Context
•System was built in April 2020 with only the Samsung
Evo 970 M.2 drive installed (in M2_2 slot)
•System has been fully functional, running Windows 10
Pro, for 10 months
•Today (12 Feb 2021) I purchased and installed a new
WD Black SN750 M.2 in the M2_1 slot
•The BIOS does not detect the WD M.2 in the M2_1 slot
•Testing revealed that neither M.2 is detected by the
BIOS in the M2_1 slot
•The Windows 10 OS does not see the WD drive
installed in the M2_1 slot after boot