the big issue I found is that there's no option anywhere for CSM. I believe it should be there according to the spec, but neither the v1.00 or v1.30 firmware shows it.
Probably merits discussion in another thread, but from a quick shufti through the J4105 manual there's no sign of a CSM being available on this board, whereas its predecessor has it listed at the bottom of the boot screen. Lots of these "Win 10 compliant" boards are dropping the CSM these days (indeed, I was very disappointed that my Supermicro C3000 doesn't have a CSM either as that too makes booting a pain [linux mdadm software RAID in my case]). Possibly this is a limitation imposed from the top down, as intel says they want BIOS dead by 2020.
Which RAID card are you using that doesn't show as a UEFI boot entry though, I assume an old one? I don't use them at home but I don't think I've seen a RAID/HBA card at work in at least the last 5yrs that didn't present itself as a UEFI boot entry. I've seen some BIOSes (example pic
here) with switches to force a UEFI ROM before a regular BIOS option ROM but again that doesn't look to be available on the J4105.