Editing Dell Precision 5520 (section)

== Notes for using NVMe drives ==
First, follow these instructions while switching (some detail is given below, but this has more detailed instructions, except for where to find the BIOS setting on the Dell laptop): https://support.thinkcritical.com/kb/articles/switch-windows-10-from-raid-ide-to-ahci

Boot into Windows normally, then enter an Admin Command Prompt, then type <code>bcdedit /set {current} safeboot minimal</code>.

Now, restart your computer and then enter the BIOS. To enter the BIOS, when turning on your computer, press the F2 key.

Then, click the + next to "System Configuration", then click on "SATA Operations", and change from RAID On to AHCI.

'''NOTE: I have tested booting Linux and Windows (201909 version with June 2020 patches) after changing the setting from RAID On to AHCI, so you can ''most likely'' ignore the warning.''' However, the worst case scenario is you may need to reinstall Windows - '''make a backup if you're concerned'''. Please tell us on Telegram if this has happened to you so we can help.

At the bottom-right corner of the screen, click "Apply Changes" and then "OK" (it doesn't matter if the settings are "Custom User Settings" - this only stores your BIOS settings so that you can restore them later if something goes wrong, you can either check it or uncheck it, up to you. You can ALWAYS restore to the default BIOS settings - this checkbox will not change that).

Then click "Exit".

Boot into Windows again, then enter an Admin Command Prompt, then type <code>bcdedit /deletevalue {current} safeboot</code>.

Reboot your computer. Test and see if Windows boots up normally (i.e. you can boot into it and Safe Mode should not appear after logging in). If so, congratulations! Move on to the next step. If not, retry the above steps. You can always revert back to "RAID On" at any time and Windows will likely still work. (Linux has no issues with switching.)

Next, add <code>nvme_load=YES</code> to the end of your kernel parameters. This is covered here: [[HP_ZBook_Studio_G4#Installing_Ubuntu_18.04_LTS_via_Flash_Drive]] (except instead of <code>acpi_osi=! acpi_osi="Windows 2009"</code> you will add <code>nvme_load=YES</code>)

Sources:

https://support.thinkcritical.com/kb/articles/switch-windows-10-from-raid-ide-to-ahci

https://superuser.com/questions/1022849/m-2-samsung-sm951-nvme-ssd-not-recognized-on-linux

https://www.dell.com/support/article/en-us/sln299303/loading-ubuntu-on-systems-using-pcie-m2-drives?lang=en