I bought a new Dell laptop with two separate hard disks. One 128GB SSD with pre-installed Windows 10 and one 1Tb HDD (let's say dev/sdb). I'm trying to install Ubuntu 18.04 in a partition dev/sdb2. I'm trying to find the SSD efi partition but the wizard doesn't show it up. I run os-prober but I get no results.
Also followed this guide: Dual Boot Windows 10 and Linux Ubuntu on Separate Hard Drives
with no success as no GRUB OS choice is shown.
Any idea on how to get Ubuntu to detect the SSD?
Best Answer
Check in your BIOS for how the disks are setup. They're probably set to RAID. Ubuntu won't install unless you change this.
You don't need to reinstall Windows...
Some folks have found the 2nd choice that I provide easier to do...
Make sure to have a backup of your important Windows files!
You've got a single SSD set up in RAID mode, and the Ubuntu installer won't recognize your SSD until you switch your disk setting in the BIOS from RAID to AHCI.
Making that switch comes with some problems though, as Windows will no longer boot.
Choice #1: Looking at this article https://samnicholls.net/2016/01/14/how-to-switch-sata-raid-to-ahci-windows-10-xps-13/ will show you how to make the change without having to reinstall Windows.
Now you should be able to install Ubuntu in a dual-boot configuration.
Choice #2: See http://triplescomputers.com/blog/uncategorized/solution-switch-windows-10-from-raidide-to-ahci-operation/