### end getting root_dir
cd $root_dir
- if [[ -e $vol && $vol != qd ]]; then
+ if [[ -e $vol ]]; then
+ if [[ $vol == qd ]]; then
+ m btrfs sub del qd
+ fi
leaf=$vol.leaf.$(date +%Y-%m-%dT%H:%M:%S%z)
m mv $vol $leaf
m btrfs property set -ts $leaf ro true