Dual Disk Dual Boot Issue Correction

Requirements

You will need one of the following disks to perform this solution:

1. Fedora Installation CD #1
2. Fedora Rescue CD
3. Fedora DVD
4. Fedora Live (LiveCD or LiveUSB)
   

Doing the work

1. Only follow this Step 1 if using Fedora Live media, otherwise, skip to the next step for regular rescue mode. When using Fedora Live media, you have to manually find and mount your correct fedora device(s) (which rescue mode does for you), then bind mount a few system devices, and then chroot.
   
   1. Make a mountpoint to chroot into later with "mkdir /mnt/sysimage"
   2. Determine which device your fedora root ('/') filesystem lives on. It may be a regular /dev/sda# partition, or, if it was a default install, it will be a Logical Volume (run "vgchange -ay" to activate all LVs). Mount it at /mnt/sysimage. i.e.: "mount /dev/mapper/vg-myhostname-lv_root /mnt/sysimage" and ls /mnt/sysimage to verify contents.
   3. Determine which device your fedora boot ('/boot') filesystem lives on. It is always a regular partition, but not always the first one, and is a few hundred megs in size. Since root is mounted (above), you can do "grep boot /mnt/sysimage/etc/fstab" to determine the boot device. If it shows a UUID instead of a /dev/sda# device, then mount it as such. i.e.: "mount -U deadbeef-cafe-1234-abcd-123456789012 /mnt/sysimage/boot"
   4. Now it is necessary to bind mount a few system devices
      

      mount --bind /dev /mnt/sysimage/dev
      mount --bind /proc /mnt/sysimage/proc
      mount --bind /sys /mnt/sysimage/sys
      

   5. Skip to Step 9
2. Insert either the Fedora Installation CD 1, the Fedora Rescue CD, or the Fedora DVD then reboot the computer. At the Menu Options screen press the 'esc' key.

3. At the prompt enter the following:

   linux rescue
   

4. Press "enter", at the "Choose a Language Screen" select your language using the up/down arrow keys, then tab to "ok" and press the enter key.

5. At the "Keyboard Type Screen" select your keyboard type using the up/down arrow keys, then tab to "ok" and press the enter key.

6. At the "Setup Network Screen" tab to "no" then press enter.

7. At the "Rescue Screen" tab to "continue" then press enter.

8. At the second "Rescue Screen" press enter to continue.

9. At the prompt enter the following:

   chroot /mnt/sysimage/ 
   

10. Press "enter", then enter the following:

    grub-install --recheck /dev/sda 
    

11. This solution assumes that Windows is installed on SDA (first hard disk drive), and Fedora Core is Installed on SDB (second hard disk drive).

12. Press "enter", then enter the following:

    exit
    

13. Press "enter", then enter the following:

    exit
    

14. Press "enter", at this point, your system should reboot. As it does remove the CD-Rom so the system does not boot off of the CD.

More Information

Disclaimer

Added Reading

• http://www.gnu.org/software/grub/manual/html_node/Invoking-grub-install.html