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Re: [Bug-xorriso] Test Proposal for [bug #46716] Protective MBR partitio

From: Andrei Borzenkov
Subject: Re: [Bug-xorriso] Test Proposal for [bug #46716] Protective MBR partition is not marked as bootable
Date: Sun, 20 Dec 2015 20:08:51 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.4.0

20.12.2015 13:50, Thomas Schmitt пишет:
> Hi,
> Andrei Borzenkov wrote:
>> As expected, GRUB cannot access second partition when booted as CD,
>> either in BIOS or EFI mode. It can when booted as HDD with 512B sector
>> in both BIOS and EFI mode.
> I have quite contrary results here.
> - The repacked ISO works for me on BIOS qemu -hda and -cdrom,
>   and on OVMF qemu -cdrom.

Try access ESP content. The first version (without APM) sees
(cd0,mdsos2) partition but cannot access content. The second one sees
three Apple partitions, only the first one has recognizable HFS+ filesystem.

As I said already, grub itself does not need ESP, it puts full content
on ISO which is accessible as unpartitioned device. But we do not know
if people do not rely on it (there were requests to make embedded
el-torito ESP accessible and this is exactly what happens now).

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