Well I've just tried to add a disk to another, but it fails. I created the first (starting with no traditional partitions) with: # mkfs.btrfs /dev/sdb Then I mounted it to /media/backups and put lots of files on it. I shut down the system, added another disk. Set it up with: # mkfs.btrfs /dev/sdc WARNING! - Btrfs Btrfs v0.19 IS EXPERIMENTAL WARNING! - see http://btrfs.wiki.kernel.org before using fs created label (null) on /dev/sdc nodesize 4096 leafsize 4096 sectorsize 4096 size 1.82TB Btrfs Btrfs v0.19 # btrfs device scan Scanning for Btrfs filesystems # (... Nothing? Not even my known mounted sdb drive?) # btrfs device add /dev/sdc /media/backups ERROR: error adding the device '/dev/sdc' It gives no clue as to what might possibly be the problem. I want raid0. Also I can not understand this: "Note: While subvolumes can be created anywhere in the filesystem tree, in order to be mounted by name a subvolume or snapshot must be in the root of the btrfs filesystem." I want to do this, but do not know what this means. Tentatively I've created a BTRFS volume and mounted it on /media/backups. I then created subvolumes as backup-hex, backup-droog, snaps-hex and snaps-droog. When I created a snapshot it created a subdir under snaps-hex called hex-root. It won't allow me to remove snapshots. (Debian Testing) Also does anyone know how to create a shapshot with the current date in the name? -- 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
