ISO won't start from within Grub menu...

lstar · **Joined:** Tue Apr 05, 2011 2:20 pm **Posts:** 9

Greetings,

I've made an iso out of a bootcd tool that uses WinPE v3 for its startup environment.

Using Grub menu, I start this iso with the commands:

title My Boot
find --set-root ubcd/custom/ISO/MyBoot.iso
map ubcd/custom/ISO/MyBoot.iso (hd32)
map --hook
chainloader (hd32)

However, I'm getting the error:

Error 13: Invalid or unsupported executable format

Press any key to continue...

I have defragged the iso using Wintig. Still same error.

I've also changed (hd32) to (0xff) same problem...

The iso boots fine stand alone when using Virtual Box.

Is there something unique about WinPE v3 that Grub does not like?

I've had success with WinPE v2 CD's like Vista Repair Disk.

Any insight is much appreciated.

Icecube · **Joined:** Fri Jan 11, 2008 2:52 pm **Posts:** 1277

Try with an additional slash:

Code:

title My Boot
find --set-root /ubcd/custom/ISO/MyBoot.iso
map /ubcd/custom/ISO/MyBoot.iso (hd32)
map --hook
chainloader (hd32)

Also try to enter the commands in the grub4dos prompt:
Boot into the grub4dos menu, press "C" and enter each line separately and look at the output it gives.

lstar · **Joined:** Tue Apr 05, 2011 2:20 pm **Posts:** 9

My memu.lst file does have the / "slash" in the path. I miss typing in during my post of the issue.

I ran the commands manually from a grub prompt.

Still getting same Error 13 message as mentioned above...

lstar · **Joined:** Tue Apr 05, 2011 2:20 pm **Posts:** 9

Figured it out...

Thanks for your help BTW, always good to have a second set of eyes...

lstar · **Joined:** Tue Apr 05, 2011 2:20 pm **Posts:** 9

Oh, BTW, do you know how to disable PXE scan in Grub?

Thanks.

Icecube · **Joined:** Fri Jan 11, 2008 2:52 pm **Posts:** 1277

Quote:

Figured it out...

What was the problem?

I don't think the PXE scan takes very long. I never had much problems with it.
You need to edit the embedded config file.

You can open grldr (end of the file) in a hexeditor and delete "pxe detect\n" (70 78 65 20 64 65 74 65 63 74 0a):

Code:

