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Booting Windows from a separate Hard drive

From: Stefan Misch
Subject: Booting Windows from a separate Hard drive
Date: Mon, 12 May 2008 20:19:59 +0200
User-agent: Thunderbird (X11/20080505)


I have a problem configuring Grub to Boot Windows XP Pro from another hard drive than what Grub is located on. The problem is that grub keeps booting the wrong windows installation that is on the same hard disc as grub.

From what I understand the options

rootnoverify (hd1,0)
chainloader +1

should suffice to get XP booted but it doesn't work. I don't know why but it keeps booting the wrong hard disc (another win2k installation).

My Google-Fu is failing me to get around my problem which is why I'm posting it here.


Here's my setup:
2 Discs connected via S-ATA


sda1    Win2k
sda2    Swap
sda3    Linux (Ubuntu 8.04)
sda4    /home

sdb1    WinXP pro
sdb2    Fat32 - data
sdb3    ext3 data

Grub was installed along with Ubuntu after Win2k was installed. The auto recognition worked flawlessly and I have the grub menu option to boot it along with Ubuntu.

Later (yesterday) I installed XP on the second hard drive.* Now I want to add XP in the menu so I added the following lines to /boot/grub/menu.lst

title           Microsoft Windows XP Professional
root    (hd1,0)
chainloader     +1

This is basically the same entry as the above autogenerated entry for Windows 2000. I only changed "(hd0,0)" to "(hd1,0)".

But ... it loads Win2000. I checked the boot.ini-files for both installations to make sure that I haven't accidently told the XP bootloader to load the wrong windows. Now I have a boot menu in both boot loaders. I can still boot XP by telling the BIOS to do so and it shows the menu.

I also checked the grub command line at boot time. Typing "root (hd" and then the Tab-key shows that grub detects both discs and also all partitions. Even when I enter the commands in the menu line (see at the beginning) it does boot hd0,0 :-(

Am I doing something wrong? Did I encounter a bug? Is there a way to tell stage 2 to be more verbose before doing something?

Oh, and before I forget, my grub version is: "grub (GNU GRUB 0.97)".

All best,

*)I don't know if this matters but I resized the Fat partition and created an extra partition at the beginning. Before the XP installation Linux handled the XP partition as sdb3 even though it was physically the first. This changed when XP was installed. I assume this happened at the time it wrote the new MBR.

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