Let me help you with this.
It is important to say that the CTRL-I option you saw at the beginning is because the chipset mode is set as RAID so in the case it is not visible anymore, I recommend you checking at the BIOS level for the Chipset mode to be set as RAID.
New Branded computers (OEMs) come with their original Operating System that has been designed specifically for that computer to make sure that all components will be working fine. If changing the hardware or the software you may lose special features from the system.
I recommend you checking the Intel® Rapid Storage Technology user guide at this link: