you'll need to provide a driver for Suse to recognise the RAID drive you've created. This is easier said than done, since few manufacturers provide much in the way of recent distro drivers. Check out http://www.lsilogic.com/downloads/selectDownload.do
for some suitable drivers, but from what I can see there's not much Suse support. If you do find a driver worth trying, get it onto a floppy.
In Redhat you would boot from the CD, and when presented with the options screen, you type "linux dd", to specify that you need to load a driver disk, and hit enter; I've not used suse in yonks so I'm presuming its roughly the same system here. It then prompts you to put your driver disk in, and loads the RAID driver before the install kicks off. Google for drivers for your LSI card, or try and load a generic driver if Suse will let you, like the MegaIde driver, or an intel ICH driver.
Good luck mate.