Question Booting legacy ROM on an MSI B450 Tomahawk

[imrazor]

I have an old RAID card (Dell SAS 6/iR) that is recognized as a dumb controller card by the system. In order to get RAID functionality, I believe I have to boot in 'legacy' mode. There are options for booting a drive and the onboard NIC in Legacy mode, but not PCIe option ROMs. Am I overlooking a setting somewhere?

 

[imrazor]

Did some more research on this and apparently I needed to enable CSM in the BIOS. Unfortunately MSI obscures with an option to enable/disable "WHQL" instead. Once WHQL compliance was disabled, I was able to create a RAID array and boot off it.