I have a Dell R710 Server with H700 raid controller installed. I have a 1Tb Raid 1 for the OS and a 2Tb Raid 1 and a 3Tb Raid 1 for Data. I configured the Raid in the H700 Raid controller and everything looks great. However when I install the 2012 R2 OS I can only use 2 Tb on the 3Tb Raid array. There is no UEFI option in the bios configuration. How do I enable UEFI on the Dell R710?