24.3. Updating Bootcode

Hello all,

With so much discussion about updating boot, I feel confused about the
correct procedure of doing it.

Like being said there are a "24.3. Updating Bootcode" in Handbook (WIP)
that points to some important manuals.

There are 3 places where boot loader are:

 ESP (EFI System Partition):
1 - (/boot/efi)/efi/boot/bootXXX.efi (default location)
2 - (/boot/efi)/efi/freebsd/loader.efi (FreeBSD reserved area)
Operating System:
3 - /boot/loader.efi

For what I've read we should:
 - backup: `cp /boot/efi/efi/boot/bootXXX.efi
/boot/efi/efi/boot/bootXXX.efi.bkp`
 - update: `cp /boot/loader.efi /boot/efi/efi/boot/bootXXX.efi`

In this example we have a /boot/efi mount by the system, "/dev/XXXpN on
/boot/efi (msdosfs, local)".

What about (/boot/efi)/efi/freebsd/loader.efi (reserved area)? Is necessary
to backup and update it too?

Thanks,

-- 
Nuno Teixeira
FreeBSD Committer (ports)