Install grub legacy to replace grub2 on Ubuntu 11.04

[Tom H]

On Tuesday, May 3, 2011, Ryan Chan <ryanchan404 at gmail.com> wrote:
>
> For some reason, I need to use grub instead of grub2, when I finished
> the following, the Ubuntu 11.04 failed to boot, anyone mind telling
> what wrong with my steps?
>
> 1. Ubuntu 8.10, using grub legacy
> 2. Ubuntu 11.04, using grub2
>
> Steps:
>
> 1. Shutdown the 11.04 VM, mount the Ubuntu 11.04's disk inside Ubuntu
> 8.10. as device /dev/sdb1, mount point is /mnt/test
> 2. Run the command: sudo grub-install --root-directory=/mnt/test /dev/sdb
> 3. Umount the 11.04's disk and boot up the Ubuntu 11.04 with the new grub
> 4. The machine failed to boot with no error.

Does /boot have an ext4 filesystem?