Rah33,  Unfortunately the S100 and the S300 raid controllers do not have support for Microsoft Windows Server 2012, and currently there is no plan to support these controllers with Microsoft Windows Server 2012 in the future. If you're using the S300 controllers, you would need to either get the hardware raid controller (h700), or you would need to follow this procedure to proceed.   You can read more on this here. I hope this helps answer your question, even though it is likely not the answer you wanted to hear.  
I've got my SAS disks in a RAID 5 array  (PERC S300, Poweredge R415) and all show as online. When I go through Lifecycle to deploy Server 2012 R2 it doesn't see the disk to install the OS to. I've tried to load the extracted driver via USB but it comes up to say there is no signed drvier available. Can you point me to correct driver I should be using? 
2012 R2 Install Issue on Poweredge R415