[CentOS] Changing disk UUID after cloning

Wed May 22 20:19:42 UTC 2013
Mike McCarthy <sysop at w1nr.net>

*If the disk is in /dev/sda2 then generate a new UUID with uuidgen and
apply it with tune2fs

myhost # uuidgen
myhost # tune2fs -U b13fddae-a3c3-4d17-8220-7773eb404dec /dev/sda2


On 05/22/2013 04:12 PM, m.roth at 5-cent.us wrote:
> 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.
>       mark
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