Dual Booting NixOS and Windows: Difference between revisions
Phanirithvij (talk | contribs) m remove original and have only archive mirror |
IFreilicht (talk | contribs) Add method to boot Windows if it is installed on a different drive than NixOS |
||
| Line 121: | Line 121: | ||
==== EFI with multiple disks ==== | ==== EFI with multiple disks ==== | ||
===== systemd-boot ===== | |||
As systemd-boot cannot directly load binaries from other ESPs<ref>https://github.com/systemd/systemd/issues/3252</ref>, let alone other disks, we have to employ [https://search.nixos.org/packages?channel=unstable&show=edk2-uefi-shell&from=0&size=50&sort=relevance&type=packages&query=edk2-uefi-shell edk2-uefi-shell] to implement a chainloading strategy<ref>https://wiki.archlinux.org/title/Systemd-boot#Boot_from_another_disk</ref>. The basic config looks like this:{{File|/etc/nixos/configuration.nix|nix|<nowiki> | |||
{ config, ... }: | |||
{ | |||
boot.loader = { | |||
systemd-boot.enable = true; | |||
efi.canTouchEfiVariables = true; | |||
# Copy EDK2 Shell to boot partition | |||
systemd-boot.extraFiles."efi/shell.efi" = "${pkgs.edk2-uefi-shell}/shell.efi"; | |||
systemd-boot.extraEntries = { | |||
# Chainload Windows bootloader via EDK2 Shell | |||
"windows.conf" = | |||
let | |||
# To determine the name of the windows boot drive, boot into edk2 first, then run | |||
# `map -c` to get drive aliases, and try out running `FS1:`, then `ls EFI` to check | |||
# which alias corresponds to which EFI partition. | |||
boot-drive = "FS1"; | |||
in | |||
'' | |||
title Windows Bootloader | |||
efi /efi/shell.efi | |||
options -nointerrupt -nomap -noversion ${boot-drive}:EFI\Microsoft\Boot\Bootmgfw.efi | |||
sort-key y_windows | |||
''; | |||
# Make EDK2 Shell available as a boot option | |||
"edk2-uefi-shell.conf" = '' | |||
title EDK2 UEFI Shell | |||
efi /efi/shell.efi | |||
sort-key z_edk2 | |||
''; | |||
}; | |||
}; | |||
}</nowiki>}}You can try if this works without changes, but most likely you have to modify the value of <code>boot-drive</code> first to match your hardware configuration. | |||
First, make sure you <code>nixos-rebuild switch</code> or <code>nixos-rebuild boot</code> , then reboot your machine and select the entry "EDK2 UEFI Shell" from the systemd-boot menu. In this shell, run the command <code>map -c</code> to get a list of all "consistent" device mappings:<syntaxhighlight lang="text"> | |||
Press ESC in 1 seconds to skip startup.nsh or any other key to continue. | |||
Shell> map -c | |||
Mapping table | |||
HD0c3: Alias(s):FS0:;BLK7: | |||
PciRoot(0x0)/Pci(0x1,0x1)/Ata(0x0)/HD(3,GPT,5CBAF773-8FFA-11EB-952D-FCAA14203853,0x1DAA6000,0x32000) | |||
HD0d1: Alias(s):FS1:;BLK10: | |||
PciRoot(0x0)/Pci(0x1,0x1)/Ata(0x0)/HD(1,GPT,7F623BEA-5891-49EE-9980-6534716F0F50,0x800,0x1F4000) | |||
</syntaxhighlight>Then, change to each of these drives by entering the drive name (not one of the aliases!) and check whether the Windows bootloader is present:<syntaxhighlight lang="text"> | |||
Shell> HD0d1: | |||
HD0d1:\> ls EFI | |||
Directory of: HD0d1:\EFI\ | |||
09/21/2024 22:05 <DIR> 4,096 . | |||
09/21/2024 22:05 <DIR> 0 .. | |||
09/21/2024 23:08 <DIR> 4,096 BOOT | |||
09/21/2024 22:05 <DIR> 4,096 Linux | |||
09/24/2024 08:30 <DIR> 4,096 nixos | |||
01/01/1980 00:00 1,060,672 shell.efi | |||
09/21/2024 23:08 <DIR> 4,096 systemd | |||
1 File(s) 1,060,672 bytes | |||
6 Dir(s) | |||
HD0d1:\> HD0c3: | |||
HD0c3:\> ls EFI | |||
Directory of: HD0c3:\EFI\ | |||
03/28/2021 21:28 <DIR> 1,024 . | |||
03/28/2021 21:28 <DIR> 0 .. | |||
03/28/2021 21:28 <DIR> 1,024 Boot | |||
03/28/2021 21:28 <DIR> 1,024 Microsoft | |||
0 File(s) 0 bytes | |||
4 Dir(s) | |||
</syntaxhighlight>In this case, HD0d1 is the ESP of our NixOS installation, and HD0c3 is the ESP of Windows. | |||
After entering the Windows ESP, you can boot into it by running <code>EFI\Microsoft\Boot\Bootmgfw.efi</code>. This is also useful if you have multiple Windows installations and want to find out which ESP belongs to which installation. | |||
After this, you can change the value of <code>boot-drive</code> in the configuration snippet above, <code>nixos-rebuild switch</code> and reboot to boot into windows. Make sure that you use the actual device name, not one of the aliases, as these might not be available immediately on boot, making the shell invocation fail. | |||
===== Grub ===== | |||
In Grub, the following might work: | |||
{{File|/etc/nixos/configuration.nix|nix|<nowiki> | {{File|/etc/nixos/configuration.nix|nix|<nowiki> | ||