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Re: [PATCH] grub-install: Allow to install to non-EFI ESP when --force

From: Daniel Kiper
Subject: Re: [PATCH] grub-install: Allow to install to non-EFI ESP when --force
Date: Wed, 27 Apr 2022 15:44:15 +0200
User-agent: NeoMutt/20170113 (1.7.2)

On Sun, Apr 24, 2022 at 03:36:33PM +0800, Icenowy Zheng wrote:
> Although the EFI specification enforces support for FAT ESP, it's free
> for EFI implementations to implement support for ESPs with other formats
> (e.g. ext4, ntfs, etc), and at least U-Boot EFI will support ext4 ESP if
> U-Boot is built with ext4 support. In some situations a GRUB
> installation on such a non-FAT ESP could be useful (e.g. a NTFS-based
> USB disk that can dual boot a Windows installation media and a Linux
> LiveCD).
> As this is advanced and implementation-dependent behavior, let
> grub-install allow this kind of installation, but only when --force is
> specified.
> Signed-off-by: Icenowy Zheng <>

Reviewed-by: Daniel Kiper <>


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