[CentOS] Repair grub GPT/UEFI?

[m.roth at 5-cent.us]

Les Mikesell wrote:
> On Thu, Jun 13, 2013 at 1:43 AM, Alexandru Chiscan
> <lec at chiscan.dnsalias.org> wrote:
>> On 06/13/2013 01:41 AM, Les Mikesell wrote:
>>> device (hd0) HD(1,800,64000,0557c1a7-7538-4ba1-b81e-74c4328b8b8d)
>> Just an ideea: check this line to see if
>> "0557c1a7-7538-4ba1-b81e-74c4328b8b8d" is not related to the boot disk.
>> you said you cloned it so probably you must put there the UUID of the
>> cloned disk.
>
> I gave up and restored a backup onto a host without the EFI boot
> partition and tweaked it to use the old-style grub invocation.   The
> machines seem to fail back to 'legacy' mode when there is no EFI/fat
> partition to boot from.  This gives a layout where rear and clonezilla
> 'just work'  and I'll know how to fix it if anything breaks.   Maybe
> I'll try again when rear supports UEFI (in the works) and I can look
> at their shell scripts to figure it out.

You might look at the firmware setup - our Dells let you choose UEFI or BIOS.

     mark