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Old 06-01-2007, 10:49 AM   #1
LQ Newbie
Registered: Mar 2007
Location: Manchester
Distribution: Linux Mandriva 2007, Windows XP
Posts: 13

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Exclamation Linux on Dual Machine - Loading

Hi Folks

I have installed Linux on Windows Machine with appropriate partition. So the scenario like ............ I have installed Linux on windows pre installed.

Now I had to format my windows partition for some reason, so I did that with my windows disk and installed on different partition than Linux.

Now the problem I am getting is that I am able to get into Linux OS. Before I used to get option whether to load which OS at the start of my pc but now computer just load windows at default. I reckon that when I installed Windows again, it has overwrite the boot loading setting or something ....

I am not sure of how to deal with this. This is kind of urgent for me folks as I am doing Linux project at college.

Old 06-01-2007, 10:58 AM   #2
Registered: May 2007
Distribution: PCLinuxOS 2007
Posts: 34

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Although I am also a newbie, I have experienced this problem before. When you reinstalled windows, your grub installation which is on the master boot record (mbr) was overwritten. You need to reinstall grub. In my case (mepis 6), I boot with the livecd and from there reinstalled grub. I have also done this in fedora 6. I boot with the first cd and then type ' linux rescue '. I can give you the exact details for fedora 6, but I have seen that you're using mandriva.
Old 06-01-2007, 01:38 PM   #3
Registered: Apr 2006
Location: Quebec, Canada
Distribution: Xubuntu, Zenwalk, Slax, Gentoo
Posts: 39

Rep: Reputation: 16
Brocolli's right, when installing windows it automatically erases the MBR and puts a new one which doesn't point towards grub, leaving you only with windows when booting up

No matter what distro you've got, to fix the problem you're going to need to boot up your computer from a linux livecd. The Madriva CD should do (if you've still got it around) otherwise another Live CD like knoppix will work aswell.

Now, I've never installed Mandriva on my machine, but I have already accidentally screwed up my MBR. So madriva might have a program on their CD that can arrange grub. otherwise, here generic steps to getting grub up and working.

1. Boot up your computer from the live CD and get to a terminal (console) and make sure you have root privileges

2. Find out on what partition linux is residing and it's partition type (if you have no clue the command "parted -l" or "fdisk -l" can help)

3. mount the linux partition if it's not already mounted. to check is it is mounted, type "mount" and look in the list to see if your linux partition shows up.

Ex: fdisk -l showed me that my linux partition is /dev/hda1. So when typing mount I'm looking for :

/dev/hda1 on /mnt/hda1
/dev/hda1 on /media/hda1

If it doesn't show up then it isn't mounted. if it does show up then you can skip to step 5

4. before mounting a partition we need to create a directory as a mount point then mount it like so:

mkdir /mnt/hda1
mount -t filetype /dev/hda1 /mnt/hda1

where filetype is the file type of your partition that you discovered at step 2 (for xeample : xfs or reiserfs are file types)

5. Now we need to mount a proc, bind dev, and chroot to the linux partition.

mount -t proc none /mnt/hda1/proc
mount -o bind /dev /mnt/hda1/dev
chroot /mnt/hda1 /bin/bash

6. If you are sure that your grub is properly set up, then you can go to step 7. otherwise, you can check the configuration using a text editor to open /boot/grub/menu.lst.

Ex: vim /boot/grub/menu.lst
nano /boot/grub/menu.lst

7. type "grub-install /dev/hda", reboot, and it should work !
Old 06-01-2007, 06:49 PM   #4
LQ Newbie
Registered: Mar 2007
Location: Manchester
Distribution: Linux Mandriva 2007, Windows XP
Posts: 13

Original Poster
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Hey mate

This is excellent reply.

Fortunately I have got all 4 CDs of Linux Mandriva 2007 but unformtunately haven't got any Live CD so I have to find a way with installation cds.

If you could kind enough to tell me steps to do with installation cd then it would be great.

Thanks very much.


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