Unable to boot after a system board change on UEFI systems
Issue
- We replaced the system board on the machine with UEFI enabled. After that, we had a boot problem on the system.
- We noticed that we need to reload the RHEL grub.efi bootloader into the UEFI boot manager config.
- We tried the following commands. But, We are not sure if it's correct and what anaconda does for it.
- Remove any existing entry in hex location 0018. Seems to be where RHEL is setting itself up in anaconda.
# efibootmgr -B -b '18'
- Configure the UEFI boot manager NVRAM to point to the grub efi bootloader
# efibootmgr --label 'Red Hat Enterprise Linux' --bootnum '18' --loader '\EFI\redhat\grub.efi' --disk /dev/sda --part 1 -c
Environment
- Red Hat Enterprise Linux 6
- Anaconda
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