How to change bootloader

[rozner]

Hello,

I have two installs on the same drive but different partitions. First I installed XBMC live which is based on Ubuntu (I don't know the exact verion but I think it's in the 9.x).

Then I installed full Ubuntu 10.04 on another partition.

Now it uses grub2 off the second partition. I configured it to boot XBMC as default and I've had no issues with it. However in the end I rarely use Ubuntu since this is really HTPC. I thought maybe it would be cool to check emails and do some web browsing on my TV, but it turns out I prefer just using a regular computer for that. So I want to delete the partition, but I'm worried doing so will make the system not boot anymore unless if I reinstall XBMC live, I don't want to do that either since I've got it configured all properly and I don't want to mess that up.

So I believe I have to change the MBR to point to the XBMC partition although I haven't quite figured out how to do that.

Thanks for any help with this.

[VMC]

Do you know the partition# of the XBMC? You can boot up then edit the grub menu of the XBMC to find it, then do the following from a livecd.


sudo mount /dev/sdXY /mnt
sudo grub-install --root-directory=/mnt/ /dev/sda

XY = partition# of XBMC

[ronparent]

You just need decide which grub you want to use and reinstall it to the partition you are retaining. If you want to retain grub 2 just load the live cd containing it and reinstall according to this (if grub 2): https://help.ubuntu.com/community/Grub2#Reinstalling GRUB 2
The reinstallation should find the XBMC partition automatically when the boot menu is generated. You will have to identify it fir the install.