BIOS: Change SATA Operations from RAID to AHCI, without loosing Windows boot, even if no RAID is used

As seen in Install Ubuntu 18.04 along Windows 10 on a Dell Alienware m15 with NVME disks, we need to change a BIOS setting in order to make the NVME disks visible to the Ubuntu installer.

Note 1:  this is necessary but not sufficient to make the NVME disks visible by Ubuntu installer, see also Make NVME disks visible to Ubuntu USB-key installer

Note 2: changing this setting is necessary, even if you do not use RAID on your hard drives.

Let’s go.

Step 0

  • From Windows 10, run CMD as administrator (Start Button, type CMD, choose Run as administrator)
  • Type: bcdedit /set {current} safeboot minimal
  • Reboot.

Step 1

  • At boot time, get into the BIOS (on a Dell/Alienware, press F2 just when logo is appearing).
  • Change SATA Operations from RAID on to AHCI.
  • Save and reboot to Windows 10 (that will be in Safe Mode).

Step 2

  • Windows is in Safe mode, launch again CMD as administrator
  • Type: bcdedit /deletevalue {current} safeboot
  • Reboot to Windows 10. Everything should be OK.

Conclusion

This procedure ensures that:

  1. Your NVME disks will be visible by the Ubuntu installer
  2. Your Windows 10 will still be correctly booting (before and after Ubuntu installation).

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