I have centos 6.4 64. In /boot/efi/EFI/redhat I have grub.efi file (about 251Kb). However, when I execute efibootmgr I get

Fatal: Couldn't open either sysfs or procfs directories for accessing EFI variables. Try 'modprobe efivars' as root.

My question what do I use - BIOS or UEFI?

1 Answer 1


This page suggests you need BIOS or a more recent version of CentOS 6: http://wiki.centos.org/HowTos/UEFI.

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