[CentOS] Changing disk UUID after cloning

Wed May 22 20:12:21 UTC 2013
m.roth at 5-cent.us <m.roth at 5-cent.us>

Glenn Eychaner wrote:
> So, I have a CentOS 6 system, and I want to make several clones of it.
> I'm using Clonezilla to clone the drives; that's no problem.  But the
> drive UUIDs are driving me up the wall. After cloning, the two drives have
> the same UUID, but I'd like each clone to have different UUIDs so there's
> no possibility of a conflict when I am running diagnostics with two drives
> installed, etc. But when I change the UUID of the /boot or / partition
> (even if I update /etc/fstab), the system won't boot; it GRUBs OK (after I
> use recovery mode to rerun grub-install), but never gets to the 'Welcome
> to CentOS " message.  Do I need to "rebless" vmlinuz or initrd or
> initramfs in the /boot partition if I change the drive UUID?
> Or should I just ignore UUID and go back to using labels in /etc/fstab
> (which is what I did in CentOS 5)?

I hate UUIDs. There is *no* way you can remember them, when you're sitting
at a console trying to bring something up. We stayed with labels, which
always work, and are easy to change.