reinstalling GRUB / UEFI Entrys

[Gamienator]

Heyho there,
I had an issue with my proxmox install and had to replace one of my ZFS disks.

Using Proxmox VE 6.3 with 2 SSDs in an ZFS mirror. After switching the main disk, I resilvered the partition 3 and made a

dd if=/dev/disk/by-id/heatly-disk-part2 of=/dev/disk/by-id/new-disk-part2 bs=512

But still, after trying to boot from the second disk entry its not working. Does anybody have an Idea how to rebuild Grub and reinstall the EFI entrys?

Thanks in advance for the help!

Cheers,
Gamie

 

[Dunuin]

Did you see the Guide in the Wiki?

Changing a failed bootable device​

Depending on how Proxmox VE was installed it is either using grub or systemd-boot as bootloader (see Host Bootloader).
The first steps of copying the partition table, reissuing GUIDs and replacing the ZFS partition are the same. To make the system bootable from the new disk, different steps are needed which depend on the bootloader in use.
# sgdisk <healthy bootable device> -R <new device>
# sgdisk -G <new device>
# zpool replace -f <pool> <old zfs partition> <new zfs partition>

Use the zpool status -v command to monitor how far the resilvering process of the new disk has progressed.

With systemd-boot:
# pve-efiboot-tool format <new disk's ESP>
# pve-efiboot-tool init <new disk's ESP>

ESP stands for EFI System Partition, which is setup as partition #2 on bootable disks setup by the Proxmox VE installer since version 5.4. For details, see Setting up a new partition for use as synced ESP.

With grub:
# grub-install <new disk>

 

[Gamienator]

Thanks! Didn't know of that entry. Was able to fix it