There is a good description here, how to get a permanent ssh after firmware upgrade:
However I also stuck, with write back step.
root@XiaoQiang:~# mtd write /tmp/bdata_mtd9.img bdata Could not open mtd device: bdata Can't open device for writing!
There is anyone figured out how to solve it?
The crash_unlock.img is written sucessfuljy, at least seems to it.
root@XiaoQiang:~# mtd write /tmp/crash_unlock.img crash Unlocking crash ... Writing from /tmp/crash_unlock.img to crash ... root@XiaoQiang:~#