Hello,

I've tried building the bootimage with an extra ramdisk but so far only got instant reboot, so I decided to include it directly into the kernel.

Did you actually had success including a ramdisk with mkbootimg?

I think you need to specify an offset to the kernel, which declares the location of the image. Something like

but I had no time so far trying that out.

My first priority was to provide an fast solution to backup your device . Now I have some time and will look into it and include an ssh server for example.

Edit: Ramdisk inclusion with boot.img worked. I've no idea why it did'nt last time I tried. Perhaps because it was already very late and I'm tired So this is clearly the preferred method over init inclusion in kernel image.