[Help] D4-320U fans noise level above 50db  [SOLVED]

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wombatto
Posts: 2
Joined: 26 Feb 2026, 19:34
Australia

[Help] D4-320U fans noise level above 50db  [SOLVED]

Post by wombatto »

Hi,
I just got my D4-320U, currently running only 2 HDDs. The temperature for both HDDs was reported at an average of 37 deg celsious. However, the D4-320U seemed to be running at full speed, measuring above 55 dB. Is this normal?

Thanks
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TMzethar
TM Support
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Joined: 27 Oct 2020, 16:43

Re: [Help] D4-320U fans noise level above 50db

Post by TMzethar »

Hi,
D4-320U is suitable for office and server room environments.
35 dB(A) is the noise level in standby/sleep mode. Due to its size and structure, D4-320U uses a powerful small fan, and the noise may increase noticeably during high-speed read/write operations.
When the HDD temperature reaches 37 degrees, the fan runs at medium speed.
Did you measure 55dB at a distance of 1 meter from the device?
If you want a quieter device, you can consider the upright model D4-320.
To contact our team, please send email to following addresses, remember to replace (at) with @:
Technical team: support(at)terra-master.com (for technical support)
Service team: service(at)terra-master.com (for purchasing, return, replacement, RMA service)
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wombatto
Posts: 2
Joined: 26 Feb 2026, 19:34
Australia

Re: [Help] D4-320U fans noise level above 50db

Post by wombatto »

Thanks for the clarification. Yes more or less measured around 1-2 metres
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