On Wed, 16 Nov 2016 11:25:00 +0100 Martin Steigerwald <martin.steigerwald@xxxxxxxxx> wrote: > merkaba:~> mount -o degraded,clear_cache /dev/satafp1/backup /mnt/zeit > mount: Falscher Dateisystemtyp, ungültige Optionen, der > Superblock von /dev/mapper/satafp1-backup ist beschädigt, fehlende > Kodierungsseite oder ein anderer Fehler > > Manchmal liefert das Systemprotokoll wertvolle Informationen – > versuchen Sie dmesg | tail oder ähnlich > merkaba:~#32> dmesg | tail -6 > [ 3080.120687] BTRFS info (device dm-13): allowing degraded mounts > [ 3080.120699] BTRFS info (device dm-13): force clearing of disk cache > [ 3080.120703] BTRFS info (device dm-13): disk space caching is enabled > [ 3080.120706] BTRFS info (device dm-13): has skinny extents > [ 3080.150957] BTRFS warning (device dm-13): missing devices (1) exceeds the limit (0), writeable mount is not allowed > [ 3080.195941] BTRFS: open_ctree failed I have to wonder did you read the above message? What you need at this point is simply "-o degraded,ro". But I don't see that tried anywhere down the line. See also (or try): https://patchwork.kernel.org/patch/9419189/ -- With respect, Roman -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
