Hi, this is not really a bug in btrfs but to spread the info I will just drop this short message:
My System (VirtualBox VM, 3 virtual HDDs with 10G, 5G and 3G) is today installed Ubuntu 12.04 LTS 64bit with Kernel 3.2.0-26 generic, a /dev/sda hdd containing /boot with ext4 and / with btrfs. After installation update/upgrade process I created a new partition on /dev/sdb and /dev/sdbc with max available size - 5G for sdb1 and 3G for sdc1. Now I made my RAID: mkfs.btrfs -L MYRAID -d raid1 -m raid1 /dev/sdb1 /sdc1 and made this RAID available to the filesystem mount /dev/sdc1 /mnt The infos, given by "btrfs fi show /dev/sdb1" and "btrfs fi df /mnt" are ok, but df is "lieing": Filesystem Size Used Avail Use% Mounted on /dev/sdc1 8.0G 5.2G 56k 100% /mnt Don't get confused about used space, tried to write a 4G file on this RAID, which ended with "write error: no space left on device" - as expected FYI best Bernd Kohler -- UMIC - RWTH Aachen http://www.umic.rwth-aachen.de Mies-van-der-Rohe Str. 15 52074 Aachen Tel.: +49 241 80 20791 Fax: +49 241 80 22731 E-Mail: koh...@umic.rwth-aachen.de The future started 6/6/12 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 0100 1001 0101 0000 0111 0110 0011 0110
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