proxmox-boot-tool: convert systemd to legacy boot?

[Dunuin]

Hi,

I needed to replace the hardware of a cluster node. The old node was using proxmox-boot-tool (systemd boot, no secure boot) and ZFS for the root filesystem. The "new" hardware only supports legacy boot. I would prefer to reuse the old disks without reinstalling PVE. Did someone already tried this and could explain how to do this or do I need to do a fresh installation using proxmox-boot-tool (grub) and add it as a new cluster node?

 

[_gabriel]

i should convert gpt disk to mbr using gdisk.
EFI Boot partition will become a standard FAT32 part, need boot flag. then install grub bootloader with proxmox-boot-tool, it can format then init /dev/sXn grub
https://pve.proxmox.com/wiki/Host_Bootloader
kernel will be copied to small FAT32, which allow ZFS boot.

(from my phone)