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[renaudrenaud]

Hello boys... I have a special request...

Installing a second drive in my DNS320L, I found in the box a little cap. I would like to have a detailed picture of the motherboard to re-install the cap in the correct place. The hardware version is A4.

If think the cap is not in place since a long time, the NAS was working without it.

But, I have detected a strange behavior : my main disk is a 2.5HDD, because I hate noise. So the disk is not noisy and the fan of the DLink is stopped. When I install another 2.5 HDD, with low consumption, even if the temp of the box is at 44°C, the fan is constantly at high speed. I do not now if it is because of the loosen cap, or a kind of rule in the firmware or software, or a normal way to manage 2 disks.

Thanks in advance for the picture, and if you have an answer for the fan running at high, I will take it!

[ivan]

Very difficult to say where the capacitor goes but you should be able to find out for yourself by taking the unit apart, holding the main board up to the light, then looking at the solder side try and find a couple of holes in the solder that let light through.  Check the other side that they are at a place labelled C <some number>, this will most probably be where it came from.

Regarding fan speed:  What are your fan settings from the webUI?

[renaudrenaud]

Well, regarding the cap, I tried to find the place on the motherboard, but there is no hole because it is surface mounting. And everything is "clean", with no special trace, like if the cap was not correctly soldered and move away with no mechanical effort.

Fan is set on "Auto Stopped / Slow /Fast" or something like that because I do not have the real words in English.

[ivan]

Sorry, I should have asked if it was an electrolytic or not.  With SMT it may be possible to find where it came from by looking for raised solder in places labelled C <some number>.  As an aside I have known of people assembling electronic equipment to drop the odd extra component in the case 'just for fun'.

With the fan, make sure it is clean and turns freely.  Set it to 'auto (off, low, high) and, unless the fan is faulty you shouldn't hear it.  I am sitting in our office checking that our clients daily backups are downloading without problems.  Beside me are 11 NAS boxes that are mirroring the clients NAS, I can just hear the fans if I move behind them, the disks operating make more noise.

There are a few things, which I assume you know, that help keep the units cool. 
Don't put them in a small space that restricts natural ventilation, or in fact anywhere that will restrict free air flow. 
Don't put them near radiators or other heat sources.
Make sure there is a clear space under the unit and there is at least 15 cm clear at the back to stop the fan having too much pressure to push against.
Don't, unless absolutely necessary, use them in a high dust situation.
 

[renaudrenaud]

Ha yes, you are right, I can check the motherboard and find a place with a reference... And no component! The best should be the have the schematic...

For the fan, thank you for your informations. I was wondering if the cap is in relation with the fan speed. It is so strange, one disk = fan off, two disk = fan turbo overdrive of the death... And each time this is only 2.5HDD with very low consumption and not a change in the NAS temperature.

I am far from home during the holidays, but I will check the cap when I'll be back in 3 weeks.

Thanks again.