! printf '%s\n' "$${VOLUME}" |grep -q '^/dev/' # abort if volume should be real device
dd count=0 of="$${VOLUME}" # truncate
dd bs=1M count=0 seek=$$((3 + ${BOOT_MB} + ${ROOT_MB})) of="$${VOLUME}"
! printf '%s\n' "$${VOLUME}" |grep -q '^/dev/' # abort if volume should be real device
dd count=0 of="$${VOLUME}" # truncate
dd bs=1M count=0 seek=$$((3 + ${BOOT_MB} + ${ROOT_MB})) of="$${VOLUME}"