Hello, so i'm very new to linux and i'm attempting to install arch alongside windows, i have windows with it's efi partition on a separate drive and preferably; i would like the efi partitions to be separate as i have a feeling i'm going to screw up, how would i go about configuring grub to detect windows on my other drive, if this is even possible ? As it stands right now bios only recognizes the windows boot manager and bootable arch usb. Any help / advice here would be much appreciated, cheers.
#[SOLVED]Configuring grub for 2 efi partitions on separate drives.
livid umbra
vague robin
Uh, I think in this case you would boot from the Windows drive to use its bootloader and boot from the Linux drive to launch grub. Is there any reason you might want to launch Windows from grub specifically?
You could also alter the grub config file, update it automatically using os-prober and grub2-mkconfig, according to this post: https://superuser.com/questions/899002/how-can-i-boot-windows-from-external-hard-drive-using-grub
livid umbra
Uh, I think in this case you would boot from the Windows drive to use its bootlo...
No i just want a solution where both efi partititions can be kept separate so i don't mess up windows when experimenting with linux.
vague robin
Oh, okay, then I'd say change the drive you boot with depending.
You can always update grub later, if you want.
This would basically be using your bios as a secondary bootloader, sort of. Some systems make this more efficient than others.
livid umbra
This would basically be using your bios as a secondary bootloader, sort of. Some...
so if i understand this correctly i would be telling the bios what drive to boot from ?
vague robin
so if i understand this correctly i would be telling the bios what drive to boot...
correct. like an external drive.
and that should work fine as long as each drive has a bootloader.
livid umbra
i would like this approach just one issue, my arch install is not showing up there for some reason but maybe it's an issue i will have to bring elsewhere ?
vague robin
we can address that here. do you have arch install flashed to a USB?
livid umbra
usb ssd, yes
livid umbra
yeah it says something like uefi boot and i select it and it brings me to the arch live environment
but the actual install i made is not selectable from the bios
vague robin
and you don't currently have arch installed, right? or did you try to install it to a certain drive?
livid umbra
yeah i should have it installed with grub on a separate drive from the windows drive
vague robin
okay, so, you'll need to go into your bios, not selecting uefi or legacy, but, instead, selecting boot devices.
can you enter your bios?
vague robin
alright, depending on your bios, the boot devices will be different places. try to find them.
livid umbra
Boot options right ?
vague robin
probably.
did you find your boot devices? if you're feeling lost, you could send a pic.
livid umbra
Ohhhh i see now
vague robin
yay!
vague robin
neat!
from inside arch, you can configure grub to handle windows also, if you want.
the linked solution might work for that.
livid umbra
Okay and thats with os-prober right?
vague robin
correct.
i know os-prober can detect secondary operating systems, but i'm not familiar with this use, combining it with grub-mkconfig.
livid umbra
Okay i will do more research but this is a way forwards, thanks alot!
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