df /home Data, RAID1: total=32.00GiB, used=21.01GiB --> Data, single: total=8.00MiB, used=0.00 System, RAID1: total=8.00MiB, used=12.00KiB --> System, single: total=4.00MiB, used=0.00 Metadata, RAID1: total=15.00GiB, used=424.60MiB --> Metadata, single: total=8.00MiB, used=0.00 garry@vfr$ sudo btrfs filesystem show /home Label: none uuid: 6c3aeff6-9a50-4481-a175-7b98980eb638 Total devices 2 FS bytes used 21.43GiB --> devid 1 size 373.76GiB used 47.03GiB path /dev/sda4 devid 2 size 373.76GiB used 47.01GiB path /dev/sdb4 Btrfs v3.12 garry@vfr$ If it matters, I create a snapshot each night and run a rsync backup to another drive and then delete the snapshot. garry@vfr$ uname -r 3.11.10-200.fc19.x86_64 garry@vfr$ rpm -q btrfs-progs btrfs-progs-3.12-1.fc19.x86_64
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