I have two SSD : /sdc with Windows 10 in Legacy mode, and /sdb with Manjaro installed. (/sda is a 2Tb HDD without OS on it). Here's my problem: it always boots directly on Windows 10.
At worst, I would like to be able to manually boot on /sdb, and for exemple, if I want to reboot on Windows, manually change the boot device to /sdc going through BIOS on each reboot.
At best, always booting on /sdb and having GRUB leaving me the choice of which SSD I want to boot.
Here's some informations and some things did :
My Windows 10 uses legacy BIOS (msinfo32 displays BIOS mode : Legacy,
\WINDOWS\system32\winload.exefor the Windows Boot Loader's path. )
- My BIOS is set on "UEFI + Legacy mode" (only other option is UEFI).
- I've disabled fast boot and secure boot.
- I made my bootable USB key with Rufus 3.10 on Windows 10 with the default settings (Partition scheme : MBR ; Target system : Bios or UEFI).
- I booted on the USB Key without UEFI (meaning in the bios with UEFI + Legacy mode, I had the choice between like USB key or UEFI USB KEY. Picked without UEFI.
- With Manjaro Architect, I tried one install with Automatic Paritioning (BIOS & UEFI), and tried one other install using cfdisk (BIOS only). I installed GRUB on a special small partition (512mb) for boot (like you do in EFI mode ?)
- I tried booting directly on /sdb, even by completely disabling all other devices in the BIOS devices list, and it always boot on Windows 10 (/sdc)
- I ultimately physically unplugged my SSD /sdc, and I get a Windows BSOD telling me it can't boot on the OS. Still no boot on /sdb.
I'm running out of ideas and I'm getting tired of spending every evening on this. . There's probably something I must have missed, I'm not really goot at this. So I'm asking for your help, don't hesitate to ask other important informations I may have missed!
Thanks a lot!
Edit : I simply gave up and reinstalled Windows 10 in UEFI mode.