cannot open root device

--- Quote End ---

Hello,

I had the same problem. I fixed it by specifying the path to the boot image. For some reason it was poininting to something else. When one starts specifying the Kernel options, one of the entries idicates where that image is. I don't have the machine next to me, so I can not tell you where exactly it is. Sorry.

--- Quote End ---

Hello .

thank for help !

You fixed it by specifying the path to the boot Image . you mean is modify "Default kernel command string"

and How about your romfs dir . the most subdir in my romfs dir is empty except romfs/etc and romf/home .

thanks .