DS411+II (and others) CPU Fan noise - revisited

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le_squirrel
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Re: DS411+II (and others) CPU Fan noise - revisited

Postby le_squirrel » Thu Jun 15, 2017 6:35 pm

As I plan to keep my DS411+ another 4 years, I'd love to be able to use any fan I want, for an efficient and quiet cooling.

@mjanssen7850, could you please share your DIY work to achieve Tach -> Lock Rotor signal conversion ?

In the meantime, I've just ordered the following fans :

CPU fan : mod note: shop link removed
Lock Rotor signal, with almost the same specs as the stock CPU fan : 6CFM / 22,5db / 0,72W / 5500RPM (vs 5.22 CFM / < 21db / 0,84 W / 5000 RPM)
Only drawback = 20mm width (vs 10mm), but I think it will pass

Case fans : mod note: shop link removed
Lock Rotor signal, with similar specs as stock case fans : 36CFM / 26db / 1,08W / 2700RPM (vs 29 CFM / 30db / 0.8 W / 2500 RPM)
Only drawback = 25mm width (vs 20mm), I'll have to remove the metal protection grid and maybe dremel the HDDs drawers' plastic handles

Hope everything will run fine, I'll keep you posted.

Thanks to everyone for all the infos and the sharing !
DS411+ 4x 4To
Giga Switch: Netgear GS605
UPS: EATON/MGE Ellipse Max 600 USBS FR
Comp: i7-7700K Win10 pro
le_squirrel
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Re: DS411+II (and others) CPU Fan noise - revisited

Postby le_squirrel » Mon Jul 03, 2017 3:46 pm

le_squirrel wrote:(...)
In the meantime, I've just ordered the following fans :

CPU fan : mod note: shop link removed
Lock Rotor signal, with almost the same specs as the stock CPU fan : 6CFM / 22,5db / 0,72W / 5500RPM (vs 5.22 CFM / < 21db / 0,84 W / 5000 RPM)
Only drawback = 20mm width (vs 10mm), but I think it will pass
(...)


This fan has been running for a week now in my Syno, with almost no hiccup.

Strangely I had one failure alert after first power on (maybe failure from a case fan ? I haven't replaced them for now), but everything seems OK since.

I used "scotchlock" connectors to wire the new fan (I cut the wires of the old fan, to keep the 3 pin connector), without having to solder :
mod note: shop link removed
I also had to find longer screws to attach the thicker fan to the CPU radiator.

- The HDD temps are OK, and no problem to report, despite its double height compared to the stock CPU fan.
(Don't know how to monitor the CPU temp...)
- The noise level is similar to when my Synology was brand new.
DS411+ 4x 4To
Giga Switch: Netgear GS605
UPS: EATON/MGE Ellipse Max 600 USBS FR
Comp: i7-7700K Win10 pro
andersab
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Re: DS411+II (and others) CPU Fan noise - revisited

Postby andersab » Sun Oct 29, 2017 5:17 pm

Just ordered the parts. I am trying this before I totally get rid of my Synology. Very frustrated I cannot still buy parts from Synology. Thank you for the time and effort you have put into this and sharing.
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Re: DS411+II (and others) CPU Fan noise - revisited

Postby markii » Mon Jan 01, 2018 11:02 am

I am looking replacements for Synology DS411+ case fans. I looked at this thread numerous times, with CPU fan it seems to be easy - ebay'd "1604KL-04W-B59-B00" and ordered one. But I have hard time with case fans, maybe someone can help what manufacturer/model to choose.
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Re: DS411+II (and others) CPU Fan noise - revisited

Postby dlong » Mon Jan 15, 2018 12:03 am

le_squirrel wrote:As I plan to keep my DS411+ another 4 years, I'd love to be able to use any fan I want, for an efficient and quiet cooling.

In the meantime, I've just ordered the following fans :

CPU fan : mod note: shop link removed
Lock Rotor signal, with almost the same specs as the stock CPU fan : 6CFM / 22,5db / 0,72W / 5500RPM (vs 5.22 CFM / < 21db / 0,84 W / 5000 RPM)
Only drawback = 20mm width (vs 10mm), but I think it will pass

Case fans : mod note: shop link removed
Lock Rotor signal, with similar specs as stock case fans : 36CFM / 26db / 1,08W / 2700RPM (vs 29 CFM / 30db / 0.8 W / 2500 RPM)
Only drawback = 25mm width (vs 20mm), I'll have to remove the metal protection grid and maybe dremel the HDDs drawers' plastic handles

Hope everything will run fine, I'll keep you posted.

Thanks to everyone for all the infos and the sharing !


Can you post the model / part numbers? We can search for that... as the mods have removed the link. Thanks.
dlong
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Re: DS411+II (and others) CPU Fan noise - revisited

Postby dlong » Mon Jan 15, 2018 12:05 am

mjanssen7850 wrote:Hi there,
I know this is an old thread and there are dozens of them about fan replacement, but I just wanted to thank whoever posted the info about the rotation signal used by synology instead of the classic RPM signal.
I too replaced the dead fan of my DS209II and lived with the system warnings and the fan running full speed or not at all no matter what.
Then a few days ago I needed to replace a HDD, and decided to resolve this fan issue. I was tempted to buy an appropriate fan, then decided to go the 'hard' and funny way: I designed a small circuit and wrote a few lines of code. It reads the fan RPM and sends the right locked motor signal to the NAS.
Works beautifully and allows me to use any fan that physically fits. No more false warnings, and if the fan actually stops running, I will get a meaningful warning exactly as if I was using the original fan.


mjanssen7850, please share (in detail) what you did.

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