Re: Does grub-mkrescue support UEFI hybrid USB/DVD images?

[Kris Moore <kris@pcbsd.org>]

On 01/23/2015 05:14, Thomas Schmitt wrote:
> Hi,
>
> Vladimir wrote:
>> I think his EFI uses eltorito even from the stick. In that case we end
>> up in exactly the same scenario as CD-ROM.
> This contradicts all my beliefs about El Torito
> (and several wikis where i published them).
>
> I would like to see this theory verified:
>
> The first experiment would be to remove MBR and GPT.
> If the theory is right, then it should still boot.
> Next one should remove the El Torito catalog entry
> for the EFI boot image and check whether it does not
> boot any more.
> Finally it would be interesting to see whether it
> boots if the EFI boot image is only represented by
> MBR+GPT but not by El Torito.
>
> -----------------------------------------------------
> To Kris Moore:
>
> If Vladimir's patch does fix the problem, then i would
> be willing to patch such an improved ISO to the
> experimental forms mentioned above. Just give me a
> download URL. I will then determine the necessary dd
> commands for you to execute. (Small ISO preferred.)
>
>
> Have a nice day :)
>
> Thomas
>
>
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Vladimir's patch did fix the issue here, thanks!

Thomas,

Here's a very small ISO, no kernel or anything, around 40MB.

www.pcbsd.org/~kris/test-efigrub.iso

-- 
Kris Moore
PC-BSD Software
iXsystems