Why do you think it's a kernel problem? Are you trying to pass that device to a VM?
I'm not familiar with that device, but from the web site you linked, I wouldn't expect Unraid to support it natively. Unraid is not one of the supported platforms, according to that website. Unraid isn't a general purpose Linux installation and won't include drivers for that device. It doesn't even include wifi drivers.
You might try running Ubuntu in a VM and pass that device to it.