From: "Thomas Schmitt" <scdbackup@gmx.net>
To: bug-xorriso@gnu.org
Cc: guix-devel@gnu.org
Subject: Re: ISO installer image: GPT versus MBR partitions
Date: Sun, 21 Apr 2019 13:16:14 +0200 [thread overview]
Message-ID: <147867275872258208@scdbackup.webframe.org> (raw)
In-Reply-To: <20190421075847.ka4aeseg6kgfufz4@pelzflorian.localdomain>
Hi,
i plan to ask at gru-devel about mformat, its MBR, and the partition entry,
as soon as the last experiment is made (LBA 1 rather than LBA 0 as start
of the inner partition).
For that discussion i could also need the exact model name of the Macbook.
If its EFI has a name, then this too.
Florian Pelz wrote:
> +--- grub-2.02/util/grub-mkrescue.c 2019-04-21 08:17:18.880000000 +0200
> ++++ grub-2.02/util/grub-mkrescue.c 2019-04-21 08:17:52.588000000 +0200
> [...]
> +- { "mformat", "-C", "-f", "2880", "-L", "16",
> ++ { "mformat", "-k", "-C", "-f", "2880", "-L", "16",
The difference between the contents of the first image block with and
without option -k is significant, at least if we ask program "file".
If a special version of gub-mkrescue is acceptable, then i would rather
propose to apply the dd treatment to efiimgfat after mformat created
it without option -k.
We could ask at grub-devel for advise how to write 16 bytes to that file
without needing another shell command. (It's C language, after all.)
The binary differences between both blocks 0, except partition entry, are:
/efi.img from Guix 0.16.0
#########################
Image from mformat -k
00000000 : eb 3c 90 4d 54 4f 4f 34 30 32 31 00 02 01 01 00
### ### ### ### ### ### ### ### ### ### ###
00000000 : 00 00 00 00 00 00 00 00 00 00 00 00 02 01 01 00
00000020 : 00 00 00 00 00 00 29 a7 48 66 33 4e 4f 20 4e 41
### ### ### ###
00000020 : 00 00 00 00 00 00 29 42 87 4b 7d 4e 4f 20 4e 41
00000030 : 4d 45 20 20 20 20 46 41 54 31 32 20 20 20 fa 31
### ###
00000030 : 4d 45 20 20 20 20 46 41 54 31 32 20 20 20 00 00
00000040 : c0 8e d8 8e c0 fc b9 00 01 be 00 7c bf 00 80 f3
### ### ### ### ### ### ### ### ### ### ### ### ###
00000040 : 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000050 : a5 ea 56 00 00 08 b8 01 02 bb 00 7c ba 80 00 b9
### ### ### ### ### ### ### ### ### ### ### ###
00000050 : 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000060 : 01 00 cd 13 72 05 ea 00 7c 00 00 cd 19 00 00 00
### ### ### ### ### ### ### ### ###
00000060 : 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
...
000001f0 : 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa
### ###
000001f0 : 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Have a nice day :)
Thomas
next prev parent reply other threads:[~2019-04-21 11:14 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190415165451.dpzngealeisbibc7@pelzflorian.localdomain>
[not found] ` <1582867226375139246@scdbackup.webframe.org>
2019-04-16 9:57 ` bug#33639: ISO installer image is broken on i686 Gábor Boskovits
2019-04-16 13:40 ` ISO installer image: GPT versus MBR partitions (was bug#33639) Thomas Schmitt
2019-04-16 16:32 ` pelzflorian (Florian Pelz)
