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#11
Hi,
That's to be expected. Imagine the following situation : two HDs each containing a Window 10 install for example and their respective SATA ports enabled.What I can't understand is that with CSM off and Secure Boot on there are "NO" device entries in UEFI boot list other than "Windows Boot Manager"!
These two should show in the bootable device list in bios with csm off and secure boot enabled.
CSM is a computability mode that allows you to boot from older non UEFI compliant hardware, MBR disks and so forth.
Note also that in order to run CSM, secure boot needs to be disabled. Most BOIS/UEFI require you to turn off Secure Boot first in order to access CSM mode.
Cheers,