Hallo, Nikos, Du meintest am 21.10.11: > What went wrong in the following scenario? BTRFS thinks that a device > is mounted while it is not. [...] > btrfs device scan /dev/sdh > Scanning for Btrfs filesystems in '/dev/sdh' > ERROR: unable to scan the device '/dev/sdh' - Invalid argument > ## Comment: OK, we give up. Try to recreate btrfs from scratch > mkfs.btrfs -m raid1 -d raid1 /dev/sdg /dev/sdh /dev/sdl > WARNING! - Btrfs Btrfs v0.19 IS EXPERIMENTAL > WARNING! - see http://btrfs.wiki.kernel.org before using > /dev/sdh is mounted > ## Comment: Of course /dev/sdh is not mounted. > mount |grep /dev/sdh > root@lxc:~# Two days ago I've seen a perhaps similar problem with an ext3 disk: Connected via USB running fsck (with some options) mount /dev/$disk $mountpoint also told that the disk was mounted (it wasn't really). Maybe some other operation (like - in this case - fsck) on/with the disk leads to this wrong message. Viele Gruesse! Helmut -- 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
