Thanks for the reply and your help, I will have to try to install the accompanying guide you sent me ( linked article ).So far as I know, that number is zero. Linux doesn't support RST - or, perhaps I should say it the other way? RST doesn't support Linux.
That page mentions some 'if' scenarios - but so far I've never encountered an 'if' scenario where RST was recognized. That's with multiple distros and multiple tests.
Granted, it has been about six months since I last tested this. I can find no information that indicates things have really changed. You pretty much have to disable it if you want to use Linux. The linked article will tell you the changes you have to make on Windows if you're dual booting with said OS.
I'm far from an expert. This is just my recent experience. I have a 2-3 year old Lenovo with Windows 10 and Optane which uses RST. I recently installed a spin of Fedora Workstation to dual boot. After having to disable Optane in the BIOS it installed just fine. The strange part is that the RST option in the BIOS refuses to be changed to ACHI. However both Windows and Fedora seem to be happy so far.Can anyone give me information on whether there is a distribution that I could install without being bothered by Intel RST?