I think this has been a motherboard problem instead of an unraid problem:
MSI Tomahawk z790.
Issues in my original post were happening while trying my backup USB in UEFI mode and a new USB w/ copied config in UEFI mode.
Re-imaged my original backup into it's original legacy boot, and got into unraid after setting motherboard to CSM and Legacy boot.
While in legacy mode, i get no video during boot from motherboard until unraid's login text starts scrolling, got into WEB Gui, no SAS drives.
Reset CMOS, got back into bios, it sees the SAS card, I set it back to Legacy boot, boot from USB, etc. Still get no video during post, but Unraid is back up and all my drives are visible and correctly assigned.
