Allright, copying from one computer to another didn’t work, however I tried another approach… we have a disk duplicator from startech, so I plugged in the 80GB into the source and 2TB into destination and let it copy. It made an identical copy successfully, however the partition sizes where the same. So I used GParted to grow the sda1 to ~2TB. (with 3GB for swap) everything booted and is working fine.
I have now jumped from 98% usage down to 8% usage 🙂
Now the only issue this brings up is how to backup fog images if copying them somewhere and reviving them doesn’t work…