Dual booting prob. with Grub and hd0, hd1, hd2

[wikidude]

Hi !

Can someone help me with this question.

I have a PC with a hd0 (WinXp) and hd1 (Fedora).
Dual dooting works like a charm.

But. Now i want to switch OS dist. (From Fedora --> RHEL).
For some days i will have access to the both systems to be ensured that i donīt miss anything from my old system.
To be shure that the installer/or I, donīt will mess things up in my system, i disconnected hd0, and hd1. Then i installed my RedHat, with success (on hd2).

When i plugged in my previous discs and changed the grub.conf (se below), everything works at the start.....but then the systems says that itīs write-protected etc. It seems to me that there is some form of conflic.

When i plug-out my new RHEL disc then i can start fedora, and
when i plug-out my fedora & xp disc my new RHEL will start correctly.
But when all my 3 discs are plugged in, i canīt start non of them.

Is there some "root" flag that i will have to change or is there a conflict with MBR ?


default=0
timeout=30
splashimage=(hd1,0)/grub/splash.xpm.gz
title Fedora Core (2.4.22-1.2115.nptlsmp)
root (hd1,0)
kernel /vmlinuz-2.4.22-1.2115.nptlsmp ro root=LABEL=/ rhgb
initrd /initrd-2.4.22-1.2115.nptlsmp.img
title Fedora Core-up (2.4.22-1.2115.nptl)
root (hd1,0)
kernel /vmlinuz-2.4.22-1.2115.nptl ro root=LABEL=/ rhgb
initrd /initrd-2.4.22-1.2115.nptl.img
title Win-XP
rootnoverify (hd0,0)
chainloader +1
title RedHat ES 3 (2.4.21-32.0.1.EL)
root (hd2,0)
kernel /vmlinuz-2.4.21-32.0.1.EL ro root=LABEL=/
initrd /initrd-2.4.21-32.0.1.EL.img


best regrds.


WikiDude.

[dylunio]

Looking at your grub.conf file, I see you have set the RedHat ES 3 lable as root=LABEL=/ , you might want to change that to root=/dev/hdc1 (or whatever drive/partition the new RH is on.

[wikidude]

Yes, youīre right.

I also noticed that just after sending my posting, but....it doesenīt work after this changes.

/WikiDude

Looking at your grub.conf file, I see you have set the RedHat ES 3 lable as root=LABEL=/ , you might want to change that to root=/dev/hdc1 (or whatever drive/partition the new RH is on.

[dylunio]

Hmm, it seems that Fedora mods it's grub a little, have you tried root=LABEL/3 or root=LABEL/dev/hdc1 ?

[Flatline]

The root=LABEL=/ is standard for Fedora grub, so I wouldn't worry about that. Could you post the output from

df hT

just so we can verify that the partitions in your grub.conf are correct?

[wikidude]

This is the output from df -hT


==Fedora Machine==
Filsystem Typ Storlek Anvnt Tillg Anv% Monterat pÃĨ
/dev/hdb2 ext3 84G 40G 40G 50% /
/dev/hdb1 ext3 99M 8,5M 86M 10% /boot
none tmpfs 248M 0 248M 0% /dev/shm
/dev/hdb3 ext3 29G 2,3G 26G 9% /usr


==RedHat machine==

Filsystem Typ Storlek Anvnt Tillg Anv% Monterat pÃĨ
/dev/hdc6 ext3 35G 2.5G 31G 8% /
/dev/hdc1 ext3 198M 26M 163M 14% /boot
/dev/hdc2 ext3 97G 466M 91G 1% /home
none tmpfs 247M 0 247M 0% /dev/shm
/dev/hdc3 ext3 20G 94M 19G 1% /var

[dylunio]

Does it work if you set root=LABEL/dev/hdc6 ?

[wikidude]

Noope !

Result:
Kernel panic No init found

Does it work if you set root=LABEL/dev/hdc6 ?

My new grub.conf:

default=0
timeout=30
splashimage=(hd1,0)/grub/splash.xpm.gz
title Fedora Core (2.4.22-1.2115.nptlsmp)
root (hd1,0)
kernel /vmlinuz-2.4.22-1.2115.nptlsmp ro root=LABEL=/ rhgb
initrd /initrd-2.4.22-1.2115.nptlsmp.img
title Fedora Core-up (2.4.22-1.2115.nptl)
root (hd1,0)
kernel /vmlinuz-2.4.22-1.2115.nptl ro root/dev/hdb1
initrd /initrd-2.4.22-1.2115.nptl.img
title Win-XP
rootnoverify (hd0,0)
chainloader +1
title RedHat ES 3 (2.4.21-32.0.1.EL)
root (hd2,0)
kernel /vmlinuz-2.4.21-32.0.1.EL ro root=LABEL/dev/hdc6
initrd /initrd-2.4.21-32.0.1.EL.img

[dylunio]

What happens when you set the RH entery as:

title RedHat ES 3 (2.4.21-32.0.1.EL)
root (hd2,0)
kernel /vmlinuz-2.4.21-32.0.1.EL root=LABEL/
initrd /initrd-2.4.21-32.0.1.EL.img

?

notice there is no ro in the line.

[wikidude]

Did like you said (whithout "no" and root=LABEL/) with no success.

->

System starts....but after som 10 sec:

Mount root filesystem
mount error 6 mounting ext3
....
kernel panic. No init found. Try passing init= option to kernel

So no big difference.

What happens when you set the RH entery as:

title RedHat ES 3 (2.4.21-32.0.1.EL)
root (hd2,0)
kernel /vmlinuz-2.4.21-32.0.1.EL root=LABEL/
initrd /initrd-2.4.21-32.0.1.EL.img

?

notice there is no ro in the line.

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