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

[Robert Heller]

At Mon, 28 May 2018 20:54:32 -0700 CentOS mailing list <centos at centos.org> wrote:

> 
> On 05/28/2018 06:58 PM, Robert Heller wrote:
> > At Mon, 28 May 2018 18:23:42 -0700 CentOS mailing list <centos at centos.org> wrote:
> >> On 05/28/2018 03:25 PM, Robert Heller wrote:
> >>> I tried to run efibootmgr, but it wants a model named efivars loaded, but
> >>> there is no such module available.
> > newserver.wendellfreelibrary.org% sudo efibootmgr
> > [sudo] password for heller:
> > Fatal: Couldn't open either sysfs or procfs directories for accessing EFI variables.
> > Try 'modprobe efivars' as root.
> > newserver.wendellfreelibrary.org% sudo  modprobe efivars
> > FATAL: Module efivars not found.
> > newserver.wendellfreelibrary.org% dmesg | grep efi:
> > newserver.wendellfreelibrary.org% ls /sys/firmware/efi/
> > ls: cannot access /sys/firmware/efi/: No such file or directory
> > newserver.wendellfreelibrary.org% uname -a
> > Linux newserver.wendellfreelibrary.org 2.6.32-696.28.1.el6.x86_64 #1 SMP Wed
> > May 9 23:09:02 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
> > newserver.wendellfreelibrary.org%
> 
> Look into the possibility that you're booting via BIOS and not UEFI.

No, it was booting from UEFI.

> 
> It's possible to have /boot and /boot/efi, and also to have GRUB2 
> installed on the disk, in which case the system is able to boot from 
> both BIOS and UEFI.
> 
> If that's the case, then you'd need to install GRUB2 on the new disk as 
> well.

I don't believe grub2 is available for CentOS *6*.  At least I don't see a RPM 
for it.

> 
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>                                                                              

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