Old story, you can google it for the research information, but google says drive temperature isn't as big a deal as some think
. I tend to agree, I have 3 2TB drives which average at 39 degrees; they've been running since they came out (I bought them the day they were released). None have had any more errors than average. If I remember right the study actually says 35-40 is the sweet spot, but drive failures don't start really going up until 50.
My Drives are quite cool at 30C. The fan is designed to cool them. It is the CPU buried under the drives with only a heat spreader on it. Some fins would go a long way. My case is only warm in one spot.... Yup under the CPU and it is plastic. There is a lot of room for improvement here.
The Marvel processor is rated Tj is 105C so I am not too concerned, just perplexed at how little was done to cool it. The Delta $ between a heat spreader or a heat sink has to be much less than a dolor. This is a server after all, failure is not an option. With a fake air grill on the front it is even more perplexing.
Just a suggestion.
PS: now that I looked at the link, I remember seeing that when it came out. Funny thing, My PC drives are 40 and 33C (they are not the low RPM energy saving types) and my CPU is at 29C. Maybe I went overboard with the cooler
(I know I did not when I stress test the PC, The Intel cooler would go above 99C and keep going (I killed the test before it did))