For information, Intel Rapid Storage Technology in your BIOS = RAID mode (this has always been the case, even before Intel 6xx series chipsets).
Except that since Intel 6xx series chipsets, you don't have to enable/switch Intel Rapid Storage Technology manually if you want to mount a RAID, you just have to map under VMD your SATA Controller and/or PCIe SSDs to use RAID mode with SATA/PCIe HDDs/SSDs, this will automatically enable Intel Rapid Storage Technology / RAID mode.
Now for your case it seems to me that you are not looking to mount a RAID, so you need revert your action by disabling Intel Rapid Storage Technology manually then :- Either leave VMD enabled (default) but your SATA Controller and/or PCIe SSDs should not be mapped under VMD.
- Either disable VMD.
I posted a detailed explanation about what changed since Intel 6xx series chipsets here : https://rog.asus.com/forum/showthread.php?117609-DRIVERS-Intel-Chipset-MEI-SATA-VMD-(1xx-2xx-3xx-4xx...
Bro, so in another word I just need to disable the Intel Rapid Storage Technology in bios. And leave the VMD by default value or disable the VMD. I have no intention to mount a RAID. Please advice and thank you.
I answered you in a more detailed way because I was not sure of your intentions and why you wanted at all costs to manually enable Intel Rapid Storage Technology.