Just wanted to share my experience as I was trying to virtualize Unraid using Proxmox.    TLDR: Try to find a motherboard which has a separate SATA controller not present on the same IOMMU group. If you face an issue where your Unraid USB stick is not bootable, migrate it to a new one. I already was running Unraid bare metal  on my low power "server". I wanted to upgrade my Unraid server to intel 10400 and then use Proxmox on it. I understand Unraid can also be