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Re: Please help with following situation

From: Goh Lip
Subject: Re: Please help with following situation
Date: Sat, 20 Nov 2010 23:01:25 +0800
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20101027 Thunderbird/3.1.6

On Saturday 20,November,2010 05:01 AM, Steve Cohen wrote:
I am trying to develop an installer package for a specialized
application that runs on MS-DOS (Actually Windows 95 without the GUI).

To this end, I am using a machine that has been preloaded with Ubuntu
Linux 10.04 (uses grub 2). This machine has both a floppy and a CDROM.

When booted with a special MS-DOS floppy and a special CDROM in the
drive, it copies the system from the floppy drive (A:) to drive (C:).

"Drive C:" is a partition of the only hard drive on the system -
/dev/sda3 in linux terms. This partition was carved out by GParted
and formatted using DOS Format command from the system booted from the
floppy in drive A:

The test of all this, is that when the floppy is not present in the
drive and the system is booted, MSDOS should boot from "Drive C:"

Of course, since this is a dual boot system, this must be reflected in
GRUB. I have created the following file: /etc/grub.d//11_msdos. Its
contents are as follows:

#!/bin/sh -e
echo "Adding MS-DOS"
cat << EOF
menuentry "MS-DOS" {
set root=(hd0,3)
chainloader +1

I run update-grub and this gets written into /boot/grub/grub.cfg.

When I reboot the machine (floppy drive not loaded, of course) the grub
menu appears. But when I select MS-DOS, I see the
"Invalid System Disk" error and the system won't load.

Can someone help me understand why not?

Steve, that's a real unusual situation (for me) so not too sure if this would work but no harm trying, right?

Try modifying the above from

> menuentry "MS-DOS" {
> set root=(hd0,3)
> makeactive
> chainloader +1
> }


menuentry "MS-DOS" {
insmod ntfs
set root=(hd0,3)
drivemap -s (hd0) (hd0,3)
chainloader +1

If doesn't work, go to grub prompt (press 'c' at grub menu),
and type ls (hd0,3) to confirm correct partition being addressed.
If not, press "ls" to see what the correct (hdx,y) should be.

Good luck _ Goh Lip
ps: asuume ntfs

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