echo -e "resizepart\nYes\nquit" | parted /dev/vda ---pretend-input-tty

echo -e "mkpart primary ext4 -4GiB 100%\nI\nquit" | parted -a optimal /dev/$di ---pretend-input-tty

parted -a optimal /dev/$di "mkpart primary ext4 -4GiB 100%"