I have Fedora Core installed on hda and it has been working great. I have also installed Mandrake 10 on a second hard drive hdd, and it overwrote my mbr and Fedora diasppeared. So I reinstalled Fedora, and would like to know what to put in grub so that I can boot the already installed Mandrake too. I suppose that I should not need to reinstall it since the only thing missing is the few lines in the grub file.

I have the hard drive for Mandrake as (hd1,0) but it can't find the Mandrake kernel. If I use (hd3,0), grub won't find the drive. Mandrake is on the first partition of hdd. A sample few lines from the grub file of a Mandrake 10 boot should be all I need to get this up and running.

Thanks to anyone who has time to respond.

Look in your Mandrake partition for it's /etc/grub.conf (if it's using grub). If it's using lilo, look in the Mandrake's /etc/lilo.conf.
Use 'fdisk -l' tp list partitions. Mount your MDK parititon to access it:
mkdir /mnt/mdk
mount /dev/hdd[number you figure out from fdisk -l] /mnt/mdk

Thanks for the response, and I can already mount the Mandrake partition as you indicated. So if I look in /etc/grub.conf should I find the parameters that need to be installed in the grub file that is on my primary boot drive.

I tried the same wording as Fedora uses in grub, substituting hd1,0 for hd0,0 and changing kernel reference to mandrake and initrd to point to Mandrake, but the grub file cannot find the proper files. There are three lines in the grub file that will boot Mandrake and they would be:

line 1 reference to hd1,0

line 2 kernel reference

line 3 initrd reference to mdk

I really just need to know what lines 2 and 3 actually look like, so I can reference the correct files. I am not at work now, so cannot verify /etc/grub.conf.