I have three hard-drives attached to a media pc via USB (yes, this is far from idea and I''m procuring the hardware to resolve this). As USB seems to be crap in general (or something is not working) the drives get dropped from time to time. In past times this hasn''t been an issue. I was able to force umount the stale mount point and re-mount with the new device names (/dev/sdb, /dev/sdc, /deb/sdd being re-written to /dev/sdd, sde, sdf). However, this evening when this happened the drives wouldn''t come back up. After speaking with darkwing in the the #btrfs room it looks as though the metadata is corrupt. I''ve gathered all the logs I could of the incident and aftermath in hopes that it will help lead developers to better error handling when poor fools, such as myself, attach large drives via USB. Kernel log of the dropping incident: http://paste.ubuntu.com/1029622/ btrfsck: http://paste.ubuntu.com/1029589/ btrfs-debug-tree after a reboot: http://paste.ubuntu.com/1029635/ btrfs fi show: http://paste.ubuntu.com/1029638/ Linux media-pc 3.4.0-4-generic #9~precise1-Ubuntu SMP Tue Jun 5 01:25:26 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux btrfs-tools 0.19+20120421-0daily6~bzr457~precise1 Running btrfsck with the --super options and --repair yielded the same results. If there are any additional logs I could provide or questions i could answer let me know. Thanks, Marco Ceppi -- 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