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NOISY FAN on ML350 G5

wayne forster
Occasional Advisor

NOISY FAN on ML350 G5

This fan is extremely noisy and has become louder since installation just 3 weeks ago.
28 REPLIES
KarloChacon
Honored Contributor

Re: NOISY FAN on ML350 G5

hi

- try reseating cable connection for Fans also swap cables
- clear NVRAM
- update system ROM
- and reseat power supplies

bye
Didn't your momma teach you to say thanks!
GaryD_1
Occasional Advisor

Re: NOISY FAN on ML350 G5

2 of our customers have also this week reported their ML350 G5 servers suddenly having much noisier fans. The HP Server Management page shows all temperatures well within limits with no warnings or errors. I have installed the latest psp on one of the servers but still getting constant high fan noise after the reboot.
Andrew Montague
Occasional Visitor

Re: NOISY FAN on ML350 G5

I too am having this problem with a client server. HP support have tried to fob me off with the idea that it's the heatsink despite the System Managment showing the temp as 30 Degrees.

I'm going to reset the NVRAM (not confident this is it but needs to be tried) and will post back the result.
Trygve Henriksen
Respected Contributor

Re: NOISY FAN on ML350 G5

What's the temperature and humidity in the room?

Any dust buildup on the fans?
(I have never had any problems with dust ruining a fan, even with a lot of dust in the room, but there's always a first time... )

If you have two or more servers with the same fans, is there any possibility of swapping it with one from another server and see if the noise moves?
Andrew Montague
Occasional Visitor

Re: NOISY FAN on ML350 G5

Just to clarify my problem, just in case it is different from the original issue, the fans spin to full speed on boot and do not (as you would expect) spin slower after that. Instead they remain at the full spin despite the System Diags saying that they are running at 'normal' speed.
Andrew Montague
Occasional Visitor

Re: NOISY FAN on ML350 G5

Resetting the NVRAM did the trick - it seems that there may have been an error that was 'stuck' and it was causing the fans to over-rev.

It's much better now, similar to a large workstation. :-)
GaryD_1
Occasional Advisor

Re: NOISY FAN on ML350 G5

Cheers for that Andrew, instructions on how to reset the NVRAM :

[broken link removed on <4/4/2017> by Mod] 

Nik Holmes
Occasional Visitor

Re: NOISY FAN on ML350 G5

I have the same problem on a ML350 G5 which was purchased in May 08. Fan noise suddenly increased hugely over last weekend, and it's definitely the CPU fan which is guilty.

Is resetting the NVR equivalent to updating the BIOS? An HP support person told me to update the BIOS, but that didn't cure the problem.

If I do clear the NVR, will that cause any problems when I restart the system?

I've already booked out a fan replacement under warranty - if clearing the NVR solves this problem, maybe someone should tell the Proliant support people about it?

thanks, nik
wayne forster
Occasional Advisor

Re: NOISY FAN on ML350 G5

I reset the NVRAM using the suggested toggle of switch 6 and power on/off etc but this hasn't worked. Should this be done via the BOIS instead?

For now, I have shutdown, removed the power lead for 2 mins and rebooted. It will be quiet until this afternoon !
GaryD_1
Occasional Advisor

Re: NOISY FAN on ML350 G5

Andrew - Can you confirm if you reset your server's NVRAM using the RBSU option ? (F9 at boot and into adv options)
GaryD_1
Occasional Advisor

Re: NOISY FAN on ML350 G5

another update - On one of the servers with this fan problem I couldn't find the 'clear NVRAM' option in the BIOS (prior to this I had disengaed the hard drives). We then powered down the server and pulled the power cords from the back of the server and left them unplugged for 30 secs. After pushing the drives back in and powering on the server the fans were all back to normal. Hope this helps
Arian van der Pijl
Regular Advisor

Re: NOISY FAN on ML350 G5

I did have 2 clients where the power supply would not throttle down the fanspeed even there was no indication for this excessive 'cooling'.

All readings were normal, guess this could be a issue.
Nik Holmes
Occasional Visitor

Re: NOISY FAN on ML350 G5

Update - disconnecting the server from mains power for a minute restored the fan speed and noise level to normal.

I guess it will go noisy again at some point, but a workaround is as good as a fix!
Digismart
Occasional Visitor

Re: NOISY FAN on ML350 G5

I think that the problem is caused by the power supply.
See  

[Expired Broken link removed on <4/4/2017> by Mod] 

wayne forster
Occasional Advisor

Re: NOISY FAN on ML350 G5

The thread just provided was for ML370 I dont believe that the 350 has pluggable fans?
Nik Holmes
Occasional Visitor

Re: NOISY FAN on ML350 G5

The main system fans are pluggable, but the noise is coming from the CPU fan, which isn't pluggable. But the point from the ML370 thread is that the cure was to change the PSUs, not the fan..?

My fan has gone noisy again, about 4 days after I quietened it by disconnecting from the mains for a short period. So that's only a very temporary fix.

Anyone else cured this problem on a ML350 by replacing PSUs? Any wisdom from HP on this?

Thanks
nik
George Jires
Advisor

Re: NOISY FAN on ML350 G5

Hi,this strange behavior occur regullary on saturday morning,when employes coming to office. System fans are at full speed until server is restarted,then fans work normally. We already try replace system board and power supply,flash newest firmware and install last PSP,but problem persist.Management homepage does not indicate any problem.
I await for reply from HP support,which i wrote to today.
GaryD_1
Occasional Advisor

Re: NOISY FAN on ML350 G5

I raised a support call with HP for one of our ML350 G5's and it is a known issue with the PSU, they replaced it (Warranty swap out) and the problem has gone away. Check your servers to see if it is the PSU fan making the noise, if it is, it does not report a problem in the HP System management page and the PSU will need to be replaced
wayne forster
Occasional Advisor

Re: NOISY FAN on ML350 G5

I also raised a support issue with HP. They had to read this thread to agree there was an issue. They send a new PSU and 5 days later, we're still quiet. Fingers crossed
Aristotelis
Occasional Visitor

Re: NOISY FAN on ML350 G5

I also have the same problem from day 1 (for the past 7 months)

The server is inside an air-conditioned office.

Once every 7-10 days the server would start to make a lot of noise. A shutdown was needed and I had to unplug the power cable before power on in order to stop the noise.

HP replaced the PSU but the problem stayed the same, so I learned to live with it.

However during the last month the noise starts almost every day and I have to restart the server every day - and this is not acceptable!!

I called HP support again and they told me that these servers are designed to operate only inside computer rooms with very low temperatures. They also said that the problem is with the PSU and that there is no solution for it.

However they offered to replace again the PSU just in case...

I'm waiting for the replacement but I really need a permanent solution!!!

Anyone??

Ctrl+Alt+Del
wayne forster
Occasional Advisor

Re: NOISY FAN on ML350 G5

We are almost at 1 month since the new PSU and fingers crossed, have remained quiet. Just keep getting new PSU's until HP come up with a viable fix.
Aristotelis
Occasional Visitor

Re: NOISY FAN on ML350 G5

I replaced the fan 14 days ago and the system is quiet since then!!



Ctrl+Alt+Del
Aristotelis
Occasional Visitor

Re: NOISY FAN on ML350 G5

ignore my previous msg..

I just wanted to write that I replaced the psu (not the fan!!!) and the problem is solved
Ctrl+Alt+Del
juan quesada
Respected Contributor

Re: NOISY FAN on ML350 G5

wow...PSU fixing a noisy fan....who knows...

thanks for adding the answer