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ravi
Asked: 2020-12-14 23:29:53 +0800 CST

INACCESSIBLE_BOOT_DEVICE in Windows 10 after changing SATA Configuration from RAID ON to AHCI

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I have installed Ubuntu 18.04 LTS on a Dual Boot Windows 10 Alienware Laptop. At first, the live Ubuntu installer couldn't detect the SSD inside so I changed the SATA configuration from RAID ON to AHCI. I could install Ubuntu without any problem after that.

However, because of changing to AHCI, now Windows 10 is not booting up and showing INACCESSIBLE_BOOT_DEVICE. Luckily, I was able to boot Windows 10 even after installing Ubuntu by changing the SATA configuration back to RAID ON. Then I followed the steps written here and changed "Storage Controllers" from Intel to Microsoft. Finally, I changed back to AHCI in boot options.

Later on, I also installed the Boot Repair tool on Ubuntu thinking that it will solve the issue. However, I still can not log in to Windows 10.

Any workaround, please?

grub2 windows dual-boot raid ahci

1 Answers

  1. Best Answer

    I could make it work after booting Windows 10 in safe mode for once. After that, it worked well.

    Please read the complete instructions from here.

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