Mandriva added to my hard drive.

With the chainloading system set up, adding Mandriva became a easy & happy job. I installed it on hda6.So,to chainlaod it ,I chose to boot on hda6 when asked by installation progress. Reboot.The the new system won't appear on the boot menu.Boot the previous system.Edit the menu.list of the master GRUB,which is independent from any OS.Add

title Mandriva Linux root (hd0,5) chainloader +1

Reboot again,Mandriva Linux appears on boot menu.Installation finished.

Creating An Independent Grub Without Losing Original Linux

Inspired by this essay,I decided to rearrange the partition on my laptop so that I would be able to install new OSs and chainload them easily.But the MBR is already occupied by Ubuntu,which means that there's not a boot loader in its own partition's boot sector. It is not chainloadable! With help from justlinux.com I finally figured out the way to make the partition chainloadable and chainloaded it by a independent GRUB newly installed on its own partition. My whole Ubuntu is installed on sda3, and I assigned 300MB as sda1 for the independent GRUB.Here comes what I did: On Ubuntu 7.10:

$ sudo mount -t ext3 /dev/sda1 /media/sda1 $ sudo mkdir /media/sda1/boot $ sudo mkdir /media/sda1/boot/sda1 $ cp /boot/grub/* /media/sda1/boot/grub

make /media/boot/grub/menu.lst like this:

defaulte 0 title Ubuntu Linux root (hd0,2) chainloader +1

Reboot the system,press "c" when GRUB appears.

Grub> root (hd0,0) Grub> setup (hd0) Grub> reboot

Again,You will find that the menu becomes the new one when GRUB appears,press "c"

Grub> root (hd0,2) Grub> setup(hd0) Grub> chanloader +1 Grub> boot

This time the GRUB menu on sda3 will appear.Which means that Ubuntu is chainloaded by the independent GRUB on sda1.And we needn't do any thing next time. Next time A new Linux being installed,just make sure it won't take over MBR, and add this to menu.lst on sda1:

title Name of new OS root (hdi,j) chainloader +1

(hdi,j) stands for the partition of the new system.