I would look at the UEFI vs BIOS boot options in the "backup" server and compare it to the "broken" server and make sure they are the same. Also check for BIOS updates and such.
-Erik-
Hi,
I turned on my main home server after a few weeks absence, and got
smoke from its power supply. Fortunately, I have a backup system, which
does work; both are running Debian 10, so I swapped use to that machine.
and am able to work with that, but some of the files and settings are a
bit out of date.
I decided to move the disk from the broken machine to the backup, but on
booting I'm dropped into a grub screen saying disk id <blablabla> not
found. Not entirely surprising perhaps.
So, how do I get it to recognize, and boot from the old disK.
Cheers, Tony