Syslinux - Feb 2006 - Isolinux bug: CD bootsector support broken

HPA,
	I believe that support to boot windows CD bootsectors was broken
in 3.05. I have tested 2.13, 3.00, 3.02, 3.05, 3.06, 3.08, 3.11, and
3.20pre6. All versions >= 3.05 are broken. All versions <= 3.02 work
fine with the same config. The error message I get is:

===============================================================IOSLINUX 3.20
3.20-pre6   Copyright (C) 1994-2005 H. Peter Anvin
boot:
.

ISOLINUX 3.20 3.20-pre6 isolinux: Image checksum error, sorry...

Boot failed: press a key to retry...
===============================================================
	I looked in the various testing/ dirs to try to locate a -preX
for 3.05 to narrow down the exact version where it broke, but I was
unable to locate -preX releases for 3.05. I read the isolinux.doc and
NEWS to try to determine if the options have changed, but did not see
anything relevant. I read I tried to search the mailing list for similar
problems, but did not see anything similar.

	The CD is laid out like below. I have tried both longhorn and
w2003 CD bootsectors. The results are the same.

	I would be willing to try any betas to fix this, but it should
be easily reproducable. You can download the wxp10.zip from the BartPE
website to get the boot sector.

Thanks,
Michael Brown


[michael_e_brown at radon isolinuxpe]$ find .
.
./BOOTMGR
./BOOT.INI
./isolinux
./isolinux/isolinux.cfg
./isolinux/isolinux.bin
./isolinux/lhpe32.bin		<--- longhorn CD bootsector
./build-cd.sh
./BOOT
./BOOT/BOOT.SDI
./BOOT/BOOT.WIM

[michael_e_brown at radon isolinuxpe]$ cat isolinux/isolinux.cfg
default winpe

label winpe
  kernel lhpe32.bin

default winpe
prompt 1
timeout 100

[michael_e_brown at radon isolinuxpe]$

I suppose you asked mkisofs to not use version numbers in the file 
names. Also, do bootsectors of Win2K and WinXP work? Just curious if it 
is an artifact of Win2K3/longhorn boot sector.

- Murali

Michael_E_Brown at Dell.com wrote:
> HPA,
> 	I believe that support to boot windows CD bootsectors was broken
> in 3.05. I have tested 2.13, 3.00, 3.02, 3.05, 3.06, 3.08, 3.11, and
> 3.20pre6. All versions >= 3.05 are broken. All versions <= 3.02 work
> fine with the same config. The error message I get is:
>
> ===============================================================>
IOSLINUX 3.20 3.20-pre6   Copyright (C) 1994-2005 H. Peter Anvin
> boot:
> .
>
> ISOLINUX 3.20 3.20-pre6 isolinux: Image checksum error, sorry...
>
> Boot failed: press a key to retry...
> ===============================================================>
> 	I looked in the various testing/ dirs to try to locate a -preX
> for 3.05 to narrow down the exact version where it broke, but I was
> unable to locate -preX releases for 3.05. I read the isolinux.doc and
> NEWS to try to determine if the options have changed, but did not see
> anything relevant. I read I tried to search the mailing list for similar
> problems, but did not see anything similar.
>
> 	The CD is laid out like below. I have tried both longhorn and
> w2003 CD bootsectors. The results are the same.
>
> 	I would be willing to try any betas to fix this, but it should
> be easily reproducable. You can download the wxp10.zip from the BartPE
> website to get the boot sector.
>
> Thanks,
> Michael Brown
>
>
> [michael_e_brown at radon isolinuxpe]$ find .
> .
> ./BOOTMGR
> ./BOOT.INI
> ./isolinux
> ./isolinux/isolinux.cfg
> ./isolinux/isolinux.bin
> ./isolinux/lhpe32.bin		<--- longhorn CD bootsector
> ./build-cd.sh
> ./BOOT
> ./BOOT/BOOT.SDI
> ./BOOT/BOOT.WIM
>
> [michael_e_brown at radon isolinuxpe]$ cat isolinux/isolinux.cfg
> default winpe
>
> label winpe
>   kernel lhpe32.bin
>
> default winpe
> prompt 1
> timeout 100
>
> [michael_e_brown at radon isolinuxpe]$
>
> _______________________________________________
> SYSLINUX mailing list
> Submissions to SYSLINUX at zytor.com
> Unsubscribe or set options at:
> http://www.zytor.com/mailman/listinfo/syslinux
> Please do not send private replies to mailing list traffic.
>
>
>

