Robert Heller
2018-May-29 01:58 UTC
[CentOS] CentOS6: HELP! EFI boot fails after replacing disks...
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. > > That's interesting.?? Can you post the command and output where you see that? > > Also, post the output of "dmesg | grep efi:" and "ls /sys/firmware/efi/"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%> _______________________________________________ > CentOS mailing list > CentOS at centos.org > lists.centos.org/mailman/listinfo/centos > >-- Robert Heller -- 978-544-6933 Deepwoods Software -- Custom Software Services deepsoft.com -- Linux Administration Services heller at deepsoft.com -- Webhosting Services
Gordon Messmer
2018-May-29 03:54 UTC
[CentOS] CentOS6: HELP! EFI boot fails after replacing disks...
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. 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.
Robert Heller
2018-May-29 12:10 UTC
[CentOS] CentOS6: HELP! EFI boot fails after replacing disks...
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.> > _______________________________________________ > CentOS mailing list > CentOS at centos.org > lists.centos.org/mailman/listinfo/centos > >-- Robert Heller -- 978-544-6933 Deepwoods Software -- Custom Software Services deepsoft.com -- Linux Administration Services heller at deepsoft.com -- Webhosting Services
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