Re: Please help with following situation

[Goh Lip]

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)
> makeactive
> chainloader +1
> }
> EOF
>
> 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
> }

to

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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