Murali,
	It fails even before it hands off to the windows bootsector, so
I believe this is an isolinux bug. I reproduced the same issue with
winxp boot sectors. (from the wxp10.zip, mentioned below)

	Yes, I did use "-N" option to mkisofs. 
--
Michael

-----Original Message-----
From: Murali Krishnan Ganapathy [mailto:gmurali at cs.uchicago.edu] 
Sent: Tuesday, February 07, 2006 4:56 PM
To: Brown, Michael E
Cc: syslinux at zytor.com
Subject: Re: [syslinux] Isolinux bug: CD bootsector support broken

I suppose you asked mkisofs to not use version numbers in the file
names. Also, do bootsectors of Win2K and WinXP work? Just curious if it
is an artifact of Win2K3/longhorn boot sector.

- Murali

Michael_E_Brown at Dell.com wrote:
> HPA,
> 	I believe that support to boot windows CD bootsectors was broken
in 
> 3.05. I have tested 2.13, 3.00, 3.02, 3.05, 3.06, 3.08, 3.11, and 
> 3.20pre6. All versions >= 3.05 are broken. All versions <= 3.02 work 
> fine with the same config. The error message I get is:
>
> ===============================================================>
IOSLINUX 3.20 3.20-pre6   Copyright (C) 1994-2005 H. Peter Anvin
> boot:
> .
>
> ISOLINUX 3.20 3.20-pre6 isolinux: Image checksum error, sorry...
>
> Boot failed: press a key to retry...
> ===============================================================>
> 	I looked in the various testing/ dirs to try to locate a -preX
for 
> 3.05 to narrow down the exact version where it broke, but I was unable
> to locate -preX releases for 3.05. I read the isolinux.doc and NEWS to
> try to determine if the options have changed, but did not see anything
> relevant. I read I tried to search the mailing list for similar 
> problems, but did not see anything similar.
>
> 	The CD is laid out like below. I have tried both longhorn and
> w2003 CD bootsectors. The results are the same.
>
> 	I would be willing to try any betas to fix this, but it should
be 
> easily reproducable. You can download the wxp10.zip from the BartPE 
> website to get the boot sector.
>
> Thanks,
> Michael Brown
>
>
> [michael_e_brown at radon isolinuxpe]$ find .
> .
> ./BOOTMGR
> ./BOOT.INI
> ./isolinux
> ./isolinux/isolinux.cfg
> ./isolinux/isolinux.bin
> ./isolinux/lhpe32.bin		<--- longhorn CD bootsector
> ./build-cd.sh
> ./BOOT
> ./BOOT/BOOT.SDI
> ./BOOT/BOOT.WIM
>
> [michael_e_brown at radon isolinuxpe]$ cat isolinux/isolinux.cfg default 
> winpe
>
> label winpe
>   kernel lhpe32.bin
>
> default winpe
> prompt 1
> timeout 100
>
> [michael_e_brown at radon isolinuxpe]$
>
> _______________________________________________
> SYSLINUX mailing list
> Submissions to SYSLINUX at zytor.com
> Unsubscribe or set options at:
> http://www.zytor.com/mailman/listinfo/syslinux
> Please do not send private replies to mailing list traffic.
>
>
>

For posterity, here is my build cd script, and I am using a version of
mkisofs with level 4 support.
--
Michael

