Re: Corrupted/broken EFI boot partition

Replying to myself in case anyone else is in the same situation.

Managed to repair the EFI partition by booting into the live
environment of the installer image, deleting the corrupted
EFI partition with

	gpart delete -i 1 da0

and then recreating it with

	gpart add -i 1 -a 4k -2 260M -t efi da0
	newfs_msdos -F 32 -c 1 /dev/da0p1
	mount -t msdosfs -o longnames /dev/da0p1 /mnt
	mkdir -p /mnt/efi/freebsd
	cp /boot/loader.efi /mnt/efi/freebsd/loader.efi
	efibootmgr --create --activate --label "FreeBSD" --loader \
              "/mnt/efi/freebsd/loader.efi"
	umount /mnt
	
(I then did the same for the other disks in the array just for
redundancy)

	Julf

On 12/12/2024 15:13, Johan Helsingius wrote:
> Hi,
> 
> I have a server with 4 disks with most of the disk as a 4-way ZFS
> root partition, and small EFI, freebsd-boot (as an emergency
> backup) and swap partition. For some reason the EFI partitions
> seem to have gotten corrupted in one of the updates, so the server
> simply refuses to boot using UEFI, and when trying to boot using
> BIOS booting, it complains about the efi partition being corrupted
> (and trying to mount it as a msdos partition results in failure
> as the partition is not valid.
> 
> What would be the easiest way to recreate the boot partitions
> without affecting the ZFS partitions)?
> 
> 	Julf
> 
>