SIRIS, ALTO, and NAS: How Do I Change the Fan Speed on SIRIS 3 Business and Enterprise Devices?



How do I change the fan speed on SIRIS 3 Business and Enterprise devices?


  • Datto SIRIS 3 Business
  • Datto SIRIS 3 Enterprise


This article explains how to adjust the fan speed on devices without an ASRock motherboard. If your SIRIS 3 appliance was built with an ASRock motherboard, see this article for configuration instructions.

You can use IPMI to adjust the fan speed on SIRIS 3 Business and SIRIS 3 Enterprise appliances to reduce noise or  increase air circulation.

Settings recommendations

  • Datto always recommends using the default fan settings (on most SIRIS devices, automatic or SMART. On SIRIS 3 Enterprise, no value lower than 40). If you change the fan speed to a different value, you must monitor the appliance's temperatures to ensure that they do not exceed safe thresholds.
  • Use caution when adjusting appliance fan speeds. You may void the hardware warranty if the hard drives reach 60 degrees Celsius.


If you have not done so already, you will need to configure IPMI on the Datto appliance to perform this procedure.

1. Log into the Datto appliance's IPMI. See How Do I Access IPMI on SIRIS 3 devices Remotely From the Partner Portal? to learn more about remote IPMI access on compatible Datto appliances.

s3e.pngFigure 1: IPMI login page (click to enlarge)

2. In the IPMI user interface's left pane, click Properties, followed by Utilities, as shown in Figure 2.

s3e1.pngFigure 2: Properties pane (click to enlarge)

3. Scroll down to Fan Configuration. Set your desired fan speed in the PWM offset field, and click Submit, as shown in Figure 3.

Figure 3: Utilities pane (click to enlarge)

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