When I set up unRAID as a VM on Mordor ESXi host, I reviewed the available solutions for configuring data drives for use in unRAID. I reached the conclusion that the optimal solution would be to use VMDirectPath I/O to passthrough the disks directly to unRAID, but I could not accomplish that successfully, and settled on using Raw Device Mapping. But now I got the IBM ServerRAID M1015 PCI-Express card I purchased on eBay (also available from Amazon), and I’m all set to install it and upgrade my setup!
Following is a step-by-step procedure of a successful install.
Below it I go over possible pitfalls that I actually encountered, as a useful reference of what to avoid.