- mount -o loop,offset="$$((${BOOT_MB} + 2))"M,sizelimit=${ROOT_MB}M \
- -t ext4 "$${VOLUME}" "$${CFGROOT}"
+ mountpoint "$${CFGROOT}" \
+ || mount -o loop,offset="$$((${BOOT_MB} + 2))"M,sizelimit=${ROOT_MB}M \
+ -t ${fstype} "$${VOLUME}" "$${CFGROOT}"