I did some VM gpu passthrough testings on Pop os (Ubuntu/Debian flavor), and managed to mess it up, and did a restore from Acronis backup.
It didn't work so well - booting ended in emergency mode. I had to search on the net for instructions of how to look for what might have caused such a failure.
In emergency mode one can use commands, so I used 'journalctl -xb', which prints, I guess, a log of what happens during booting. There was a message like 'timed out waiting for device /dev/disk/by-partuuid/<device id>'. After looking for more info, I found out that it may have to do with device/drive uuid mismatch.
I tried several "how to's" to fix the problem, but none of them seemed to work. Part of the fun is to write down disk id's on a paper, as there apparently isn't easy ways to copy and paste them to a text file in emergency mode..
Using Pop os live (from usb stick), there is an option 'refresh install' to restore the system using recovery partition, but it didn't work either, indicating that the device isn't valid/recognized.
It really gets overly technical in situation like this, so I just wiped whole disk, and made a new installation.
So, what backup methods to consider to avoid such problems?
