I would like to inform you that I recently finished building the archive server for my photo agency project. It is powered by an AMD 2*2,6 Ghz processor and has two internal 2 TB hard-drives. As I am also currently studying for my LPIC-2 Linux certification this is an ideal combination to pick up topics like RAID, LVM etc. configuration.
I will be going to Malsfeld-Dagobertshausen at the weekend and will start setting up everything (installation of CentOS 7, RAID setup etc.)