0003f0f0  07 00 00 00 07 00 00 00  b0 02 1a ce 00 00 00 00  |................|
0003f100  00 00 00 00 00 00 00 00  70 78 65 20 64 65 74 65  |........pxe dete|
0003f110  63 74 0a 63 6f 6e 66 69  67 66 69 6c 65 0a 64 65  |ct.configfile.de|
0003f120  66 61 75 6c 74 20 30 0a  74 69 6d 65 6f 75 74 20  |fault 0.timeout |
0003f130  31 0a 0a 74 69 74 6c 65  20 66 69 6e 64 20 2f 6d  |1..title find /m|
0003f140  65 6e 75 2e 6c 73 74 2c  20 2f 62 6f 6f 74 2f 67  |enu.lst, /boot/g|
0003f150  72 75 62 2f 6d 65 6e 75  2e 6c 73 74 2c 20 2f 67  |rub/menu.lst, /g|
0003f160  72 75 62 2f 6d 65 6e 75  2e 6c 73 74 0a 09 65 72  |rub/menu.lst..er|
0003f170  72 6f 72 63 68 65 63 6b  20 6f 66 66 0a 09 63 6f  |rorcheck off..co|
0003f180  6e 66 69 67 66 69 6c 65  20 2f 6d 65 6e 75 2e 6c  |nfigfile /menu.l|
0003f190  73 74 20 7c 7c 20 63 6f  6e 66 69 67 66 69 6c 65  |st || configfile|
0003f1a0  20 2f 4d 45 4e 55 2e 4c  53 54 0a 09 63 6f 6e 66  | /MENU.LST..conf|
0003f1b0  69 67 66 69 6c 65 20 2f  62 6f 6f 74 2f 67 72 75  |igfile /boot/gru|
0003f1c0  62 2f 6d 65 6e 75 2e 6c  73 74 20 7c 7c 20 63 6f  |b/menu.lst || co|
0003f1d0  6e 66 69 67 66 69 6c 65  20 2f 42 4f 4f 54 2f 47  |nfigfile /BOOT/G|
0003f1e0  52 55 42 2f 4d 45 4e 55  2e 4c 53 54 0a 09 63 6f  |RUB/MENU.LST..co|
0003f1f0  6e 66 69 67 66 69 6c 65  20 2f 67 72 75 62 2f 6d  |nfigfile /grub/m|
0003f200  65 6e 75 2e 6c 73 74 20  7c 7c 20 63 6f 6e 66 69  |enu.lst || confi|
0003f210  67 66 69 6c 65 20 2f 47  52 55 42 2f 4d 45 4e 55  |gfile /GRUB/MENU|
0003f220  2e 4c 53 54 0a 09 66 69  6e 64 20 2d 2d 73 65 74  |.LST..find --set|
0003f230  2d 72 6f 6f 74 20 2d 2d  69 67 6e 6f 72 65 2d 66  |-root --ignore-f|
0003f240  6c 6f 70 70 69 65 73 20  2d 2d 69 67 6e 6f 72 65  |loppies --ignore|
0003f250  2d 63 64 20 2f 6d 65 6e  75 2e 6c 73 74 20 26 26  |-cd /menu.lst &&|
0003f260  20 63 6f 6e 66 69 67 66  69 6c 65 20 2f 6d 65 6e  | configfile /men|
0003f270  75 2e 6c 73 74 0a 09 66  69 6e 64 20 2d 2d 73 65  |u.lst..find --se|
0003f280  74 2d 72 6f 6f 74 20 2d  2d 69 67 6e 6f 72 65 2d  |t-root --ignore-|
0003f290  66 6c 6f 70 70 69 65 73  20 2d 2d 69 67 6e 6f 72  |floppies --ignor|
0003f2a0  65 2d 63 64 20 2f 62 6f  6f 74 2f 67 72 75 62 2f  |e-cd /boot/grub/|
0003f2b0  6d 65 6e 75 2e 6c 73 74  20 26 26 20 63 6f 6e 66  |menu.lst && conf|
0003f2c0  69 67 66 69 6c 65 20 2f  62 6f 6f 74 2f 67 72 75  |igfile /boot/gru|
0003f2d0  62 2f 6d 65 6e 75 2e 6c  73 74 0a 09 66 69 6e 64  |b/menu.lst..find|
0003f2e0  20 2d 2d 73 65 74 2d 72  6f 6f 74 20 2d 2d 69 67  | --set-root --ig|
0003f2f0  6e 6f 72 65 2d 66 6c 6f  70 70 69 65 73 20 2d 2d  |nore-floppies --|
0003f300  69 67 6e 6f 72 65 2d 63  64 20 2f 67 72 75 62 2f  |ignore-cd /grub/|
0003f310  6d 65 6e 75 2e 6c 73 74  20 26 26 20 63 6f 6e 66  |menu.lst && conf|
0003f320  69 67 66 69 6c 65 20 2f  67 72 75 62 2f 6d 65 6e  |igfile /grub/men|
0003f330  75 2e 6c 73 74 0a 09 65  72 72 6f 72 63 68 65 63  |u.lst..errorchec|
0003f340  6b 20 6f 6e 0a 09 63 6f  6d 6d 61 6e 64 6c 69 6e  |k on..commandlin|
0003f350  65 0a 0a 74 69 74 6c 65  20 63 6f 6d 6d 61 6e 64  |e..title command|
0003f360  6c 69 6e 65 0a 09 63 6f  6d 6d 61 6e 64 6c 69 6e  |line..commandlin|
0003f370  65 0a 0a 74 69 74 6c 65  20 72 65 62 6f 6f 74 0a  |e..title reboot.|
0003f380  09 72 65 62 6f 6f 74 0a  0a 74 69 74 6c 65 20 68  |.reboot..title h|
0003f390  61 6c 74 0a 09 68 61 6c  74 0a 0a 00              |alt..halt...|
0003f39c

There is also a tool for easy editing the embedded grub4dos menu.lst, but it is in Chinese:
fbinst tool: http://bbs.znpc.net/viewthread.php?tid=5641

Grub and Grub4dos is not the same (don't have the same features).

lstar · **Joined:** Tue Apr 05, 2011 2:20 pm **Posts:** 9

Ah. Thanks for that, I will fire up the editor.

The problem was the iso had a 2 boot files in the root directory. That was causing confusion.

Question:

I know Grub does not support HFS + But I have a small boot CD based on OSX.

[http://refit.sourceforge.net/]

I would like to added it. There must be a way to call it in Grub. Like if I pulled Chain0 from an OSX DVD?

ISO won't start from within Grub menu...

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