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)?