We just go an Intel Server with 8 Drives and a PCI raid card with 1GB memory on the raid card. I did a Raid 6 with a total 8 drives ( 4TB each) . I installed Windows on the raid 6 volume that I created using the RAID bios. When the install finished and I logged in . I see a 2 TB partition which windows is on and then I see a 20TB unallocated space. Please see the attached image. What do I need to do to make the space usable. I was hoping to have two partitions on this volume since I was going to install Hyper-v and have two vm running and one being a file server with 12 TB of files on it. Someone suggested that this happened because I marked the volum as MBR when creating the RAID volum in the raid bois. ( yes, I did that) . When I go back in the bios , there is nothing there to remove that or change anything . I have attached some pictures. It seems like I could just extend the 2TB drive to the empty space, but I am not sure.