Creating Dell Server Image

I have been reading this article: http://www.symantec.com/connect/article/714/buildi... and would like to create images for our server configurations. I am having a problem setting up the server to use a single hard drive as stated here:

[quote]Many hardware components are embedded on the motherboard and can either be disabled from the system's BIOS or the case can be opened and the modules can be manually removed thereby disabling its functionality. Consult your hardware manual and warranty before attempting to do this yourself. For example, a server with an embedded PERC controller can be disabled in the system's BIOS which would then default to SCSI. This would then allow the image to be built from one SCSI drive with a small OS partition, rather than three from a typical RAID 5 configuration. The object here is to reduce complexity when building the image in order to have a higher success rate when mass deploying the image to your target hardware.[/quote]

I have SAS drives with an embeded RAID controller. If i disable the Raid controller in the bios, no drives are found when trying to install an OS.

Any help would be appreciated.