So initially I wanted a stand alone windows on one of the blades of the 7101A. I thought I was going to be able to do it using the 9 to 5 Mac method here. Everything was going great until I got to the 8:56 part - it can't recognise the 7101A as a USB - so it can't go any further.Are you trying to install Windows on the drive directly and have VMware run from that drive while in MacOS? For that you would need to enable passthru for the whole card so I don't think what you are trying to do will work. Your best bet would be to format the card that you want to use for your windows VM and then put your virtual machine's files on the card. If you are trying to do a dual boot to install windows then you will need to head into recovery mode and disable secure boot to be able to install windows to the blade on the card properly.
I can help with either, just need a little clarification on your goal and use case.
I wrote to Highpoint and tech got back to me with the attached .pdf explaining it can't be done.
So I think I am just going to do what I think you are suggesting in the second part of your reply - Use VMware, but rather than have all the Windows files on the Apple SSD, when VMware asks me where do I want to down load the files to, I guess I will select the 7101A single blade.
VMware app on in the normal applications folder, and it will access all the windows stuff on the 7101A blade. I think.