-
Get a proxmox ISO mounted
-
boot to bios, switch to uefi, boot to ISO
-
head to
Install Proxmox (Debug Mode)
under advanced options -
press ctrl-d to launch a terminal
-
mount zfs, then chroot into it
zpool import -f -R /mnt rpool
mount -o rbind /proc /mnt/proc
mount -o rbind /sys /mnt/sys
mount -o rbind /dev /mnt/dev
mount -o rbind /run /mnt/run
chroot /mnt /bin/bash
- reformat second partition on every drive to uefi boot
proxmox-boot-tool format /dev/sda2
proxmox-boot-tool init /dev/sda2
...
exit
- boot back to bios, change boot order back to the drives