===============================#!/bin/sh

OUT=~/winpe_isolin.iso

DIR=$(cd $(dirname $0); pwd)


mkisofs -o $OUT \
        -b isolinux/isolinux.bin -c isolinux/boot.cat       \
        -no-emul-boot -boot-load-size 4 -output-charset cp437      \
        -allow-lowercase    \
        -r -iso-level 4 -boot-info-table -N $DIR/
===========================
[michael_e_brown at radon isolinuxpe]$ mkisofs --version
mkisofs 2.01 (i686-pc-linux-gnu) 

============================
-----Original Message-----
From: Murali Krishnan Ganapathy [mailto:gmurali at cs.uchicago.edu] 
Sent: Tuesday, February 07, 2006 4:56 PM
To: Brown, Michael E
Cc: syslinux at zytor.com
Subject: Re: [syslinux] Isolinux bug: CD bootsector support broken

I suppose you asked mkisofs to not use version numbers in the file
names. Also, do bootsectors of Win2K and WinXP work? Just curious if it
is an artifact of Win2K3/longhorn boot sector.

- Murali

Michael_E_Brown at Dell.com wrote:
> HPA,
> 	I believe that support to boot windows CD bootsectors was broken
in 
> 3.05. I have tested 2.13, 3.00, 3.02, 3.05, 3.06, 3.08, 3.11, and 
> 3.20pre6. All versions >= 3.05 are broken. All versions <= 3.02 work 
> fine with the same config. The error message I get is:
>
> ===============================================================>
IOSLINUX 3.20 3.20-pre6   Copyright (C) 1994-2005 H. Peter Anvin
> boot:
> .
>
> ISOLINUX 3.20 3.20-pre6 isolinux: Image checksum error, sorry...
>
> Boot failed: press a key to retry...
> ===============================================================>
> 	I looked in the various testing/ dirs to try to locate a -preX
for 
> 3.05 to narrow down the exact version where it broke, but I was unable
> to locate -preX releases for 3.05. I read the isolinux.doc and NEWS to
> try to determine if the options have changed, but did not see anything
> relevant. I read I tried to search the mailing list for similar 
> problems, but did not see anything similar.
>
> 	The CD is laid out like below. I have tried both longhorn and
> w2003 CD bootsectors. The results are the same.
>
> 	I would be willing to try any betas to fix this, but it should
be 
> easily reproducable. You can download the wxp10.zip from the BartPE 
> website to get the boot sector.
>
> Thanks,
> Michael Brown
>
>
> [michael_e_brown at radon isolinuxpe]$ find .
> .
> ./BOOTMGR
> ./BOOT.INI
> ./isolinux
> ./isolinux/isolinux.cfg
> ./isolinux/isolinux.bin
> ./isolinux/lhpe32.bin		<--- longhorn CD bootsector
> ./build-cd.sh
> ./BOOT
> ./BOOT/BOOT.SDI
> ./BOOT/BOOT.WIM
>
> [michael_e_brown at radon isolinuxpe]$ cat isolinux/isolinux.cfg default 
> winpe
>
> label winpe
>   kernel lhpe32.bin
>
> default winpe
> prompt 1
> timeout 100
>
> [michael_e_brown at radon isolinuxpe]$
>
> _______________________________________________
> SYSLINUX mailing list
> Submissions to SYSLINUX at zytor.com
> Unsubscribe or set options at:
> http://www.zytor.com/mailman/listinfo/syslinux
> Please do not send private replies to mailing list traffic.
>
>
>

Michael_E_Brown at Dell.com wrote:
> Murali,
> 	It fails even before it hands off to the windows bootsector, so
> I believe this is an isolinux bug. I reproduced the same issue with
> winxp boot sectors. (from the wxp10.zip, mentioned below)
> 
> 	Yes, I did use "-N" option to mkisofs. 
Could you run it with isolinux-debug.bin and record any output you get?

	-hpa

Ok. Typing manually, so any typos are mine. Looks like it is 
trying to reload itself rather than loading the bootsector.

