Hello [URL]   Converting Non-RAID disk to RAID Capable disk is a destructive process.   You would need to backup. Make sure drives are set to Raid Capable in the controller BIOS. Create the RAID1 you want, install/restore.   How to convert the physical disks mode to Non-RAID or RAID capable [URL]
I have installed a H730P mini installed in to my server and there is an existing Non-Raid install of ESXi which I do not want to lose but I want to change to a RAID Mirror. OMSA is not installed but I do have enterprise iDRAC is there anything I can do to set this up?
H730 Mini Non raid to mirror