First off I DO NOT work for Performance-PCS.com! However, I've bought lots of stuff from them, and I like their site and their service. They cater to the "geek" in me.
Second off I AM NOT an employee of Infrant nor do I proport to be a Jedi Warrior. However I would like to be both.
Third - I didn't design this wonderful piece of equipment so I am only providing ideas for discussion - I'm not going to warranty your mod if your NAS goes boom while following any of my Inspector-Gadget-like suggestions.
I'm new to the forum and to the NV+ but after reading what seems like most of the threads on heat and noise issues with drives, power supplies, etc. I had a couple ideas I thought I would share to stimulate discussion and/or help some of you with real problems find alternative solutions.
It seems to me that the basic problem we are all trying to solve is to keep fan noise at an acceptable level while simultaneously keeping both the power supply and hard drives at reasonable temperatures.
Unfortunately the physics of this particular problem requires that in order to decrease noise we will increase temperatures and vice versa.
After a fairly exhaustive look through fan specifications it appears to me that Infrant did a nice job of specifying a cooling fan with a high CFM/dB rating. That is - the fan moves LOTS of air for the amount of noise it puts out.
Looking to replace the fan with almost anything else will either increase the temperatures because the amount of air moved (CFM) is lower or it will increase the noise because of fan speed, air turbulence and a variety of other factors.
I think the best way to solve this problem for those users who REALLY desire a fix is to retrofit a larger fan to the exterior of the unit.
I have included my ideas below with part numbers for a rear mounted solution that I believe would be the easiest to implement and give the best results.
First off here is the data that I am using in my assumptions:
1) From http://us.st11.yimg.com/us.st.yimg.com/ ... 47_2753397
the model number of the ADDA replacement fan is visible.
2) From http://www.coolpowersolutions.fi/Datasi ... a76gl.html
the specs of the fan are available:
ADDA DC FAN
Patch cord 3 Pin Board
Dimension A 92 mm
Dimension B 25 mm
Dimension C 82,5 mm
Bearings ball bearing
Nominal voltage 12 VDC
Noise 38 dB(A)
Power input 4,08 W
Nominal speed 3000 min-1
Air flow 81,5 m3/h (OR if I did the math right = 47.8 cfm)
Weight 101 gr.
3) From http://www.mouser.com/catalog/625/1466.pdf
additional data on the replacement fan for the NV+:
AD = Adda Brushless DC fan
09 = DC Frame size = 92mm
12 = DC Voltage = 12VDC
H = Speed = High (note there are also Ultra low, low, medium, ultra high, over ultra high, and maximum high speed)
B = Bearing type = BALL bearing
A = Thickness for DC fans = 25 mm
7 = Blade impellers on DC fans = 7
6 = Motor protective circuit & Third wire lead = by transisitor with speed sensor (FG)
GL = Fan type = Low noise
Additional information on ADDA fans is available here: http://www.mouser.com/catalog/625/1466.pdf
and here: http://www.mouser.com/catalog/630/1609.pdf
The KEY to maintaining at least the same level of cooling capability that we currently have is to maintain the same level of airflow. Based on the specifications this value must be at least 47.8 cfm:
The Scythe "KAZE-JYU" 100mm Silent 100mm Fan (fits in 92mm hole pattern) - Sleeved claims to provide 58 CFM at 30.68 dB - This is both significantly quiter and provides significantly greater airflow. If it fits inside our shiny box it might be a fantastic solution. However since it's maximum fan speed is 2000 rpm vs. the stock fan's 3000 rpm it isn't completely clear to me whether the min fan speed add-on will work or whether another firmware modification would be required. Also it isn't clear whether this unit will physically fit inside the NV+ as I don't have one available to try.
http://www.performance-pcs.com/catalog/ ... ts_id=4390
The best option to reduce both sound and temperatures may be to remove the factory fan and carrying handle and install a 92mm to 120mm fan adapter on the exterior of the NV+.
http://www.performance-pcs.com/catalog/ ... ts_id=2854
A WIDE variety of 120 mm fans are available with both low noise and high cfm. Just be sure to not exceed the power header's maximum current output (NO PROMISES but the motherboard should be at least capable of handling the replacement fan's requirement of 3 Watts (12V x 0.25A).
Here is a beauty: http://www.performance-pcs.com/catalog/ ... cts_id=876
Or: http://www.performance-pcs.com/catalog/ ... ts_id=4073
at 1200 or 1600 rpm NOT 600!
Don't forget to buy a 120 mm grill for your fan to keep your fingertips intact.
If you choose to go crazy and bl.ow in vs. bl.owing out you could even install a filter to the outside of the fan: http://www.performance-pcs.com/catalog/ ... x&cPath=92
For those who really have the "modding-bug" imagine a 120mm blue LED fan mounted to the exterior of the hinged front door blowing into the unit!
Am I "One with the force?" Or have I joined the Dark-side?