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Re: Removing CSM compability from grub bootloader.

From: David Balažic
Subject: Re: Removing CSM compability from grub bootloader.
Date: Wed, 5 Aug 2020 18:44:45 +0200

Legacy boot is done from the boot sector (MBR), so replace it with a
"vanilla" (empty) boot sector. Maybe just marking none of the
partitions as bootable will be enough. (clearing the boot sector may
delete your partitions, so careful)


On Wed, 5 Aug 2020 at 15:09, noone atall <> wrote:
> help-grub <> is a list for
> getting help for GRUB. Subscription to the list is not required to post a
> question
> Hi,
> I read this and i hoped it would be okay to ask a question.
> I have an old motherboard that is unable to boot usb devices in EFI mode.
> Which means it only boots hard drives and cd/dvd in efi mode. As i have
> encountered some issues with dvds and i don't like them in general i
> decided to use hard drives as installation media.
> However, the Manjaro linux iso is set to boot both modes. As it is based on
> grub i decided to try my luck asking help on grub forums, which apparently
> is not present so here i am.
> Long story short I would very much appreciate it if you could tell me which
> files and folders one needs to remove from grub bootloader to destroy it's
> capability to boot on legacy BIOS firmware.

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