I think 30C is below the optimum temperature. In fact I believe they’re generally running their disks too cold. Something like 40C is better.

Indeed this. I have WD drives that go up to 59C in a actively cooled NAS case.

I want to know if there is higher chance of it to fail due to this. But accoding to backblaze, I guess not.

I agree. Thanks backblaze for sharing your data, but I have observed failure in multiple WD greens due to high temp. What happens is the engine grease goes hard, and then this causes a lot more heat generation due to the mechanical resistance, until the grease is so bad the engine seizes and then the drive fails. In my case I had 3 identical drives in a RAID5, and the first drive died this way but kept generating heat, and also transmitted enough heat through the metal chassis to heat the next drive to its point of failure, and so I lost 2 out of 3 drives in short succession from the run away effect of heat creating more heat.

Now I want to know if I will be able to safely run a WD purple surveillance drive in an NVR in a shed with ambient temp up to 60C. Specs on the WD green say 0-60, and the WD purple surveillance say 0-65. So it is within tolerance, but not by much. If anyone has any data on drives run close to their specified limit, please post. Suck it and see, or time to buy up SSDs which presumably without the mechanical engine might have more heat tolerance but less constant write cycles.

Yeah Pointless. Those are all cold. I want to see if 50° is bad. My home NAS gets to 50. You call no correlation at 30 because that’s normal!

slow is steady