Stupid question (I'm guessing). I'm currently tri-booting (or would like to be) VectorLinux 6 Deluxe, CentOS 5.5 and an evaluation copy of Red Hat 6. I'm using CentOS's grub. VectorLinux and CentOS boot fine, but Red Hat won't load. I think I read somewhere that CentOS's grub is too old for ext3, 256 (something or others).
So, is it possible to download and install a newer version of grub for CentOS 5.5? (This has been a problem with other tri-boot attempts). If not, is their a way to boot Red Hat from the install DVD? Since it's only a 30 day evaluation, booting from DVD or CD would be fine, but I don't see the option.
Thanks for any pointers.
On 03/01/11 07:23, Ron Blizzard wrote:
Stupid question (I'm guessing). I'm currently tri-booting (or would like to be) VectorLinux 6 Deluxe, CentOS 5.5 and an evaluation copy of Red Hat 6. I'm using CentOS's grub. VectorLinux and CentOS boot fine, but Red Hat won't load. I think I read somewhere that CentOS's grub is too old for ext3, 256 (something or others).
So, is it possible to download and install a newer version of grub for CentOS 5.5? (This has been a problem with other tri-boot attempts). If not, is their a way to boot Red Hat from the install DVD? Since it's only a 30 day evaluation, booting from DVD or CD would be fine, but I don't see the option.
Thanks for any pointers.
You don't need to upgrade grub, I'm quite happily dual booting rhel6 GA on a CentOS-5 system (using C-5 GRUB).
Only thing I did differently is the rhel6 /boot partition is mounted on an ext3 partition whereas I _think_ the default might be ext4 which, as a wild guess, is probably unsupported by CentOS-5 GRUB ?
The rest of the system is quite happily sitting in an ext4 partition using md raid on lvm.
On Mon, Jan 3, 2011 at 4:15 AM, Ned Slider ned@unixmail.co.uk wrote:
You don't need to upgrade grub, I'm quite happily dual booting rhel6 GA on a CentOS-5 system (using C-5 GRUB).
Only thing I did differently is the rhel6 /boot partition is mounted on an ext3 partition whereas I _think_ the default might be ext4 which, as a wild guess, is probably unsupported by CentOS-5 GRUB ?
The rest of the system is quite happily sitting in an ext4 partition using md raid on lvm.
Hi Nick,
Thanks for writing back. I'm using ext3 also. Is it possible to see your RHEL 6 grub entry? Did you install grub on the RHEL boot partition and use a chainloader, or were able to just do a normal entry?
Again,t hanks for any ponters.
On 03/01/11 10:37, Ron Blizzard wrote:
On Mon, Jan 3, 2011 at 4:15 AM, Ned Sliderned@unixmail.co.uk wrote:
You don't need to upgrade grub, I'm quite happily dual booting rhel6 GA on a CentOS-5 system (using C-5 GRUB).
Only thing I did differently is the rhel6 /boot partition is mounted on an ext3 partition whereas I _think_ the default might be ext4 which, as a wild guess, is probably unsupported by CentOS-5 GRUB ?
The rest of the system is quite happily sitting in an ext4 partition using md raid on lvm.
Hi Nick,
Thanks for writing back. I'm using ext3 also. Is it possible to see your RHEL 6 grub entry? Did you install grub on the RHEL boot partition and use a chainloader, or were able to just do a normal entry?
Again,t hanks for any ponters.
Yes, I installed rhel6's grub to the rhel6 /boot partition during the rhel6 installation and then added a chainloader entry to the end of the CentOS-5 /boot/grub/grub.conf to boot rhel6:
title RHEL6 Buildsys rootnoverify (hd0) root (hd0,1) chainloader +1
Adjust to suit your partitioning scheme :-)
On Mon, Jan 3, 2011 at 5:09 AM, Ned Slider ned@unixmail.co.uk wrote:
Yes, I installed rhel6's grub to the rhel6 /boot partition during the rhel6 installation and then added a chainloader entry to the end of the CentOS-5 /boot/grub/grub.conf to boot rhel6:
title RHEL6 Buildsys rootnoverify (hd0) root (hd0,1) chainloader +1
Adjust to suit your partitioning scheme :-)
Thanks. I'm guessing that's my problem. Red Hat installed grub to the MBR, then I overwrote it with the CentOS grub. So there's nothing to "chainload" on the partition.
I'll fix it and report back. Again, thanks.
On Mon, Jan 3, 2011 at 5:09 AM, Ned Slider ned@unixmail.co.uk wrote:
Yes, I installed rhel6's grub to the rhel6 /boot partition during the rhel6 installation and then added a chainloader entry to the end of the CentOS-5 /boot/grub/grub.conf to boot rhel6:
title RHEL6 Buildsys rootnoverify (hd0) root (hd0,1) chainloader +1
Adjust to suit your partitioning scheme :-)
That's all it needed. Thanks. Writing from Red Hat now. Would have been here sooner, except SELinux did a "relabel" -- whatever that is. Probably didn't like me messing with grub. I thought I could do a "normal" Linux grub entry (like CentOS) but I got an grub error number 2 when I tried that (13 with the chainloader, which makes sense since I didn't have grub there). I'll use the chainloader from now on when I tri-boot.
Thanks very much.
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On 01/03/2011 06:42 AM, Ron Blizzard wrote:
On Mon, Jan 3, 2011 at 5:09 AM, Ned Slider ned@unixmail.co.uk wrote:
Yes, I installed rhel6's grub to the rhel6 /boot partition during the rhel6 installation and then added a chainloader entry to the end of the CentOS-5 /boot/grub/grub.conf to boot rhel6:
title RHEL6 Buildsys rootnoverify (hd0) root (hd0,1) chainloader +1
Adjust to suit your partitioning scheme :-)
That's all it needed. Thanks. Writing from Red Hat now. Would have been here sooner, except SELinux did a "relabel" -- whatever that is. Probably didn't like me messing with grub. I thought I could do a "normal" Linux grub entry (like CentOS) but I got an grub error number 2 when I tried that (13 with the chainloader, which makes sense since I didn't have grub there). I'll use the chainloader from now on when I tri-boot.
Thanks very much.
If you boot a machine with SELinux disabled and then renenable it, the init scripts will relabel the machine.
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Daniel J Walsh -
Ned Slider -
Ron Blizzard