I am booting off of a USB drive and using (or will use) the 3TB drive for storage, so that angle is covered.
The storage controller driver could be an issue, though. If it is, I'll need to hunt around for some clear, i.e., treat-me-like-I'm-a-6-year-old, instructions. I am booting Ubuntu 16.04, so that adds a layer of complication. I could create a Live USB of Fedora, though, which should be able to use whatever tools HP had available for its Red Hat derivative.
Also, thanks for the reply.