Used drobo procssor3/23/2023 I’m fairly happy with this, because the drives are benchmarked at about 4W idle, and 5.6W while seeking. This is while running a BitTorrent client, and so all four hard disks are spinning. The normal total power consumption is about 43W. The hard disks can be noisy when seeking. CPU and hard disk temperatures are normally 35-45☌, depending on the ambient temperature. The motherboard does dynamically adjust the case fan speed based on the CPU temperature. The case includes a PSU fan and a 120mm case fan, which are fairly quiet. I wanted to minimise noise, so passive CPU cooling appealed to me. Newer Atom CPUs, such as the D510, should be more power-efficient overall because of the on-die memory controller and graphics, but none were readily available. Also, FreeBSD supports the Ethernet chipset, which was important (see below). I chose the motherboard because it hit the sweet spot of price, power consumption, number of SATA ports, and availability. (For a 6-bay NAS, the Lian Li PC-Q08 got a decent review, but the Fractal Array R2 did not.) CPU and motherboard The other 4-bay NAS case option I found, the Chenbro ES34069, was even more expensive. Some basic instructions would have been nice – it took 5-10 minutes of fiddling to figure out how to get drives inside. The case was a little expensive, but it does the job well. This is almost exactly the cost of a 5-bay Drobo FS, without drives, at £476.54! Case
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