Re: EdgeRouter X/X-SFP check bootloader version

  That's correct, the units that ship with the updated bootloader from the factory show: 

828a6788a539809103bd42d121634211  /dev/mtdblock2

I have updated the bootloader blog post with more details to include this information.

In the future, rather than using the old script to update the bootloader, we will release a new bootloader version for devices and you will be able to use:

add system boot-image ...

Then using show system boot-image will show the active bootloader version rather than "UNKNOWN".