M200 with high rpm fan and constant hdd activity

I went to the server room to check on something else, and I was greeted by a very loud fan noise. I traced it to the M200. Also in the server room is an M370. So I have another device to compare it to. Also, on the m200 the hdd activity light is lit constantly. I tried rebooting the M200. Still loud fan. Then I updated the the firmware and rebooted. Still the same issue. The room is cool. According to the dashboard there isn't a high cpu load. Any ideas?


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    james.carsonjames.carson Moderator, WatchGuard Representative

    Hi @MeramecBrad

    The M200/300 has a single fan and ramps it up based on temperature. Room temperature can be enough to ramp it up.

    For earlier M200s there is a patch to lower the speed. See the KB here:


    -James Carson
    WatchGuard Customer Support

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    Thank you for your response. Yes, it looks like I have the B revision. Here are my current readings before applying the patch.
    Cpu temp: 65c
    Sys temp 1: 28c
    Sys temp 2: 26c
    Sys fan: 17763 rpm
    Vcore: 1.024 v
    1.35v: 1.348 v
    5v: 5.043 v
    1.8v: 1.792 v
    3.3v: 3.344 v
    +12v: 12.056 v
    Vbat: 3.248 v

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    edited April 2021

    @James_Carson , I applied the patch mentioned in your article. I rebooted the system. I verified that the module was installed. The fan speed is still 17,763 rpm.
    CPU Temp: [37 C]
    Sys Temp1: [25 C]
    Sys Temp2: [23 C]
    Sys Fan: [17763 RPM]
    VCore: [1.022 V]
    1.35V: [1.348 V]
    5V: [5.043 V]
    1.8V: [1.792 V]
    3.3V: [3.344 V]
    +12V: [12.056 V]
    VBat: [3.248 V]
    Is there something else that I can check?

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    james.carsonjames.carson Moderator, WatchGuard Representative

    Hi @MeramecBrad
    It's probably due to the 25C sensor on the firewall -- That's enough to trigger the fan to spin up.

    Max speed for the fan is ~25k RPM, so it's not running at full tilt. It's just trying to ensure the system stays cool.

    -James Carson
    WatchGuard Customer Support

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