mv @root/ext2_saved/ @ext2_saved
mkdir @root/btrfs
btrfs subv create @apt; mv @root/var/cache/apt/archives/* @apt/
+btrfs subv create @varlog
btrfs subv create @vartmp; chmod 1777 @vartmp ; chmod 0755 @root/var/tmp
btrfs subv set-default @root
LABEL=RASPIROOT / btrfs subvol=@root,discard,compress,nodev 2 0
LABEL=RASPIROOT /btrfs btrfs subvol=/,discard,compress,nodev,nosuid 0 0
LABEL=RASPIROOT /var/cache/apt/archives btrfs subvol=@apt,discard,compress,nodev,nosuid 0 0
+LABEL=RASPIROOT /var/log btrfs subvol=@varlog,discard,compress,nodev,nosuid 0 0
LABEL=RASPIROOT /var/tmp btrfs subvol=@vartmp,discard,compress,nodev,nosuid 0 0
LABEL=RASPIFIRM /boot/firmware vfat discard,nodev,nosuid,noexec 1 0
EOT