remove older backups

rm /mnt/sdcard/data.tar /mnt/sdcard/system.tar /mnt/sdcard/dbdata.tar


Backup

mount /dev/block/mmcblk0p1 /sdcard;mount /dev/block/mmcblk0p2 /data;mount /dev/block/stl9 /system;mount /dev/block/stl10 /dbdata;rm /sdcard/data.tar /sdcard/system.tar /sdcard/dbdata.tar;cd / && tar cvf /sdcard/system.tar /system && tar cvf /sdcard/data.tar /data && tar cvf /sdcard/dbdata.tar /dbdata


Make a factory reset before restoring in recovery.

Restore
mount /dev/block/mmcblk0p1 /sdcard; mount /dev/block/mmcblk0p2 /data; mount /dev/block/stl9 /system; mount /dev/block/stl10 /dbdata; mount /dev/block/stl11 /cache; cd / && rm -rf /system/* /data/* /dbdata/* /cache/* && tar xvf /sdcard/system.tar && tar xvf /sdcard/data.tar && tar xvf /sdcard/dbdata.tar