[intronauta]

Comandos disponibles para hacer backup/restore desde adb:

Método 1:

BACKUP:
#mount /sdcard
#mount /system
#mount /data
#cd
#tar cpf /sdcard/data.tar /data
#tar cpf /sdcard/sys.tar /system

RESTORE:
#mount /sdcard
#mount /system
#mount /data
#cd
#tar xpf /sdcard/data.tar
#tar xpf /sdcard/sys.tar

Método 2:

BACKUP:
#mount /sdcard
#cat /dev/mtd/mtd3 > /sdcard/system.img
#cat /dev/mtd/mtd5 > /sdcard/user.img

RESTORE:
#mount /sdcard
#cat /dev/zero > /dev/mtd/mtd3
#cat /sdcard/system.img > /dev/mtd/mtd3
#cat /dev/zero > /dev/mtd/mtd5
#cat /sdcard/data.img > /dev/mtd/mtd5