I got a new Lenovo Ideapad Flex 5, recently. Previously, I had been using a 10-year-old system. A lot of things have changed since then and I wasn't up-to-date with the latest tech.
So this new system has a single 500GB NVMe SSD and had Windows 10 pre-installed on it. Now I want to install Ubuntu as well (dual boot). For this, I shrunk my Windows partition to half (originally, there was only a single partition with Windows 10 installed on it).
Now I started the Ubuntu 18.04 setup (from a USB) and proceeded with installing it. But it couldn't recognize my SSD :(
So, I started digging in for a solution. I found that there's an option in the BIOS namely, SATA Controller Mode which was set to "Intel RST Premium" (the other option is AHCI).
A little bit lookup on the Internet tells me that Intel RST premium technology is an application for managing RAID arrays. So I am not sure what this BIOS option is.
I decided to just switch to AHCI mode but then I would have to re-install Windows 10 (which I don't want to). Furthermore, while changing to AHCI mode it gives me a warning – "Existing data stored on drivers will be erased when resetting controller mode. Proceed?", to which obviously I say No, because I don't know which "data" and "driver" is it talking about.
Also, let's say if I change to AHCI mode, do I lose some performance for Windows? (Oh c'mon, Intel RST Premium has cool words like rapid and premium in it. Don't tell me they are just for name's sake?!!)
Next, I also came across very similar questions on SE but some of them talk about how to switch to AHCI mode without re-installing Windows, while someone else talked about utilities such as
mdadm to configure things.
I am unsure what to do next. I just want to dual boot Windows and Ubuntu …and live a peaceful life.