Just some recent numbers because I just replaced some drives in my home server... I grabbed 2x14TB Seagate EXOS drives for $250USD each. A 14TB WD Ultrastar l

Just some recent numbers because I just replaced some drives in my home server... I grabbed 2x14TB Seagate EXOS drives for $250USD each. A 14TB WD Ultrastar looks to be a bit over $400USD each. For 25% more you can get 200% the capacity with the Seagate drives. So for 25% more I can run RAID1 and have redundancy versus a single WD Ultrastar.