I have a 990 Pro and a 980 Pro installed.  The OS (Win 11) is running on the 990 Pro.  Both drives perform very well.  That said, Samsung Magician had no problem updating the 980 Pro but will not update the 990 Pro.  I have tried everything I can think of including booting into the Linux (ISO on USB drive) environment - that approach says no valid drives found for updating.

I have moved the 990 to a different slot - that is, I swapped the 980 and 990 locations with each other, I have disabled TPM and set the boot to Other OS and disabled Secure Boot.  I cannot think of anything else to try.  Looking for ideas please!