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Discussion Starter #1
Hi all,

Not sure if this really belongs here, so I apologize in advance. Admin, remove this post if it's the case.

I was told that I should disable CSM in BIOS for latest Windows versions.
Ever since doing so, I keep getting a warning message when I go to BIOS settings.

What should be the correct settings for UEFI?



Appreciate any help
 

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1. Update the Marvel Sata firmware with UEFI driver if possible.
2. If your not using the Marvel Sata for booting, just storage then can ignore the message. Windows will load it's own driver.
3. If your not using the Marvel Sata ports at all then disable the Marvel device in the BIOS
 

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Vendor ID 1B4B, Device ID 9130
https://pci-ids.ucw.cz/read/PC/1b4b/9130

An Option ROM is used to access the storage at the BIOS phase. Once Windows takes over it uses it's own drivers. Two types of Option ROM, legacy and UEFI Driver. Your firmware probably only has legacy which with a UEFI BIOS requires CSM support. In that case with full UEFI (no CSM) the BIOS will not be able to access storage devices on that particular device which isn't a problem if it's not needed for the BIOS or booting the OS.
 
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