Is It Possible to Create a RAID 1 Volume after Installing the OS in Advance Host Controller Interface (AHCI) Mode?

Can I set up a RAID 1 Mirror after installing the operating system on a system configured in AHCI mode?

Many systems have the SATA controller set to AHCI in the BIOS by default.  Before creating a RAID 1 volume the operating system will need to be reinstalled.

To have a RAID-ready system, follow these steps:

1. Confirm with the system vendor the platform supports Intel® RST.
2. Enable RAID/RST Premium in system BIOS.
3. Install the Intel® Rapid Storage Technology driver during Windows* OS installation.
4. Install Intel® Optane™ Memory and Storage Management application from the Microsoft Store*.

To convert a RAID-ready system into a system with a two-drive RAID 1 volume, follow these steps:

1. Install a second drive in the system.
2. Boot Windows and open the Intel® Optane™ Memory and Storage Management software.
3. Select Create Volume.
4. Name the volume.
5. Select Volume Type Real-time data protection (RAID 1) and then click Next.
6. On the Create Volume screen:
   • Select the two installed disks.
   • Choose to keep data on the “System” disk.
   • Click Next.
7. Review the warning screen and then click Create Volume.
8. Confirm the RAID array is available on the Manage screen.