Windows 10: Inaccessible Boot Device after dual boot Ubuntu 18.04 Installation
I just got a Dell Inspiron 7580 with Windows 10 pre-installed. I wanted to install Ubuntu so I followed the usual instructions:
- Disabled Secure Boot
- Disabled Fast Startup
I tried to install from a USB stick but the installer could see no disks at all. I then switched from RAID to AHCI. The installation was completed successfully and everything seemed to work fine.
After the installation I wanted to check the pre-existing Windows 10 installation and selected Windows Boot Manager, only to see the infamous INACCESSIBLE_BOOT_DEVICE screen.
Everything is OK in the Ubuntu installation.
A pre-installed recovery tool from Dell reinstalled Windows 10 but still the INACCESSIBLE_BOOT_DEVICE message appears.
21 Answer
My problem was apparently different from the suggested question.
The issue I had was that in AHCI mode, Ubuntu booted and worked normally but Windows did not boot at all. Then I switched to RAID and noticed that Windows booted and worked normally but Ubuntu did not boot at all.
The problem was that I had switched from RAID to AHCI without safe mode in Windows. When I applied the same switch but in safe mode everything worked fine.
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