Hello, I had an umountable FS, no kernel oops, just "mount /backup" which still running after hours, without throwing any IO to disk. From the FAQ https://btrfs.wiki.kernel.org/index.php/Problem_FAQ I saw to try with (-o recovery) then (-o ro). The recovery didn''t help, but the "ro" option works fine, thanks ! So now ? I have a FS in read-only, is there something I can do to fix it ? "btrfsck --repair" is killed by OOM (it use 14GB of RAM !) If it can help : # btrfs fi df /backup/ Data: total=1.72TB, used=1.65TB System, DUP: total=64.00MB, used=208.00KB System: total=4.00MB, used=0.00 Metadata, DUP: total=39.20GB, used=35.38GB Thanks for any help, Olivier -- 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