Resource Mapping allows VMs with hardware passthrough (like GPUs or USBs) to migrate between servers seamlessly. By replacing fixed hardware addresses with a centralized alias. example: You have a 3-node Proxmox cluster (Node-A, Node-B, and Node-C). - Each server has a dedicated Nvidia GPU installed for Plex transcoding. - However, because the motherboards are different, the physical PCI IDs of the GPUs do not match: - Node-A: GPU is at 0000:01:00.0 - Node-B: GPU is at 0000:02:00.0 - Node-C: GPU is at 0000:08:00.0 solution: , instead of selecting a raw PCI ID, you simply select the resource named Plex-Nvidia-GPU