I got 2 hard drives
- Samsung nvme SSD (Linux)
- Kingston SSD (Windows 10)
Boot options:
- Storage: UEFI
- Fast Boot: Disabled
This is working:
Fist I installed Arch Linux to Samsung nvme SSD. You can see the GRUB loader in this image. After that, I installed Windows 10. I have seen some comments about Windows EFI partition. But Windows 10 does not create an EFI partition. As you can seen in the image, There is a Windows boot record in Samsung nvme SSD (Windows is installed on Kingston SSD).
Now, I can load both Windows and Linux by selecting respective boot device from the boot menu. When I load Linux and repair the boot loader, os-prober will detect Windows partition and grub will add it to the menu. It will load Windows without any issue.
This is NOT working:
If I install Windows first and Linux after, os-prober can't find Windows 10.
NOTE:
- In all above cases I disabled Windows 10 fast startup option.
- In all above cases I made sure both operating systems are using UEFI
- I installed Windows and Linux multiple times to make sure this behavior is consistent
Why os-prober failed to find Windows partition when Windows is installed first?
