WD MyCloud DL4100 + Noctua NF-S12A pwm - push, or pull?

uplink-svk · Jun 21, 2015

Greetings,

I'm just setting up my new WD MyCloud DL4100 with changed fan from it's genuine, to Noctua NF-S12A pwm.

My question is as follows: "Should I install the Noctua in push, or pull configuration?"

Factory default fan goes with pull configuration. But my common sense is telling that pushing fresh air through whole NAS system [it's greatly perforated and vented] gives more sense, since the fan has higher performance in push, compared to pull, due to open environment.

So my question is actually two questions. Why do they create NASes with pull configuration only? Is it really better than push?

And should I go push, or pull? Now I'm on push, and I'm having on two adjacent [from 4 HDD's, there are two space,s will be 3 WD Red Pros in the end] I'm having 46 & 47°C in idle, which is kind of a lot.

Any chance I may get lower temps by going pull? [pulling out air out of whole NAS system, which is greatly perforated, thus, no tunnel/vacuum effect is gonna be achieved in here, at least I think...],

Please help me,

Thank You!

regards

uplink

photonboy · Jun 21, 2015

Pull. Leave it the way it was designed.

If you push into the case it's going to bounce around less efficiently and have difficulty leaving the case.

If you pull out of the case then it simply creates suction through all the open spaces creating an air flow that efficiently is exhausted through the rear.

*If the air flow is actually being pulled INTO the case normally then ignore what I said as perhaps WD tested this and determined it made more sense for some reason, however I highly doubt they made a poor choice so go with their suggestion.

Or test it in idle though it may not make much difference which way you do it unless temps are high.

uplink-svk · Jun 21, 2015

photonboy - I will test it. Though, the NAS is pretty much perforated, so not much space for suction [vacuum] effect, that's what I wrote in the first thread, and that's what worries me. But I'll try it anyway. Thank You!

*the air is being pulled out of the NAS enclosure, it's perforated in front on sides, and in front in general

uplink-svk · Jun 21, 2015

This is weird, now the HDD's hold on 40°C both, no matter what I do to them. Almost like the SMART and temp. readings are frozen, after I replaced the fan's position [which makes no sense :/].

uplink-svk · Jun 21, 2015

So, after some testing, results are clear, push is much better compared to factory pull. Engineers at WD did it this time :/

uplink-svk · Jun 22, 2015

Engineers in WD are idiots. Firstly, because of this:

That's with push: [my configuration, with Noctua]

System Temperature
Normal
Drive1 Temperature
23 °C
Drive3 Temperature
23 °C
Fan Speed
330 RPM
Drive Status
Healthy
RAID Status
Healthy

That's with pull:[factory settings with Noctua]

System Temperature
Normal
Drive1 Temperature
47 °C
Drive3 Temperature
43 °C
Fan Speed
860 RPM
Drive Status
Healthy
RAID Status
Healthy

And secondly, because my AC is whistling. Ffs, really? I need that NAS, and I sleep in the same room, so ffs, how should I sleep in the same room, with whistling AC.

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WD MyCloud DL4100 + Noctua NF-S12A pwm - push, or pull?

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