Hi, I was just looking at btrfs property and what it can do. Now, I notice that the man page contains: label: label of device When I look at a device and ask what properties I can set, I see: -# btrfs property list -t device /dev/xvdb label Set/get label of device. But, when I try to set it, it complains: -# btrfs property set -t device /dev/xvdb label yolo ERROR: device /dev/xvdb is mounted, use mount point A mount point points to a whole filesystem, not a specific device. -# btrfs property set -t device /btrfs label yolo The result is that the label at filesystem level is set. A device doesn't even have something like a label itself. -# btrfs fi show Label: 'yolo' uuid: 370415b8-b96f-456e-8713-6833b2a65127 Total devices 4 FS bytes used 144.00KiB devid 1 size 10.00GiB used 1.00GiB path /dev/xvdb devid 2 size 10.00GiB used 1.00GiB path /dev/xvdc devid 3 size 10.00GiB used 288.00MiB path /dev/xvdd devid 4 size 10.00GiB used 288.00MiB path /dev/xvde So, am I missing something, or should this have been: -# btrfs property set -t filesystem label foo /mountpoint Hans
