[PROBLEM] sudo: unable to write to /var/lib/sudo/xbian/: No space left on device

[psyLord]

Sorry for my delay. During the last week I tried different methods for solving the problem.

Resizing the main partition worked. I didn't got an 'No space left on device' error message any longer. I also could delete some files. Then I tried to delete the oldest snapshot with btrfs-auto-snapshot destroy. Here, something went wrong, because after rebooting the partition was read-only.

Then I plugged the SDcard in my linux PC and mounted it. Same problem. At this stage, it wasn't possible to do a backup anymore (I don't know why... everytime only ~34mb out of 7gb). I tried it with dd if=... of=..

Then I checked the filesystem with btrfs check. The result was the chunk tree was damaged. Therefor, I tried to repair it also with the btrfs tools.

Now the partition is not mountable any longer. (But I found a backup from some month ago, so not everything is lost.)

Next time I will do a backup as soon as a problem appears. (Then it should be possible to work directly with the backup instead of the SDcard.)