Since there is nothing to complain about, I got through this arrangement a system in which you do hear only the (very quiet) 4TB Seagate hard drives and asked for quiet operation in the BIOS CPU fan.
So de facto a system with 12 TB-striped set space and Win7 Prof, by the SSD & motherboard & CPU power super fast and yet almost inaudibly with low power consumption in a small Inter-Tech ITX-901 housing. Wonderful.
I hear again the Herumgestöhne that no human being as much memory benötig but let about this decision by me alone. Unless the complainers contribute to the construction costs, but what I would refuse. Yes, and I am aware that in three hard drives, the default risk is three times higher than that of one of them.