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

From: Kris Moore
Subject: Re: Does grub-mkrescue support UEFI hybrid USB/DVD images?
Date: Fri, 23 Jan 2015 09:40:48 -0500
User-agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0

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
> _______________________________________________
> Grub-devel mailing list
> address@hidden

Vladimir's patch did fix the issue here, thanks!


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

Kris Moore
PC-BSD Software

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