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[PLC]

My new DNS-320 is located in my basement where the temperature is barely 72F/20C.  Even in hibernation, the system reports a temperature of 111F/44C.  I left the case opened for over an hour and, although the hard drives felt very cold to the touch, the system temperature reading did not drop significantly.  I believe that this is the reason why the fan won't stop running at low speed.  Are these temperature readings normal?  Is there any way that I can adjust the fan activation settings?  Shouldn't the fan shut down when the device is in hibernation (power light off)?  I set the fan control to Auto (Off/Low/High) and I saved those settings multiple times, just in case.  I'm running firmware version 2.02.

Thanks,

[albert]

Suspect your is a 'lemon' set.

Have you try setting the fan to off and see if the system temperature goes up?

[PLC]

I would if I could but the firmware does not allow you to turn off the fan, it's either on Automatic or always on.  After doing some more research on the internet, it appears that I am not alone in having this problem.  If the device relies on active cooling when in standby mode with a tiny noisy little fan then this is a badly designed product.  I returned my device to the store claiming that it was defective and bought some other network drive that is passively cooled.  I'm not having any luck with D-Link products, I always end up returning them.  Lesson learned, again!!!

[albuemil]

I know my answer might not be completely related to the original post since I didn't have the problem of the fan not reacting, it only didn't want to go to the OFF state.
It did change to LOW from time to time, but most of the time it was on HIGH.

I "fixed" the problem of the noisy fan by taking off the top of the unit and putting there an 80mm silent (Noctua) fan connected to the USB port of the NAS. The fan blows air downwards over the HDDs. Now the unit always reports as being around 40 centigrades (103 Fahrenheit) and the HDDs report as having 27 centigrades (80 Fahrenheit).
Because of this, the internal fan is OFF all the time.

I know it's not the most elegant solution, but it works great. Now, all i have to find out is how to put a filter between the fan and the unit so it won't get filled with dust.

P.S. the fan just "sits" on top of the HDDs for now, I'll have to see if i can make a support for it. I don't exactly want to modify the top of the unit as i would have to drill a big hole in it for the air to enter 

[Linhares]

I know my answer might not be completely related to the original post since I didn't have the problem of the fan not reacting, it only didn't want to go to the OFF state.
It did change to LOW from time to time, but most of the time it was on HIGH.

I "fixed" the problem of the noisy fan by taking off the top of the unit and putting there an 80mm silent (Noctua) fan connected to the USB port of the NAS. The fan blows air downwards over the HDDs. Now the unit always reports as being around 40 centigrades (103 Fahrenheit) and the HDDs report as having 27 centigrades (80 Fahrenheit).
Because of this, the internal fan is OFF all the time.

I know it's not the most elegant solution, but it works great. Now, all i have to find out is how to put a filter between the fan and the unit so it won't get filled with dust.

P.S. the fan just "sits" on top of the HDDs for now, I'll have to see if i can make a support for it. I don't exactly want to modify the top of the unit as i would have to drill a big hole in it for the air to enter 

I've made the same thing, instead with a NoiseBlocker fan 
quieter and cooler (than oem)

PLC, up the 40ºC in the internal sensor get's the fan to start. There isn't for now any (useful) way to control it. And it's a small, noisy fan 
There is a smal script to change fan performance altough, but can't control for a temperature set.
Search for "DNS-320 Fan control script" 

[BlackBishop64]

I've had a similar problem, the unit became very hot with fan always on at high speed. I had to reset to default factory settings to solve the problem. Not nice.

[sancocho]

When files are being accessed over the network, my fan is usually on high. The rest of the time the fan is always on low. Once in a blue moon, it will actually shut off, but that is very very rare. If I disconnect the DNS-320 from the network, the fan shuts off after a few minutes. I don't have any of the servers enabled on it (iTunes, FTP, P2P, nothing). I'm really hoping the next firmware fixes this.

[brewster0101]

Do the hard drives really get that hot without the fan to cause any real concern? Hard drives can tolerate a bit of heat.

[albuemil]

Do the hard drives really get that hot without the fan to cause any real concern? Hard drives can tolerate a bit of heat.

The problem is that without the fan working, because of the way the case is designed, there is very little air movement, that will cause the HDDs to overheat very quickly. Also, HDDs tend to fail sooner the higher the temperature they work at, so it's not a bad idea to keep them as cool as possible.

[BlackBishop64]

I am thinking about cutting the back side of the case and cover with a steel or aluminium perforated sheet.
http://www.amazon.com/s/ref=bl_sr_industrial?field-brandtextbin=Perforated%20Metals%20Plus&node=16310091
Then, I would install a bigger fan.

It is just an idea, if I finally do it I will post you all the process with detailled pictures.