I ran btrfsck three times and tried to restart the OS. After a generation_v2 resetting it booted and now it works! :)
Thank you very much for your help! Two btrfsck run was needed for the complete cleanup, but interestingly the end statistics were a little bit different each time. Specifically, the values of - total fs tree bytes: 2285948928 - total extent tree bytes: 303124480 - btree space waste bytes: 742282214 lines varied with each run, even if there were no need of repairing. Ákos -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
