1802 Bios has missing m.2 settings and what is SATA 7 and Sata 8, there is only 6 Black Sata connectors on the board
What board do you have. I have the Maximus XI Extreme and there were no m.2 settings ever. There was only one setting on the Boot tab that allow turning on the native NVMe driver.
After I updated to 1802 my SATA HDD's are disappeared. Bios and Windows. They don't turning up at all... Today I checked all the things around my HDD's... Other cables, other ports, other power-supply, other HDD's... Nothing is working ... tested with old Samsung 1TB (running nice before) and a 8TB Western Digital. The SATA Blu-Ray is recognized and running fine.
Asus ROG Maximus XI Hero WiFi
Have you tried 1903 BIOS?