[NAME]  FYI Linux is notoriously problematic on Alienware systems, so you might want to do some research before you spend a lot of time on something that you’re unlikely to get working satisfactorily. But disabling Intel RST is achieved by going into your BIOS and switching from RAID mode to AHCI mode. After you do this, your existing Windows installation will need to be booted in Safe Mode once before it will boot again in Normal mode.
I'm trying to dual boot Ubuntu with Windows 10 on my Alienware 15 R4. The Ubuntu installer says I have to disable IRST (Intel Rapid Storage Technology). How do I do that? 
15 R4, Ubuntu install, disable IRST?