Right now when users migrate the VMs with Raw Copy Mode the VM will always have compatibility mode bus (SATA, E1000E, USB) even if the VM already has the virtio drivers installed before migration. MTV should add an option to use the virtio drivers with Raw Copy mode. 

The plan will have new option `useCompatibilityMode` that controls whether to use VirtIO devices when skipGuestConversion is true (Raw Copy mode).
This setting has no effect when skipGuestConversion is false (V2V Conversion always uses VirtIO).

• true (default): Use compatibility devices (SATA bus, E1000E NIC) to ensure bootability
• false: Use high-performance VirtIO devices (requires VirtIO drivers already installed in source VM)

So as this new plan setting depends on Raw Copy Mode I would have this option in the Raw Copy Mode settings. If customer would set it to true we could show another toggle to specify the  useCompatibilityMode which by default is true and customer could disable it.