As it seems my ASUS P8P67LE motherboard has built-in RAID capability. My OS is previously installed in normal mode and in BIOS setting SATA MODE is set to AHCI (Advance host controller interface)
Now i want to add 2 HDDs and create a RAID1 only with that 2 HDDs and leave the other HDDs the same as the previous status (no raid)
As i searched, i should go in BIOS setting and set the SATA MODE to RAID (instead of AHCI) and create a RAID 1 by entering the raid setup( in boot time ctrl+l) and then i need to revert back the setting to AHCI instead of raid. Is this ok? What is the correct approach for my case.