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

[Robert Heller]

At Tue, 29 May 2018 11:35:39 -0400 CentOS mailing list <centos at centos.org> wrote:

> 
> 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
> (/dev/sda).
> > 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).
> <snip>
> Y'know, what you just wrote above... that makes it sound like you need to
> go into the BIOS and reset the boot order.

Tried that.  Right now, the boot order lists all of the disks in *Legacy* boot 
mode.  

> 
>       mark
> 
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