sigh,.....no i did not say the device was disabled in device manager.
if it was, the entry would still say SAS/SCSI or LSI 2308 "disabled"
what i did say is that it's possible to disable the boot rom of the LSI 2308 chip from within the z820 bios
you have to understand and treat the LSI 2308 as a seperate entity that just happens to reside within the z820's bios
as such the LSI card's settings can be configured from the z820 bios, and there are several options that affect the card's booting such a the LSI boot options, or disabling the card entirely
please perform a CMOS reset