On 18.04.20 01:06, Nix wrote:
Rather than trying to make some sort of clever mirroring setup work with
the ESP, I just made one partition per disk, added all of them to the
efibootmgr:
Boot000B* Current kernel HD(1,GPT,b6697409-a6ec-470d-994c-0d4828d08861,0x800,0x200000)/File(\efi\nix\current.efi)
Boot000E* Current kernel (secondary disk) HD(1,GPT,9f5912c7-46e7-45bf-a49d-969250f0a388,0x800,0x200000)/File(\efi\nix\current.efi)
Boot0011* Current kernel (tertiary disk) HD(1,GPT,8a5cf352-2e92-43ac-bb23-b0d9f27109e9,0x800,0x200000)/File(\efi\nix\current.efi)
Boot0012* Current kernel (quaternary disk) HD(1,GPT,83ec2441-79e9-4f3c-86ec-378545f776c6,0x800,0x200000)/File(\efi\nix\current.efi)
... and used simple rsync at kernel install time to keep them in sync
(the variables in here are specific to my autobuilder, but the general
idea should be clear enough):
# For EFI, we install the kernel by hand. /boot may be a mountpoint,
# kept unmounted in normal operation.
mountpoint -q /boot && mount /boot
KERNELVER="$(file $BUILDMAKEPATH/.o/arch/x86/boot/bzImage | sed 's,^.*version \([0-9\.]*\).*$,\1,g')"
install -o root -g root $BUILDMAKEPATH/.o/System.map /boot/System.map-$KERNELVER
install -o root -g root $BUILDMAKEPATH/.o/arch/x86/boot/bzImage /boot/efi/nix/vmlinux-$KERNELVER.efi
[[ -f /boot/efi/nix/current.efi ]] && mv /boot/efi/nix/current.efi /boot/efi/nix/old.efi
install -o root -g root $BUILDMAKEPATH/.o/arch/x86/boot/bzImage /boot/efi/nix/current.efi
for backup in 1 2 3; do
test -d/boot/backups/$backup || continue
mount/boot/backups/$backup
rsync -rtq --modify-window=2 --one-file-system/boot/ /boot/backups/$backup
umount/boot/backups/$backup
done
mountpoint -q /boot && umount /boot
Is there any reason why one could not have another entry for each disk
(8 entries in this example in total instead of the 4 being listed) like:
Boot000B* Current kernel
HD(1,GPT,b6697409-a6ec-470d-994c-0d4828d08861,0x800,0x200000)/File(\efi\nix\old.efi)
and so on to support booting the old kernel in case something went wrong?
