[CentOS] CentOS6: HELP! EFI boot fails after replacing disks...

Tue May 29 15:35:39 UTC 2018
m.roth at 5-cent.us <m.roth at 5-cent.us>

Robert Heller wrote:
> At Tue, 29 May 2018 06:47:06 -0700 CentOS mailing list <centos at centos.org>
> wrote:
>> On 05/29/2018 06:33 AM, Robert Heller wrote:
>> >
>> >> The UUID in the EFI boot options is
>> >> 99E275E7-75A0-4B37-A2E6-C5385E600CB, which
>> >> does not to match anything, but the system is only happy booting the
>> >> old disk...
>> > And at this point, it will only boot in legacy mode off the old disk.
>> That's what I meant, I think.'?'? Legacy mode is BIOS-compatible.'?'? If
>> you're booting in legacy mode, you can't access the UEFI variables. The
>> old disk probably has GRUB installed on the first block.'?'? It might be
>> booting in legacy mode *because* the UEFI boot option's UUID doesn't
>> match your partition.
> OK,  I think at this point it is not wanting to even boot the old disk in
> EFI mode.  Maybe because the old disk is no longer in SATA port 0
> It is not wanting to boot the new disk in EFI mode and won't boot from the
> Optical disk in EFI mode (at least I cannot figure out how to do that).
Y'know, what you just wrote above... that makes it sound like you need to
go into the BIOS and reset the boot order.