5,400 RPM. ew.
Lets see, my 2TB Samsung 5400RPM gets 130MB/s
Given that there is a much increased density on the future 4TB disks we can assume around 150MB/s probably.
This is a mass drive for storage. Why would you be installing an operating system on a 4TB drive is beyond me.
If you have TB of data on one drive for storage would you really want a 7200rpm drive that is going to be less reliable and wear out faster?
It's a simple truth that something that has to spin faster is going to wear out faster and get hotter, etc.
I would rather have a magnetic drive that spins even slower (for even longer life and reliability) considering I have them in a RAID array which increases their throughput across a stripe. It's a network storage device so i'm already limited to 125MB/s gigabit anyways.