Setup both operating systems on the same machine simultaneously.
Setup both operating systems on the same machine simultaneously.
You're considering using an SD card as a boot loader for your dual-boot setup. It's a creative approach, but there are some challenges to keep in mind. Running Linux from an SD card is technically possible on many modern laptops, especially if they support it. However, the main concern is stability—especially with frequent updates. If the laptop can boot from the SD card, the Windows update process might not interfere as much because the boot loader would remain intact. The downside is that SD cards are slower and prone to wear over time, which could affect performance. It’s a viable option if your device supports it, but you should test it thoroughly before relying on it for critical systems.
It's easy to suggest setting up GRUB on an SD card, but most computers don't support booting from them. Give it a try.
Certainly, you could achieve the same with a USB port if it supported SD cards, though I understand some laptops permit booting from SD, which might be preferable over using a USB slot. Since I won’t rely heavily on an SD slot for other purposes, the main concern is finding the optimal method. I believe a dedicated boot loader on the SD card would be ideal, steering clear of modifying the standard ones. However, it’s possible the built-in GRUB loader needs to be configured to target the SD card, which could require some adjustments to understand properly.
Your laptop supports booting from an SD card. You can install os-prober and set GRUB_DISABLE_OS_PROBER=false in /etc/default/grub. This ensures grub recognizes both Windows and Linux when you run grub-mkconfig -o /boot/grub/grub.cfg. Keep in mind you’ll also need to add ntfs-3g to your package list (as shown on Arch) and mount the Windows partition somewhere so os-prober can identify it.
Avoid issues with MBR corruption by not needing a separate physical disk if you don’t have one. Even with just a single disk, you can sidestep some Windows boot problems by using UEFI setup. Set up your Windows installation first, then create a distinct EFI partition for Linux. To guide the firmware on which files are bootable, use the efibootmgr command and consult its brief manual. If concerned about Windows overwriting EFI settings, name your EFI boot image in a generic way so the motherboard recognizes it automatically. For Linux bootloaders like GRUB, enable the --removable flag with grub-install to treat the EFI image as a removable disk. When booting without a bootloader (EFI stub mode), choose an appropriate name such as EFI/boot/bootx64.efi. Alternatively, skip bootloaders entirely and rely on UEFI’s built-in selection—select your operating system by picking the correct boot disk at startup. If you’re certain Windows won’t corrupt your EFI data (a safe bet after years without real hardware), just use a single EFI partition and run efibootmgr to inform UEFI of your Linux OS. For broader guidance on UEFI multibooting, there’s a helpful overview available.