2019-04-16 17:57 ` ISO installer image: GPT versus MBR partitions Thomas Schmitt
2019-04-16 19:55 ` pelzflorian (Florian Pelz)
2019-04-16 20:31 ` pelzflorian (Florian Pelz)
2019-04-16 21:15 ` Thomas Schmitt
2019-04-17 8:59 ` pelzflorian (Florian Pelz)
2019-04-17 10:23 ` Thomas Schmitt
2019-04-17 10:30 ` pelzflorian (Florian Pelz)
2019-04-17 15:51 ` Thomas Schmitt
2019-04-17 22:35 ` pelzflorian (Florian Pelz)
2019-04-18 6:32 ` Thomas Schmitt
2019-04-18 7:00 ` Thomas Schmitt
2019-04-18 7:07 ` pelzflorian (Florian Pelz)
2019-04-18 8:13 ` Thomas Schmitt
2019-04-18 12:19 ` pelzflorian (Florian Pelz)
2019-04-18 13:50 ` Thomas Schmitt
2019-04-18 21:28 ` Thomas Schmitt
2019-04-19 7:29 ` pelzflorian (Florian Pelz)
2019-04-19 8:03 ` pelzflorian (Florian Pelz)
2019-04-19 9:01 ` Thomas Schmitt
2019-04-19 9:39 ` pelzflorian (Florian Pelz)
2019-04-19 10:58 ` Thomas Schmitt
2019-04-19 14:57 ` pelzflorian (Florian Pelz)
2019-04-19 11:30 ` pelzflorian (Florian Pelz)
2019-04-19 18:33 ` pelzflorian (Florian Pelz)
2019-04-19 19:23 ` Thomas Schmitt
2019-04-20 10:26 ` pelzflorian (Florian Pelz)
2019-04-20 10:50 ` Thomas Schmitt
2019-04-20 11:16 ` Thomas Schmitt
2019-04-20 11:29 ` Thomas Schmitt
2019-04-20 14:23 ` Thomas Schmitt
2019-04-20 14:54 ` pelzflorian (Florian Pelz)
2019-04-20 15:17 ` pelzflorian (Florian Pelz)
2019-04-20 15:33 ` pelzflorian (Florian Pelz)
2019-04-20 16:32 ` Thomas Schmitt
2019-04-21 7:58 ` pelzflorian (Florian Pelz)
2019-04-21 9:35 ` Thomas Schmitt
2019-04-21 11:10 ` pelzflorian (Florian Pelz)
2019-04-21 11:16 ` Thomas Schmitt [this message]
2019-04-21 11:56 ` pelzflorian (Florian Pelz)
2019-04-21 12:27 ` Thomas Schmitt
2019-04-21 14:11 ` pelzflorian (Florian Pelz)
2019-04-21 14:36 ` Thomas Schmitt
2019-04-22 13:11 ` Thomas Schmitt
2019-04-23 16:40 ` pelzflorian (Florian Pelz)
2019-04-23 17:23 ` Thomas Schmitt
2019-04-17 12:24 ` Ludovic Courtès
2019-04-17 13:42 ` pelzflorian (Florian Pelz)
2019-04-23 18:14 ` Thomas Schmitt
2019-04-23 19:50 ` pelzflorian (Florian Pelz)
2019-04-23 20:18 ` Thomas Schmitt
2019-04-23 21:43 ` pelzflorian (Florian Pelz)
2019-04-24 6:56 ` Thomas Schmitt
2019-04-24 9:13 ` pelzflorian (Florian Pelz)
2019-04-24 10:34 ` Thomas Schmitt
2019-04-24 22:13 ` Danny Milosavljevic
2019-04-25 7:07 ` Thomas Schmitt
2019-04-25 9:45 ` pelzflorian (Florian Pelz)
2019-04-25 13:44 ` Thomas Schmitt
2019-04-25 14:59 ` Danny Milosavljevic
2019-04-25 16:22 ` Thomas Schmitt
2019-04-25 17:55 ` Danny Milosavljevic
2019-04-25 18:46 ` Thomas Schmitt
2019-04-25 19:01 ` Danny Milosavljevic
2019-04-25 16:34 ` Ludovic Courtès
2019-04-26 11:34 ` pelzflorian (Florian Pelz)
2019-04-26 14:41 ` Ludovic Courtès
2019-04-26 15:30 ` pelzflorian (Florian Pelz)
2019-04-26 13:57 ` Thomas Schmitt
2019-04-27 13:20 ` Ludovic Courtès
2019-04-27 16:24 ` Thomas Schmitt
2019-04-28 12:53 ` Ludovic Courtès
2019-04-25 11:49 ` pelzflorian (Florian Pelz)
2019-04-25 15:09 ` Thomas Schmitt
2019-04-25 15:58 ` pelzflorian (Florian Pelz)
2019-04-25 16:40 ` Thomas Schmitt
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