28 May
2004
28 May
'04
9:11 p.m.
Greetings:
I'm trying to figure out how to write a grub.conf that will allow a
choice between booting into Planet C's RH 8 or RH 9. Here's what I know
about the drive structure:
For RH8:
/dev/hda1 /boot
/dev/hda2 /
/dev/hda3 /swap
For RH9:
/dev/hda5 /boot
/dev/hda6 /
/dev/hda7 /swap
A single drive has been partitioned to accommodate both systems. The
RH8 install was the first installation, and in the process of installing
RH9 grub was rewritten for it (and not for the RH8 partition). So, how
do I indicate the choices ? Here's what I'm thinking about for an edited
grub.conf :
default=0
timeout=10
splashimage=(hd0,4)/grub/splash.xpm.gz
### RH9
title Red Hat Linux (2.4.26-1.ll.rh90.ccrma)
root (hd0,4)
kernel /vmlinuz-2.4.26-1.ll.rh90.ccrma ro root=LABEL=/1 hdc=ide-scsi
initrd /initrd-2.4.26-1.ll.rh90.ccrma.img
### RH8
title Red Hat Linux (2.4.19-1.ll)
root (hd0,0)
kernel /vmlinuz-2.4.19-1.ll ro root=LABEL=/ hdc=ide-scsi
initrd /initrd-2.4.19-1.ll.img
Is this kosher ? What will happen if it's incorrect, and what should I
do if grub fails ? How do I specify that I want RH8 to be the default
system ?
Btw, when the RH8 partition is mounted from RH9 (mount /dev/hda1
/mnt/rh8) we discovered that /mnt/rh8/etc/grub.conf is a broken link.
I'm sorry about the confusion, but I've never edited grub.conf.
Best,
dp
28 May
28 May
9:21 p.m.
New subject: [linux-audio-user] sorry, bad subject line, should have been: Need help with grub
what i get for rushing like a mad fool...
it's been a long day... already...
9:40 p.m.
Hi.
For RH8:
/dev/hda1 /boot
/dev/hda2 /
/dev/hda3 /swap
For RH9:
/dev/hda5 /boot
/dev/hda6 /
/dev/hda7 /swap
Is there any particular reason for so many partitions? Why not one boot
partition, one swap partition and two root partitions? That would be a more
normal way of doing it.
Here's what I'm thinking about for an edited
grub.conf :
default=0
timeout=10
splashimage=(hd0,4)/grub/splash.xpm.gz
### RH9
title Red Hat Linux (2.4.26-1.ll.rh90.ccrma)
root (hd0,4)
kernel /vmlinuz-2.4.26-1.ll.rh90.ccrma ro root=LABEL=/1
hdc=ide-scsi initrd /initrd-2.4.26-1.ll.rh90.ccrma.img
### RH8
title Red Hat Linux (2.4.19-1.ll)
root (hd0,0)
kernel /vmlinuz-2.4.19-1.ll ro root=LABEL=/ hdc=ide-scsi
initrd /initrd-2.4.19-1.ll.img
Is this kosher ?
Sorry, too tired and bleary to look at it properly. Maybe. As I said above I
think you'd be better off with one /boot partition.
What will happen if it's incorrect
I think you should end up with the grub command line, which should allow you
to specify a kernel and boot.
, and what should I
do if grub fails ?
You could boot from a rescue CD (Knoppix or SystemRescueCD should be fine),
mount your partitions, chroot, edit your config files and try again (either
with grub or lilo).
How do I specify that I want RH8 to be the default
system ?
Change 'default=0' to 'default=1'.
HTH, good luck.
10:07 p.m.
New subject: [linux-audio-user] configuring grub
Joe Button wrote:
Well, I didn't set up this system, and I'm trying to configure the grub
loader for it from a distance of a few hundred kilometers. The guys who
did set it up didn't configure the networking (they'll have DSL next
week so they decided to wait) so we're doing this all over the land
lines. Yep, kinda weird...
I see your point, it would be better to do that, wouldn't it ? Can we
simply copy the contents of one boot partition to the other, or is that
just too simple a solution to be workable ?
Thanks for the advice, Joe, it is most helpful and much appreciated.
Best regards,
dp
For RH8:
/dev/hda1 /boot
/dev/hda2 /
/dev/hda3 /swap
For RH9:
/dev/hda5 /boot
/dev/hda6 /
/dev/hda7 /swap
Is there any particular reason for so many partitions? Why not one boot
partition, one swap partition and two root partitions? That would be a more
normal way of doing it.
Here's what
I'm thinking about for an edited
grub.conf :
default=0
timeout=10
splashimage=(hd0,4)/grub/splash.xpm.gz
### RH9
title Red Hat Linux (2.4.26-1.ll.rh90.ccrma)
root (hd0,4)
kernel /vmlinuz-2.4.26-1.ll.rh90.ccrma ro root=LABEL=/1
hdc=ide-scsi initrd /initrd-2.4.26-1.ll.rh90.ccrma.img
### RH8
title Red Hat Linux (2.4.19-1.ll)
root (hd0,0)
kernel /vmlinuz-2.4.19-1.ll ro root=LABEL=/ hdc=ide-scsi
initrd /initrd-2.4.19-1.ll.img
Is this kosher ?
Sorry, too tired and bleary to look at it properly. Maybe. As I said above I
think you'd be better off with one /boot partition.
29 May
29 May
2:58 a.m.
