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> grub4dos error 30: disk read error
jaclaz
post Oct 15 2007, 05:31 PM
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@ktp
Take it easy, man. (IMG:../forums/style_emoticons/default/smile.gif)

ISOEMU is, as you found out in the meantime, completely unrelated to ISOLINUX, part of syslinux together with memdisk.

I don't know where you got the info that you can boot "anything" with isoemu, as said (even in it's docs):
http://www.911cd.net/forums//index.php?showtopic=8955
QUOTE
Known Limitation
=================

* Support FAT32 partition only;

* Works on x86's RealMode only(so this cannot boot Windows PE,
OR, WinNT based OS), `cause it hooks INT13h;

* Support 8.3 file format only;

it cannot boot any NT based system, not because of a limit of isoemu, but because of the way NT systems boot, needing hooking to a driver.

About the Chinese student, and it's article, with no offence intended to Chinese or to students in general, I find that article pretty much unorganized and chaotic, being a computer tech one.

You might notice that the author mixes without referencing them, different "versions" of grub, together with ieldr, then it "mixes" what he "thinks that would work" with what actually was tested.

If you read attentively this page:
http://www.supinfo-projects.com/fr/2005/vd_boot_multi_os/5/
after having proposed a "5.1 My solution 1", which includes this (NOT WORKING) entry:
QUOTE
title boot from bootable iso file
run /dev/hda1/winxp.iso

a few lines below he introduces his "5.2 MY solution 2" with this statement:

QUOTE
Because the "run" command is not surported by the version of my grub in my usb_hdd ,so we I work out the second solution for my usb-hdd.

(IMG:../forums/style_emoticons/default/w00t.gif)
and his "solution 2" entries DO NOT include the entry for booting from .iso, but rather booting to DOS and use SHSUCDX to access (NOT boot) a XP .iso.

jaclaz
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ktp
post Oct 15 2007, 06:10 PM
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@jaclaz
You are right about NT/XP. For other non-NT system, I tested isoemu from my internal HDD (so real hardware, real BIOS) and
it works! ISO tested:
- UBCD (ubcd411.iso), Puppy Linux 3.0 (puppy.iso), VistePE.iso, Acronis Disk director 10.iso
For NT-like iso, it hangs, no message issued.
I will test some more ISO (Knoppix, DOS iso).
Edit: it fails with Knoppix iso or Damn Small Linux iso (logo seen, initrd loaded but then black screen). memtest.iso got
error message: cannot find CD loader or not bootable CD (although this CD is bootable for me).

The problem is now why isoemu does not work on my USB key (FAT32).
The article that apparently mention (wrongly) that it works also with WinPE is here (andreivc's post):
http://www.forumpcs.com.br/viewtopic.php?t...7&view=next
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jaclaz
post Oct 15 2007, 07:58 PM
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QUOTE(ktp @ Oct 15 2007, 08:10 PM) *
The article that apparently mention (wrongly) that it works also with WinPE is here (andreivc's post):
http://www.forumpcs.com.br/viewtopic.php?t...7&view=next


Well, actually andreivc bears no responsability (IMG:../forums/style_emoticons/default/smile.gif) , as I see it, he just quoted this thread here:
http://forums.gentoo.org/viewtopic-t-567485.html

On the Gentoo forum where a new user at his first post proposes to change the way Gentoo should be installed (IMG:../forums/style_emoticons/default/w00t.gif)

Followed by the "usual" spam by forkart and by a "noob" user Rozal that reports that ISOEMU does not work for a XP .iso, vainly helped by a "l33t" one, shaumux that concludes with this:
QUOTE
First as you are trying to boot a windows disk you were supposed to post the problem in off the wall section.

Secondly Windows doesn't support creating live cds except through specialized software like BART PE

(IMG:../forums/style_emoticons/default/rolleyes.gif)

jaclaz
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tinybit
post Oct 16 2007, 02:52 PM
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ktp:

try the test build 2007-10-16 at http://grub4dos.jot.com/

and see if solved.

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ktp
post Oct 16 2007, 03:58 PM
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QUOTE(tinybit @ Oct 16 2007, 04:52 PM) *
ktp:

try the test build 2007-10-16 at http://grub4dos.jot.com/

and see if solved.


I tried it and still got the same error as before with the same entry in menu.lst.
Error loading operating system.

CODE
title ERDC (hard disk image)
find --set-root /erdc2005.img
map /erdc2005.img (hd0)
chainloader   --load-length=512   /erdc2005.img
rootnoverify (hd0)


If I suppress the --load-length parameter, the USB LED shows some activity, then the PC hangs, no more message.
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tinybit
post Yesterday, 04:24 AM
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I need some more info to locate the problem. please do the following test:

for your real unemulated drive (hd0), which is your USB drive, type these commands:
CODE
geometry (hd0)
blocklist (hd0,0)/erdc2005.img

and post the output messages.

PS: Just uploaded a new build 2007-10-17.
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ktp
post Yesterday, 09:41 AM
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@tinybit
Tested with build 2007-10-17.
Following are the requested information.

CODE
geometry (hd0)
drive 0x80(LBA): C/H/S=251/255/63, Sector Count/Size=4032315/512
   Partition num: 0, Filesystem type is fat, partition type 0xe

blocklist (hd0,0)/erdc2005.img
(hd0,0)2693136+353430
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