[Service]
# The overlayfs is not BTRFS and errors out, so the actual partition needs
# to be specified.
ExecStartPre=
ExecStartPre=-btrfs balance cancel /var
#ExecStartPre=-btrfs balance cancel /var/home
ExecStart=
ExecStart=btrfs balance start --full-balance /var
#ExecStart=btrfs balance start --full-balance /var/home