Grub not booting, lilo works...Help needed...

[Brice Figureau]

I have a supermicro server running debian Etch, which was booting fine 
for almost 3 years under lilo.
/boot is a software RAID 1 partition. 
Root is also a software RAID 1 partition.
Since I wanted to experiment with Xen, I decided to use grub to boot.
After using the following under grub 0.97:
grub> find /grub/stage1
 (hd0,0)
 (hd1,0)

grub> root (hd0,0)
 Filesystem type is ext2fs, partition type 0xfd

grub> 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)"...  15 sectors are embedded.
succeeded
 Running "install /grub/stage1 (hd0) (hd0)1+15 p(hd0,0) /grub/stage2
/grub/menu.lst"... succeeded
Done.

I repeat the procedure for hd1 (/dev/hdc).

I reboot, at this time the screen scrolls but nothing is printed except some
intermittent smiley character.
And a second after the boot hangs with just a smiley printed on the last 
line of the screen.
It never printed anything, I'm not sure it even found stage1...

I updated the bios of the motherboard to the latest version available, but it
didn't change anything. Installing Lilo again, and the server boots fine.

The RAID is built with two (slightly differents) PATA drives (both masters of
each IDE bus).

The menu.lst has been produced by debian's update-grub and contains the right
options.
Oh, and I also checked the device.map and it seems good to me (hd0 is mapped 
to /dev/hda and hd1 mapped to /dev/hdc).

Any idea on how I can fix that (or boot a xen dom0 kernel from lilo) ?
Thanks