Change in GRUB menu.lst does not take effect

I'm working on a system (Ubuntu 9.04) which has RAID 10 on 6x1TB disks. Over this there is a LVM setup. I needed to install a new kernel on this system and everything went smoothly. I updated the /boot/grub/menu.lst file to boot with the new kernel.

However, while booting, the newly installed kernel is not seen in the list and the system still boots with the old kernel.

I re-checked the installation logs of the new kernel and there were no errors. I ran 'update-grub' and it selects all the kernels available in /boot. However, when I run 'grub-install' it throws the following error:
/dev/mapper/vg-root does not have any corresponding BIOS drive.

I tried to do this from the grub command line:

grub> find /grub/stage1
find /grub/stage1
grub> find /grub/stage2
find /grub/stage2
grub> find /grub/menu.lst
find /grub/menu.lst
grub> root (hd0,0)
root (hd0,0)
grub> setup (hd0)
setup (hd0)
Checking if "/boot/grub/stage1" exists... no
Checking if "/grub/stage1" exists... yes
Checking if "/grub/stage2" exists... yes
Checking if "/grub/e2fs_stage1_5" exists... yes
Running "embed /grub/e2fs_stage1_5 (hd0)"... failed (this is not fatal)
Running "embed /grub/e2fs_stage1_5 (hd0,0)"... failed (this is not fatal)
Running "install /grub/stage1 (hd0) /grub/stage2 p /grub/menu.lst "... succeeded
grub> quit

However, it still doesn't work. The groot in menu.lst is shown as "groot=(hd0,0)" (used by update-grub) and the /boot is on LVM:

df /boot
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/vg-root 19223252 1140336 17106432 7% /

.. and the file looks like:

(fd0) /dev/fd0
(hd0) /dev/sda

I'm running out of ideas. Any help on this will be highly appreciated.


Geek Guide
The DevOps Toolbox

Tools and Technologies for Scale and Reliability
by Linux Journal Editor Bill Childers

Get your free copy today

Sponsored by IBM

Upcoming Webinar
8 Signs You're Beyond Cron

Scheduling Crontabs With an Enterprise Scheduler
11am CDT, April 29th
Moderated by Linux Journal Contributor Mike Diehl

Sign up now

Sponsored by Skybot