Support full preallocation (writing zeroes)

else

  MB=$(( (SYSTEM_SIZE + 1048575)/1048576 ))

  echo "INFO: Writing ${MB} MB of zeroes, please wait.."

  echo "INFO: Writing ${MB} MB of zeroes.."

  dd if=/dev/zero of="${SYSTEM}" count="${MB}" bs=1M

  truncate -s "${SYSTEM_SIZE}" "${SYSTEM}"

fi

# Check if file exists

if [ ! -f "${SYSTEM}" ]; then

    echo "ERROR: System disk does not exist ($SYSTEM)" && exit 89

fi

# Check the filesize

SIZE=$(stat -c%s "${SYSTEM}")

if [[ SIZE -ne SYSTEM_SIZE ]]; then

  echo "ERROR: System disk has the wrong size." && exit 89

  rm -f "${SYSTEM}"

  echo "ERROR: System disk has the wrong size: ${SIZE}" && exit 90

fi

PART="$TMP/partition.fdisk"