Looks like the disk was partitioned by Roon. I'm getting an error. "The selected disk has an MBR partition table. On EFI systems, the operating system can only be installed on GPT disks."
The disk currently shows 3 small partitions called Disk 0 partition 1, 2, and 3, which I think is where ROCK is installed.
It also has Disk 0, unallocated space which is 450 GB which is probably what I need to partition. but setup doesn't do this for me.
Sorry for my lack of knowledge here.
Thanks,
Jerry