详细，实际很用心的命令分享
不用u盘
dd if=/dev/block/mmcblk0p1 of=/mnt/sdcard/Download/fastboot.img
dd if=/dev/block/mmcblk0p2 of=/mnt/sdcard/Download/bootargs.img
dd if=/dev/block/mmcblk0p3 of=/mnt/sdcard/Download/recovery.img
dd if=/dev/block/mmcblk0p4 of=/mnt/sdcard/Download/deviceinfo.img
dd if=/dev/block/mmcblk0p5 of=/mnt/sdcard/Download/baseparam.img
dd if=/dev/block/mmcblk0p6 of=/mnt/sdcard/Download/pqparam.img
dd if=/dev/block/mmcblk0p7 of=/mnt/sdcard/Download/logo.img
dd if=/dev/block/mmcblk0p8 of=/mnt/sdcard/Download/fastplay.img
dd if=/dev/block/mmcblk0p9 of=/mnt/sdcard/Download/kernel.img
dd if=/dev/block/mmcblk0p10 of=/mnt/sdcard/Download/misc.img
dd if=/dev/block/mmcblk0p11 of=/mnt/sdcard/Download/trustedcore.img
dd if=/dev/block/mmcblk0p12 of=/mnt/sdcard/Download/backup.img
dd if=/dev/block/mmcblk0p13 of=/mnt/sdcard/Download/system.img
dd if=/dev/block/mmcblk0p14 of=/mnt/sdcard/Download/cache.img
dd if=/dev/block/mmcblk0p15 of=/mnt/sdcard/Download/private.img
dd if=/dev/block/mmcblk0p16 of=/mnt/sdcard/Download/securestore.img
dd if=/dev/block/mmcblk0p17 of=/mnt/sdcard/Download/userdata.img