Re: grub-mkrescue: Problem with MBR partition table at start of EFI partition

[Daniel Kiper]

On Sat, May 11, 2019 at 10:39:25PM +0200, Thomas Schmitt wrote:
> Hi,
>
> Florian Pelz wrote:
> > I guess this is off-topic and we cannot learn anything about the
> > permissibility of mformat -k from Windows?
>
> Yes.
>
> The on-topic conclusion so far is that i cowardly propose to zeroize
> the MBR partition table in the mformat result before populating it
> by mcopy.
> (Code snippets from SYS_AREA_SPARC around line 855 could be transplanted
>  and adapted to zeroize bytes 446 to 509 of efiimgfat.)
>
> Exploring the other differences between mformat with and without -k is
> probably useless, because the big truck makes its own lane anyway.

The thread is long and I am a bit lost. So, may I ask you to write
a summary of your findings, what works and what does not and how the issue
should be fixed and why this fix should land in the upcoming release.

Daniel