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[PATCH 1/3] grub-mkrescue: Add support for FAT and NTFS on EFI boot

From: Pete Batard
Subject: [PATCH 1/3] grub-mkrescue: Add support for FAT and NTFS on EFI boot
Date: Mon, 6 Jun 2022 17:50:31 +0100

In order to add file system transposition support for UEFI, i.e. the ability
to copy the content of an ISO9660 grub-mkrescue ISO image onto user-formatted
media, and have that boot on UEFI systems, the first thing we need to do is
add support for the file systems that are natively handled by UEFI.
This mandatorily includes FAT and we also include NTFS as the latter is also
commonly supported on modern x64 platforms.

Signed-off-by: Pete Batard <>
 util/grub-mkrescue.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/util/grub-mkrescue.c b/util/grub-mkrescue.c
index ba89b1394..1257476fb 100644
--- a/util/grub-mkrescue.c
+++ b/util/grub-mkrescue.c
@@ -754,6 +754,9 @@ main (int argc, char *argv[])
       grub_install_push_module ("part_gpt");
       grub_install_push_module ("part_msdos");
+      grub_install_push_module ("fat");
+      /* Many modern UEFI systems also have native support for NTFS */
+      grub_install_push_module ("ntfs");
       imgname = grub_util_path_concat (2, efidir_efi_boot, "bootia64.efi");
       make_image_fwdisk_abs (GRUB_INSTALL_PLATFORM_IA64_EFI, "ia64-efi", 
@@ -831,6 +834,8 @@ main (int argc, char *argv[])
       free (efidir);
       grub_install_pop_module ();
       grub_install_pop_module ();
+      grub_install_pop_module ();
+      grub_install_pop_module ();
   grub_install_push_module ("part_apple");

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