==============================================================ISOLINUX 3.20
3.20-pre6  Copyright (C) 1994-2005 H. Peter Anvin
isolinux: Starting up, DL = 82
isolinux: Loaded spec packet OK, drive = 82
isolinux: Loading main image from LBA = 00000022
isolinux: Sectors to load = 0005
isolinux: Loaded boot image, verifying...
isolinux: Main image read, jumping to main code...
isolinux: Root directory at LBA = 00000019
isolinux: isolinux directory at LBA = 0000001E
isolinux: About to load config file...
isolinux: Configuration file opened...
boot:
.

ISOLINUX 3.20 3.20-pre6  Copyright (C) 1994-2005 H. Peter Anvin
isolinux: Starting up, DL = 82
isolinux: Loaded spec packet OK, drive = 82
isolinux: Loading main image from LBA = 00000022
isolinux: Sectors to load = 0005
isolinux: Loaded boot image, verifying...
isolinux: Image checksum error, sorry...

Boot failed: press a key to retry...
==============================================================
Random additional comment:
	I would have thought that you could use this feature to 
chainload isolinux from isolinux, but after trying this, it doesn't
work. The new version fails. (I thought it might save time to burn
an image with 3.02 and have chainload menus for every intermediate
version to check, rather than having to reburn my cdrw with every 
new version.

--
Michael


-----Original Message-----
From: H. Peter Anvin [mailto:hpa at zytor.com] 
Sent: Tuesday, February 07, 2006 6:14 PM
To: Brown, Michael E
Cc: gmurali at cs.uchicago.edu; syslinux at zytor.com
Subject: Re: [syslinux] Isolinux bug: CD bootsector support broken

Michael_E_Brown at Dell.com wrote:
> Murali,
> 	It fails even before it hands off to the windows bootsector, so
I 
> believe this is an isolinux bug. I reproduced the same issue with 
> winxp boot sectors. (from the wxp10.zip, mentioned below)
> 
> 	Yes, I did use "-N" option to mkisofs. 
Could you run it with isolinux-debug.bin and record any output you get?

	-hpa

hpa,
	Any idea on my original error?

	Thinking about it a bit, I realized I might have not been clear. The
isolinux-debug.bin output I sent in the prior mail
(http://syslinux.zytor.com/archives/2006-February/006529.html), is output from
when isolinux is configured to boot the WINDOWS cd boot sector, not isolinux.
:-)  Even though the debug output _looks_ like I may have configured isolinux to
try to boot isolinux, I have, in fact, configured it for windows cd boot sector
boot. Clear? I think my "random additional comment" may have made it
sound like the debug output was from trying to boot isolinux from isolinux, but
I can assure you that this was not the case.

	Doing absolutely nothing to the CD image except replacing isolinux.bin with
3.02 (and rerunning mkisofs, etc) will fix this. My isolinux.cfg is:
====================label winpe
  kernel lhpe32.bin

default winpe
prompt 1
timeout 100
====================
--
Michael

-----Original Message-----
From: H. Peter Anvin [mailto:hpa at zytor.com]
Sent: Wednesday, February 08, 2006 11:23 AM
To: Brown, Michael E
Cc: gmurali at cs.uchicago.edu; syslinux at zytor.com
Subject: Re: [syslinux] Isolinux bug: CD bootsector support broken


Michael_E_Brown at Dell.com wrote:
> 
> Random additional comment:
> 	I would have thought that you could use this feature to 
> chainload isolinux from isolinux, but after trying this, it doesn't
> work. The new version fails. (I thought it might save time to burn
> an image with 3.02 and have chainload menus for every intermediate
> version to check, rather than having to reburn my cdrw with every 
> new version.
> 
Well, it would work, but only if you could get mkisofs to update the 
metadata written into the alternate isolinux.bin files.  In fact, if you 
could do that, you could also get it to use an alternate root directory.

	-hpa