Grub install fails on compaq smart array (ML370) everything, install, error, grub

amy

Hi Guru's      
I'm trying to install  7.04 server on a Compaq ML370 with a Smartarray controller. I used smartstart to configure 2 raid5 volumes; one for the OS and one for data. During the install process everything goes fine until grub wants to be installed. I prefer to have grub installed on a partition instead of the MBR because compaq uses that for system purposes. Grub and Lilo both fail with the message that they can't be installed and it's a fatal error.      
Also tried  6.10 server and tried to install on the MBR as well. No difference.      
Searched the forum for solutions but without results. Does the problem look familiar to any of you? Suggestions are very welcome.
Regards, Kriebel