[RappaSan]

The mode from page 1, " Migrating LibreELEC from RPi1 to RPi2, and back again "
didn't work for me.
I've sent the .tar file to the Pi2 update folder, shut down and put the SD card in the Pi1 - nothing happens.
Sending the .tar file to the Pi2 update folder, reboot the pi2 - message after unpacking and md5 checks: Error ... is not compatible with RPI2 arm hardware.

After that the P2 system is restarting as before.

What went wrong?

Ah yes, the compatibility check was added to LibreELEC after I wrote those instructions.

When you intentionally want to upgrade an RPi2 with the RPi1 tar file, you'll need to create the "nocompat" flag file - this will require ssh:

Code:

touch /storage/.update/.nocompat

then copy the RPi1 tar file into the Update (or .update) folder on the RPi2, and then reboot.

The RPi2 will upgrade to the RPi1 firmware, and when it reboots after the upgrade you should see the "rainbow splash" (as you are now booting the RPi2 with RPi1 firmware). I'll update the note in the first post, thanks. 

Just wanna say
Thanks a lot.