On Mon, Nov 25, 2024 at 17:37:28 -0500, e...@gmx.us wrote: > I'm not Thomas, but here you go. If you do > > dd if=/dev/sda1 of=/dev/sdb1 > > to copy sda1 to sdb1, they get the same UUID. Which makes one question the > Uniqueness part. I ran into that, and my solution was to use the actual > device names everywhere, something of the sdXY format. Which worked great > until I installed Debian, and something in the boot process makes the names > switch randomly.
Using "sda1" in fstab is a bad idea, for exactly the reasons you discovered the hard way. The names will not necessarily be assigned to the same devices each time you boot. Given that you dd-copied a file system, you might consider changing the UUID of the new copy. Assuming this is an ext4 file system, tune2fs(8) has a -U option that looks like it should do the job. Specifically, "-U random" looks promising, though I haven't tested it. If it's not ext4, then consult your documentation for whichever type of file system this is.
