Hello. I am experiencing "No space left on device" with a btrfs file system, yet I cannot seem to find any exhausted resource. Could some resource I do not know about be exhausted, or is this caused by something else. Below is a trace of information that might be usefull, please let me know if there is anything I can do to resolve the issue. /Jakob [jakobt@soda ~]$ uname -a Linux soda 3.12.8-1-ARCH #1 SMP PREEMPT Thu Jan 16 09:16:34 CET 2014 x86_64 GNU/Linux [jakobt@soda ~]$ btrfs --version Btrfs v3.12 [jakobt@soda ~]$ mount ... /dev/sda on /data type btrfs (rw,relatime,nospace_cache) [jakobt@soda ~]$ df /data Filesystem 1K-blocks Used Available Use% Mounted on /dev/sdb2 76594224 49247368 23433028 68% / [jakobt@soda ~]$ btrfs filesystem df /data Data, single: total=1.82TiB, used=518.04GiB System, DUP: total=8.00MiB, used=204.00KiB System, single: total=4.00MiB, used=0.00 Metadata, DUP: total=1.00GiB, used=767.70MiB Metadata, single: total=8.00MiB, used=0.00 [jakobt@soda ~]$ touch /data/jakobt/hat touch: cannot touch ‘/data/jakobt/hat’: No space left on device [jakobt@soda ~]$ sudo btrfs fi balance start /data ERROR: error during balancing '/data' - No space left on device There may be more info in syslog - try dmesg | tail [jakobt@soda ~]$ dmesg | grep tail -n 2 [1113177.878157] btrfs: device label Data devid 1 transid 44784 /dev/sda [1113507.641752] btrfs: 1866 enospc errors during balance [jakobt@soda ~]$ sudo umount /data [jakobt@soda ~]$ sudo btrfsck /dev/sda ... cache and super generation don't match, space cache will be invalidated .. found 172181366447 bytes used err is 0 total csum bytes: 418841160 total tree bytes: 805187584 total fs tree bytes: 247164928 total extent tree bytes: 26329088 btree space waste bytes: 164771401 file data blocks allocated: 561564688384 referenced 511759908864 Btrfs v3.12 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html