Boot | inetshell

FreeBSD: replace a disk in the ZFS boot mirror (zroot) with gpart

gpart backup ada0 | gpart restore -F ada3, BIOS bootcode on the freebsd-boot partition, loader.efi on the ESP, and zpool replace zroot ada3p4. Never the whole disk: you would lose the boot partitions.

Proxmox: error: disk 'lvmid/…' not found at grub rescue

Old GRUB cannot parse LVM metadata once it wraps around the buffer. From the ISO: lvcreate -L 4M pve -n grubtemp and reboot. Then grub-efi-amd64 or grub-install so it does not come back.