SOLVED: After days of chasing this, I finally made a breakthrough using Clover in a short time. The Supermicro X9 is very picky, and previous attempts at using Clover were unsuccessful. In this implementation, the system boots from an M.2 SATA drive not a USB. It uses Clover to load the NVMe drivers and boot the Windows OS stored on the NVMe. The system is very responsive, and all of this happens invisibly.
I used this optional card to install an M.2 SATA drive and an NVMe drive in the same PCIe card. The M.2 SATA drive is connected to the motherboard via a SATA cable. It boots like any other SATA device. The NVMe drive is the only thing attached to the PCIe. It's like making any NVMe drive bootable on almost anything.
Copilot and I created a CMD script and a USB image that will update the SATA to install the Clover components and enable the capability. I'll post the script and files soon. The USB is only used to do the install. Unlike other Clover impementation no USB is needed beyond the install. I like this card because it keeps the boot device and NVMe drive as a package. It is not necessary as long as the SATA drive stays in the system; it can be any SATA drive. The SATA drive can be used as a data drive.
USB should contain files from CloverV2-5169 repository:
nvme.cmd (attached)
EFI\CLOVER\
EFI\CLOVER\CLOVERX64.efi
EFI\CLOVER\config.plist (attached)
EFI\CLOVER\Drivers\UEFI\NvmExpressDxe.efi
EFI\CLOVER\Drivers\UEFI\VBoxHfs.efi
EFI\Boot\bootx64.efi
README.txt (attached)
rename plist and cmd to eliminate the "txt" extension
I previously posted my quest in an 2018 thread. I decided best to start a new one.
Here is the old one.
Old thread
I deleted the scripts I had here because I had some issues reproducing. I will repost when I get the script to reproduce reliably. If you are interested, please reply to the post.
.
I used this optional card to install an M.2 SATA drive and an NVMe drive in the same PCIe card. The M.2 SATA drive is connected to the motherboard via a SATA cable. It boots like any other SATA device. The NVMe drive is the only thing attached to the PCIe. It's like making any NVMe drive bootable on almost anything.
Copilot and I created a CMD script and a USB image that will update the SATA to install the Clover components and enable the capability. I'll post the script and files soon. The USB is only used to do the install. Unlike other Clover impementation no USB is needed beyond the install. I like this card because it keeps the boot device and NVMe drive as a package. It is not necessary as long as the SATA drive stays in the system; it can be any SATA drive. The SATA drive can be used as a data drive.
USB should contain files from CloverV2-5169 repository:
nvme.cmd (attached)
EFI\CLOVER\
EFI\CLOVER\CLOVERX64.efi
EFI\CLOVER\config.plist (attached)
EFI\CLOVER\Drivers\UEFI\NvmExpressDxe.efi
EFI\CLOVER\Drivers\UEFI\VBoxHfs.efi
EFI\Boot\bootx64.efi
README.txt (attached)
rename plist and cmd to eliminate the "txt" extension

I previously posted my quest in an 2018 thread. I decided best to start a new one.
Here is the old one.
Old thread
I deleted the scripts I had here because I had some issues reproducing. I will repost when I get the script to reproduce reliably. If you are interested, please reply to the post.
.
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