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What is the best temp to keep harddrives running in? I have harddrives that keep failing due to the temp being to high.

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Daniel - Just a couple of thoughts: How do you know your drives are failing due to the temperature? Are the drives all on the same PC or server, or is this multiple machines in the same environment? – Chris Jun 15 '09 at 1:17
Just a thought, but it sounds like the best temp is a little cooler than what you've got now. – Paul Tomblin Jun 15 '09 at 1:31
After a few drive failures recently, I suggest good airflow is important. I have added an 80 mm fan now dedicated to the hard drives. – Ujjwal Singh Jun 25 at 13:03
up vote 6 down vote accepted

According to Jeff Atwood... hard drives are typically rated to run up to 55C.

Great post on this topic here: Hard Drive Temperatures: Be Afraid

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According to the Google examination of over 100,000 drives, low and moderate temperature doesn't influence the life expectancy of disk drives. Certainly if you keep the internal temp below 45C, there's virtually no effect, and only the slightest of effect for above 45C. That doesn't mean go above the rated temp, however.

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Every drive you own should have environmental specifications available from the manufacturer giving you details on the minimum, maximum and sometimes the recommended operational temperature, as well as details on humidity and shock. Go check out the manufacturers spec sheets.

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Alfredo Milani Comparetti's awesome Speedfan can "access status info from EIDE/SATA/SCSI drives showing...internal data that can be used to diagnose current and future hard disk failures". Essentially it will give you a reading of your drive's SMART status contextualised with real data from other users' disks, providing some interesting aggregated results.

For example, my for my laptop disk:

Your hard disk is a ST98823AS with firmware 3.14.

The average temperature for this hard disk is 41C (MIN=28C MAX=55C) and yours is 51C.


Your hard disk is not below any attribute threshold. This is good.

Your hard disk was never below any attribute threshold. This is good.


NOTE : your hard disk has 23 reallocated sectors...

The final stats show my drive ain't looking so good these days :)

The overall fitness for this drive is 88%.

The overall performance for this drive is 97%.

Note that Sean's answer correlates to the max value listed on Speedfan's hard disk temperature page, and that the results from that tool are aggregated observations only etc etc.

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Although every drive will list its minimum and maximum temperature I believe that most if not all drive manufacturers design their drives to work at an 'ambient' temperature - i.e. out in the open in a regular office or home environment. Now obviously this isn't going to take into account of working in an Egyptian summer or an Antarctic winter but the point I'm making is that they don't actually NEED to be too cold, if you're comfortable with the temperature then your disk is too.

A few have said that they shouldn't get too hot, and that's very true but I was really surprised recently when I discovered that disks can actually be too cold. We have a lot of HP EVA FC-SANs and some of them have their 1TB 'FATA' disks in them. Turns out that these don't like being below about 18 degrees C, they switch into a 'read after write' mode that affects their performance. There's a new disk firmware out to hopefully fix this but it's the first time that I've seen a disk complain about being at such a warm, yet cold, temperature.

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Basically i think drives will work best between 20C/68F (or 22C) and 35C/90F. The one thing I did notice that higher temps will usually cause ECC errors and other errors as well. I believe my 2TB HDD that has been on for about 4 years (2-3 years constant) was around in the 30C range.

The hours that the drive is on is most likely the biggest factor. I have an 80GB drive that is just starting to produce errors and it's avg temps are around 44C. I'd say the best way to keep your drives cool is to just to get a case with front fans leave the ambient temp around 70-76F and you should be fine.

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protected by MadHatter Sep 8 '13 at 5:50

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