[SOLVED] Choose Systemd-boot over Grub on installation

[Andreas Piening]

I noticed that on some Servers we have Systemd-boot installed by the Proxmox installer while on other / older servers we have Grub running.
I would prefer Systemd-boot on my new installation with ZFS as the root filesystem because of issues with grub we had in the past with drive reordering etc.

I took a look at this wiki entry: https://pve.proxmox.com/wiki/Host_Bootloader

I'm still left with the question how I can make sure that Systemd-boot is used as the bootloader by the installer?
Does the installer ask me to choose?
If not: How can I verify that Systemd-boot would be used without having to do the full install and check afterwards?

 

[fabian]

if you boot the installer in UEFI mode and select ZFS as file system, you'll get systemd-boot with PVE 6.x

 

[Andreas Piening]

@fabian Thank you.
Do you know if there is a way to verify that the installer bootet in UEFI mode from within the installer?

 

[oguz]

Do you know if there is a way to verify that the installer bootet in UEFI mode from within the installer?

you can disable legacy boot and boot uefi-only.

or you can use the debug mode of the installer and check if /sys/firmware/efi/vars has any files

 

[Andreas Piening]

Thanks again,

looking at the boot process of the PVE installer, i noticed the following message:

EFI boot mode detected, mounting efivars filesystem

This was enough as a confirmation that the installer was booted in UEFI mode.

I then did the install with ZFS as the root filesystem and on the first reboot I was greeted by: Grub!

On another reboot with manual boot device selection, I was able to choose from a long list of boot devices. It looks like grub and Systemd-boot are both installed on the disks.
After modifying the boot order to boot from the UEFI devices first, Systemd-boot was booted and everything worked fine.

 

[fabian]

yes, we always install both so that a fallback is available (sadly, many systems had rather broken EFI setups in the beginning).

 

[juju01]

you can disable legacy boot and boot uefi-only

How? I'd like to do this. I am sure I setup my proxmox install with a zfs mirror in legacy boot mode. I had some errors trying to install it with a UEFI boot. So is there a way to first, check what I have and maybe, change the boot type to uefi ?