So here's the thing. I have two partition in my netbook (plus swap):
/dev/sda4 with Ubuntu 10.4
/dev/sda5 with Centos 5.5
I use Ubuntu obviously. Centos is there because I need to run some test on that distro. The problem is Centos uses Grub and Ubuntu uses Grub2.
This is /boot/grub/menu.lst from Centos:
default=0
timeout=5
splashimage=(hd0,4)/boot/grub/splash.xpm.gz
title CentOS (2.6.18-194.17.4.el5xen)
root (hd0,4)
kernel /boot/xen.gz-2.6.18-194.17.4.el5
module /boot/vmlinuz-2.6.18-194.17.4.el5xen ro root=LABEL=/1 rhgb quiet
module /boot/initrd-2.6.18-194.17.4.el5xen.img
title CentOS (2.6.18-194.el5xen)
root (hd0,4)
kernel /boot/xen.gz-2.6.18-194.el5
module /boot/vmlinuz-2.6.18-194.el5xen ro root=LABEL=/1 rhgb quiet
module /boot/initrd-2.6.18-194.el5xen.img
The /boot/grub/grub.cfg from Ubuntu:
menuentry "CentOS release 5.5 (Final) (on /dev/sda5)" {
insmod ext2
set root='(hd0,5)'
search --no-floppy --fs-uuid --set 66daaf1a-53b0-4e12-96f3-db01d52e12d1
linux /boot/vmlinuz-2.6.18-194.17.4.el5xen root=/dev/sda5
}
menuentry "CentOS release 5.5 (Final) (on /dev/sda5)" {
insmod ext2
set root='(hd0,5)'
search --no-floppy --fs-uuid --set 66daaf1a-53b0-4e12-96f3-db01d52e12d1
linux /boot/vmlinuz-2.6.18-194.el5xen root=/dev/sda5
}
This was generated running update-grub2 and grub-install under Ubuntu.
It's not working. It gives me something like bad magic number.
How can I convert the grub1 entry in a grub2 shape?
2 Answers
Ok so since I was unable to find specific information on a proper conversion of grub1 for Centos5.5 that's what I did.
menuentry "CentOS release 5.5 (Final) (on /dev/sda5)" {
insmod ext2
set root='(hd0,5)'
search --no-floppy --fs-uuid --set 66daaf1a-53b0-4e12-96f3-db01d52e12d1
drivemap -s (hd0) ${root}
chainloader +1
}
Basically I chainloaded grub1 loader inside grub2 loader.
in this forum there are all information you need to know about grub
