@bobtrex So the story goes: These drives need the extra SUSCLK clock signal to function. If it’s not present, you see nothing and the drive sulks. Except sometimes they work. Maybe. Maybe not. Given how many drives work really well and cost relatively little, and the reported problems with the WD drives, we just recommend avoiding them until the mists of uncertainty clear. Given the extra clock is unnecessary and not provided on the PCIe connector, we’re loathe to make the product more expensive to support a specific niche of drives.
I’d be interesting in the issues you’re seeing on the drives that show up, as that may be something we do have a solution for :-)