grub2-install: error: efibootmgr failed to register the boot entry

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Environment

SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server 12

Situation

While installing SLES 15 SP3 on PERC VD with secure boot option disabled in the installer, the below error was observed causing the installation to fail:

Execution of command "[["/usr/sbin/grub2-install","--target-x86_64-efi","--force","--skip-fs-probe"]]" failed.
Exit code: 1
Error output: Installing for x86_64-efi platform.
Could not prepare Boot variable: Function not implemented
/usr/sbin/grub2-install: error: efibootmgr failed to register the boot entry: Input/output error.

Resolution

For UEFI boot, the EFI system partition must be located on a primary partition formatted with a FAT filesystem, and contained on a MBR or GPT labeled drive.
Further details can be found in the UEFI specifications (section 13.3) located at uefi.org.
The current version of the UEFI specifications PDF (at time of writing the article) is available at: https://uefi.org/sites/default/files/resources/UEFI_Spec_2_8_final.pdf

Cause

Reason for the failure mentioned above was an attempt to install where the EFI system partition, /boot/efi, was located on a logical partition (/dev/sda5). This violates the UEFI specification.

Disclaimer

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