Built a new machine, the moment Unraid is running there are strange interference sounds coming from the back of the machine.

Submitted ⁨⁨10⁩ ⁨months⁩ ago⁩ by ⁨OrangeCorvus@lemmy.world⁩ to ⁨selfhosted@lemmy.world⁩

Built a small machine using an Asrock N100DC-ITX motherboard, it has an Intel N100 built in and I also have 1x NVMe and 2x HDDs. The board has a DC Jack so no external PSU.

First time I booted it, the NVMe had Opensuse on it so I played around a little, no problem. When I boot into BIOS also no problem.

When I boot into Unraid, there is a strange sound coming from the back of the board, sounds like an interference sound. I cannot tell if it’s coming from the ethernet port or from the power DC Jack. I think it’s from the power.

I recorded it with my phone and bumped the sound +20 dB, this is how it sounds like. You can hear the fans and that sound. soundcloud.com/user-300866676-719653331/n100-1 soundcloud.com/user-300866676-719653331/n1002

For power I tried using both an Intel NUC 65w power adapter and an Asus laptop 90w power adapter, the one Asrock recommends on their website. The system has been running for 1-2days, with 4 containers and Home Assistant VM, it idles at around 16w. Without Home Assistant, it drops to 11w.

Any idea what that sound is?

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Comments

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snekerpimp@lemmy.world ⁨10⁩ ⁨months⁩ ago
Sounds like coil whine.

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- OrangeCorvus@lemmy.world ⁨10⁩ ⁨months⁩ ago
  I thought about it but wasn’t sure. Maybe it’s coil whine coming from the DC plug. Bought the board end of October so I cannot return it anymore. Any tips on how to improve it? Still it’s strange that it’s only doing it in Unraid. In Opensuse I tried to push the system but there was no sound, it just worked. That’s what throws me off.
  
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  - snekerpimp@lemmy.world ⁨10⁩ ⁨months⁩ ago
    Don’t know man. I have a 10gb nic that makes different noises depending on if it’s passed through to opnsense or Debian.
    
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  - MaggiWuerze@feddit.de ⁨10⁩ ⁨months⁩ ago
    Why wouldn’t you be able to return it if it shows signs of malfunction within a year?
    
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DarkThoughts@kbin.social ⁨10⁩ ⁨months⁩ ago
Sounds like coil whining to me too, albeit a pretty loud one. It's typically GPUs and / or PSUs that are the culprit when they're under load.

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Septimaeus@infosec.pub ⁨10⁩ ⁨months⁩ ago
Not sure but I’d guess VRM. Would test using microphone. If no RMA or pending FW update, would try disabling problematic c-states and/or dampening with thermal pads.

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- OrangeCorvus@lemmy.world ⁨10⁩ ⁨months⁩ ago
  I tried to disable c-states and went on a lot of BIOS settings. The sounds is only gone when I turn off Intel Turbo Boost Technology. Then it’s silent but I guess it also kills my performance in Unraid now it shows it at 792 MHz.
  
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  - Septimaeus@infosec.pub ⁨10⁩ ⁨months⁩ ago
    Nice, sounds like you narrowed it down.
    
    You can leave turbo boost on and make more subtle adjustments using command line utilities like cpufreq or with GUI-based unraid plugins like this one.
    
    Before spending time fiddling with settings though, you might try default profiles like power_balance. If it comes to manual adjustments, I would try limiting max clock speed first.
    
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MNByChoice@midwest.social ⁨10⁩ ⁨months⁩ ago
Power at idle and with Home Assistant running. I assume the noise is when the power draw is higher, but that is unclear.

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- OrangeCorvus@lemmy.world ⁨10⁩ ⁨months⁩ ago
  The sound is present since the first time I booted Unraid, with only the NVMe, no HDDs and no docker/VMs.
  
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  - MNByChoice@midwest.social ⁨10⁩ ⁨months⁩ ago
    Does the sound correspond to the power draw?
    
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MNByChoice@midwest.social ⁨10⁩ ⁨months⁩ ago
To me, it sounds like the HDDs. What is anything is using them? Often raids will scan then entire disk at initial setup.

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- OrangeCorvus@lemmy.world ⁨10⁩ ⁨months⁩ ago
  When I first started building the machine, I only had the NVMe in the board, the HDDs came at a later date. The sound was still present.
  
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tagginator@utter.online [bot] ⁨10⁩ ⁨months⁩ ago
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