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)?
Thanks, -G. -- Glenn Eychaner (geychaner@lco.cl) Telescope Systems Programmer, Las Campanas Observatory
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
*If the disk is in /dev/sda2 then generate a new UUID with uuidgen and apply it with tune2fs
myhost # uuidgen b13fddae-a3c3-4d17-8220-7773eb404dec myhost # tune2fs -U b13fddae-a3c3-4d17-8220-7773eb404dec /dev/sda2
Mike
* On 05/22/2013 04:12 PM, m.roth@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
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
something like this:
http://ubuntuforums.org/showthread.php?t=1378527
2013/5/22 Glenn Eychaner geychaner@mac.com
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)?
Thanks,
-G.
Glenn Eychaner (geychaner@lco.cl) Telescope Systems Programmer, Las Campanas Observatory
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
On Wed, 22 May 2013, 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?
tunee2fs or reisrfstune can probably do what you want.
Or should I just ignore UUID and go back to using labels in /etc/fstab (which is what I did in CentOS 5)?
I'd use labels and I'd make them systematic labels, e.g. disklabel-partitionlabel. This is likely to start another religious flame war.
-
Eero Volotinen -
Glenn Eychaner -
m.roth＠5-cent.us -
Michael Hennebry -
Mike McCarthy