So I have inherited a server at a client that was recently purchased and setup by the 'other IT guy' who is no longer around. Server is a Dell T320 with a Perc H310 card with three 3TB SATA hard drives. Server 2008R2 is installed and there are three partitions, the boot partition is 250GB, the second partition is 1.8TB and I can format that, the third partition is 3.5TB and I can't do anything with it. Research seems to indicate that the server should of been installed with UEFI BIOS, but installing 2008R2 with a UEFI BIOS seems to be only be done via a specially crafted USB drive? It turns on this server was bought without an OS and that 2008R2 was installed after the fact. I can't really afford to blow this server away and reinstall but I am not sure there is another way to utilize the 3.5TB of disk space vie UEFI without doing so? Is there or am I going to have to craft a special USB drive and reinstall the OS?