I have been using dd (
) to create backups of my ubuntu system. My computer has 2 internal drives and 1 external drive.
sudo dd if=/dev/drivetoduplicate of=/dev/backuplocation bs=1M
I used to find out that all three drives have the exact same UUID which is probably why no matter what is selected in the BIOs it boots to a random drive.
My hope is someone can give a beginner friendly step by step guide to changing the UUID for the drives in a way that allows them to be uniquely specified in the BIOS.
Also if anyone forsees any other issues I may run into or anything else I might change from the dd backup process please share.
I attempted to the change the UUID using
which worked and I was able to see that it had changed using blkid
sudo tune2fs -U random /dev/sdc1
sudo tune2fs -U random /dev/sdc5
and now when I select my external I'm unable to boot to it.