New subject: [linux-audio-user] configuring grub
Dave Phillips wrote:
I see your point, it would be better to do that,
wouldn't it ? Can we
simply copy the contents of one boot partition to the other, or is that
just too simple a solution to be workable ?
I think so, but you should do it from a repair cd, to avoid messing with
the running system.
For example, I had a problem with my /usr partition, which was too
small, so I shrinked my windows partition, created a new partition for
/usr/share, and simply copied the content of /usr/share to the new
partition from a install Debian CD (any install Cd which give you a
shell works, I presume)
Just edited my fstab, worked without problem. I don't see why /boot
would be different in that case.
david
7:04 a.m.
New subject: [linux-audio-user] configuring grub
Hi.
Can we
simply copy the contents of one boot partition to the other, or is that
just too simple a solution to be workable ?
You should just need the vmlinuz and initrd files, anything else is optional.
Of course you'll need to edit your grub.conf to take account of where
everything is.
I think you should be OK doing all this from a running system. The only gotcha
is you should make sure the (correct) boot partition is mounted when you're
setting up grub or you can get mightily confused. Happened to me the other
day.
Thanks for the advice, Joe, it is most helpful and
much appreciated.
No problem, hope you get it all working.
28 May
28 May
10:51 p.m.
A single drive has been partitioned to accommodate
both systems. The
RH8 install was the first installation, and in the process of installing
RH9 grub was rewritten for it (and not for the RH8 partition). So, how
do I indicate the choices ? Here's what I'm thinking about for an edited
grub.conf :
default=0
timeout=10
splashimage=(hd0,4)/grub/splash.xpm.gz
### RH9
title Red Hat Linux (2.4.26-1.ll.rh90.ccrma)
root (hd0,4)
kernel /vmlinuz-2.4.26-1.ll.rh90.ccrma ro root=LABEL=/1 hdc=ide-scsi
initrd /initrd-2.4.26-1.ll.rh90.ccrma.img
### RH8
title Red Hat Linux (2.4.19-1.ll)
root (hd0,0)
kernel /vmlinuz-2.4.19-1.ll ro root=LABEL=/ hdc=ide-scsi
initrd /initrd-2.4.19-1.ll.img
Is this kosher ?
It looks good to me given the partition map. But I'm not a grub expert
either...
What will happen if it's incorrect,
As long as you have not touched the rh9 boot line the worst, I guess, is
that you won't be able to boot into 8.0.
and what should I
do if grub fails ? How do I specify that I want RH8 to be the default
system ?
If you get to the point of being able to boot 8 then changing the line:
default=0
to
default=1
should do the trick and the system should boot into 8 after the grub
timeout...
I guess you are editing the grub.conf that is in the /boot partition for
redhat 9, right? (/boot/grub/grub.conf, the last /boot partition
installed).
-- Fernando
29 May
29 May
6:54 a.m.
New subject: [linux-audio-user] Re: alsa-lib 1.04 FC1
Dave Phillips <dlphilp(a)bright.net> writes:
I'm trying to figure out how to write a
grub.conf that will allow a
choice between booting into Planet C's RH 8 or RH 9.
I'm not a grub expert, so I hope I don't spread misinformation...
First of all make sure you do edit the right grub.conf.
Here's what I know about the drive structure:
For RH8:
/dev/hda1 /boot
/dev/hda2 /
/dev/hda3 /swap
For RH9:
/dev/hda5 /boot
/dev/hda6 /
/dev/hda7 /swap
So, how do I indicate the choices ? Here's what I'm
thinking about for an edited grub.conf :
default=0
timeout=10
splashimage=(hd0,4)/grub/splash.xpm.gz
### RH9
title Red Hat Linux (2.4.26-1.ll.rh90.ccrma)
kernel (hd0,4)/vmlinuz-2.4.26-1.ll.rh90.ccrma ro root=LABEL=/1 hdc=ide-scsi
initrd /initrd-2.4.26-1.ll.rh90.ccrma.img
I do not understand your 'root=LABEL=/1' I would have tried it like this:
title Red Hat Linux (2.4.26-1.ll.rh90.ccrma)
kernel (hd0,4)/vmlinuz-2.4.26-1.ll.rh90.ccrma root=/dev/hda6
initrd (hd0,4)/initrd-2.4.26-1.ll.rh90.ccrma.img
This assumes that vmlinuz and initrd are on /dev/hda5.
Btw, when the RH8 partition is mounted from RH9 (mount
/dev/hda1
/mnt/rh8) we discovered that /mnt/rh8/etc/grub.conf is a broken link.
I don't think that you really want 'mount /dev/hda1 /mnt/rh8' as your
RH8 is not on /dev/hda1 but /dev/hda2. So you did mount '/boot' on
/mnt/rh8 which has no '/etc' directory...
BTW If you'd mount /dev/hda2 on /mnt/rh8 it's /boot wouldn't be mounted
either, as you have it on a separate partition.
BTW You could use the same swap partition for both systems.
HTH,
Robert Epprecht
31 May
31 May
2:37 p.m.
New subject: [linux-audio-user] grub config update
Greetings:
Thank you to everyone who responded to my original query about
configuring grub for a dual-boot system. It looks as if my suggested
config will work, we'll test it tomorrow evening. Listen for the howls... ;)
Best regards,
dp
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linux-audio-user@lists.linuxaudio.org
8 comments
5 participants
participants (5)
-
Cournapeau David -
Dave Phillips -
Fernando Pablo Lopez-Lezcano -
Joe Button -
Robert Epprecht