umount /system
umount /data
umount /sdcard
umount /cache

parted /dev/block/mmcblk0 <<EOF
rm 21
rm 22
rm 23
mkpart primary 159383552B 1732247551B
name 21 system
mkpart primary 1732247552B 1994391551B
name 22 vendor
mkpart primary 1994391552B 2099249151B
name 23 cache
mkpart primary 2099249152B 15756951551B
name 26 userdata
quit
EOF

make_ext4fs /dev/block/mmcblk0p21
make_ext4fs /dev/block/mmcblk0p22
make_ext4fs /dev/block/mmcblk0p23
make_ext4fs /dev/block/mmcblk0p26

ln -sf /dev/block/mmcblk0p21 system
ln -sf /dev/block/mmcblk0p22 vendor
ln -sf /dev/block/mmcblk0p23 cache
ln -sf /dev/block/mmcblk0p26 userdata

rm /sbin/parted
reboot recovery