Dual boot with win 2nd hd
 

It worked for me check it out........

# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd0,0)
# kernel /vmlinuz-version ro root=/dev/hda2
# initrd /initrd-version.img
#boot=/dev/hda
default=1
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
title windows XP
root (hd1,0)
makeactive
chainloader +1
map (hd0) (hd1)

map (hd1) (hd0)

title Red Hat Linux
root (hd0,0)
kernel /vmlinuz-2.4.20-18.9 ro root=LABEL=/ hdd=ide-scsi
initrd /initrd-2.4.20-18.9.img

I'm having trouble doing something similar to you - I think. I tried bits of your example with no luck.

I have three hard drives, hda is Win XP, was installed first, worked fine, hdb is NTFS but not used, hdc is Red Hat 9.

Boot fails. If I use emergency boot floopy, Linux comes up fine.

I have tried reinstalling GRUB to hda MBR and forcing BIOS to boot from hda (with GRUB conf on hdc) and I have tried installing GRUB on hdc and forcing BIOS to boot from hdc. Neither way works.

To be specific, boot starts, I get a GRUB loading 1.5 message, then GRUB loading, please wait (which I presume is stage 2) and then I get an Error 21 - which is unknown boot error or something really, really helpful :-)

I don't understand, nor can I find any info on, why multiple hd seems to be a problem. I've tried it before an always given up.

Cheers.

JGV