RN104 shutdown because disks exceed safe temperature

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Sandshark wrote:

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HolgerGT86 wrote:

 

I logged in to the NAS using ssh and run smartctl. The values returned by smartctl matched the temperature of the disk drives shown in the performance window of the GUI. Seems to be the disk drives are reporting their temperature accurate.

I attached a text file including the complete smartctl output ... just in case someone can see more than I do.

The test confirms that this is not a fan problem but the temperature of the disk drives really goes up immediately after defrag completes - why ever.

 

Since both the ReadyNASOS and smartctl rely on the drive reporting it's own temperature (and the OS probably calls smartctl for that), this only indicates the reported temperature is consistent, not correct.  But with more than one drive reporting a similar temperature, it likely is correct.

 

It sounds like an airflow problem, but with the NAS out on your desk, there shouldn't be anything external contributing to that.  The ambient air temperature is within normal comfort range, correct?

 

Does the fan speed initially drop at the conclusion of the defrag and then have to jump up when the temperature starts to increase?  I've seen the hystereses and step sizes of the fan control to be less than optimal on legacy NASes, but I don't have a lot of newer ones (and no 104) to evaluate them for those cases.  It may be that the greater amount of heat produced by the enterprise drives is outside the expectations Netgear had when establishing the fan control parameters for a 104.  But I've run 2TB and 3TB drives from the same family in both 2 and 4 bay legacy NASes running OS6.x and had no issues with high-intensity processes like initial sync or scrub (I don't use defrag, I think it's mostly a waste of time on RAID and it can quickly increase the space used by snapshots).

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Hello Sandshark,

many thanks for your response, too. I assume the temperature is correct as the drives are really warm/ hot.

The temperature at my desk is about 24°C, in the cellar room, where the RN104 is usually located, the temperature is about 15°C all the year.

When defrag is complete, the fan speed did not go down. It started to increase immediately, first slowly, than in larger steps. It's for sure not the fan ... it is a new one providing more air pressure than the original one. See my response to StephenB, too, please.

The issue is only occuring when running defrag and defrag completed. No issues at all running data scrubbing or disk test. 

We can stop here ... I'll think about how to "resolve" this issue. 

Thanks again!