# Prebuilt hl15 with TrueNAS Scale ipmitool issue

**URL:** <https://forum.45homelab.com/t/prebuilt-hl15-with-truenas-scale-ipmitool-issue/1262>\
**Category:** Software & Applications\
**Tags:** fans, help-and-suggestions\
**Created:** [March 7, 2024, 5:07pm UTC](https://forum.45homelab.com/t/prebuilt-hl15-with-truenas-scale-ipmitool-issue/1262 "2024-03-07T17:07:02Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Sywor](https://forum.45homelab.com/user_avatar/forum.45homelab.com/sywor/32/925_2.png) [@Sywor](https://forum.45homelab.com/u/Sywor)\
**Post date:** [March 7, 2024, 5:07pm UTC](https://forum.45homelab.com/t/prebuilt-hl15-with-truenas-scale-ipmitool-issue/1262/1 "2024-03-07T17:07:02Z")

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Hi!  
I’m trying to control the fans with ipmitool on my new HL15. I have installed TrueNAS Scale and when I try to run the tool I get:  
`Could not open device at /dev/ipmi0 or /dev/ipmi/0 or /dev/ipmidev/0: No such file or directory`  
The ipmi web interface works just fine. What could the issue be?

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**Author:** ![pcHome](https://forum.45homelab.com/user_avatar/forum.45homelab.com/pchome/32/1207_2.png) [@pcHome](https://forum.45homelab.com/u/pcHome)\
**Post date:** [March 8, 2024, 6:26pm UTC](https://forum.45homelab.com/t/prebuilt-hl15-with-truenas-scale-ipmitool-issue/1262/2 "2024-03-08T18:26:54Z")

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The prebuilt system has the fans are connected to a component that the 45drives team made. That specific PCB is connected directly to the power supply.

[here is a pictured of the module](https://forum.45homelab.com/uploads/default/original/1X/95275bb0627f55f8e1b927b3fb1464d23d8ad049.jpeg) that was posted on a past thread.

The fans are not connected to motherboard.

here is some suggestion by one of members of this forum with a possible suggestion:

> [@Best Fan Upgrades](https://forum.45homelab.com/t/best-fan-upgrades/105/19):
>
> No, any fans - including the stock fans will require you to bypass the power breakout PCB that is included in the HL15 ($800 that doesn’t support controllable fans). Any 120mm fan will fit but you’ll need to wire the fans directly to a motherboard. To make your life easy, you can also get something [like this](https://www.amazon.com/dp/B08Q367BXM?psc=1&ref=ppx_yo2ov_dt_b_product_details) to help the PWM breakout for all the fans.

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**Author:** ![Sywor](https://forum.45homelab.com/user_avatar/forum.45homelab.com/sywor/32/925_2.png) [@Sywor](https://forum.45homelab.com/u/Sywor)\
**Post date:** [March 8, 2024, 10:21pm UTC](https://forum.45homelab.com/t/prebuilt-hl15-with-truenas-scale-ipmitool-issue/1262/3 "2024-03-08T22:21:41Z")

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I was aware of this and should have added it to the original post.  
I have found the issue. In order for the IPMI to properly control the PWM fans the fans have to be 4-pin, not the 3-pin (no sense pin) that are included.  
It all works now after having replaced the fans altogether.

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**Author:** ![schovanec](https://forum.45homelab.com/letter_avatar_proxy/v4/letter/s/2acd7d/32.png) [@schovanec](https://forum.45homelab.com/u/schovanec)\
**Post date:** [March 15, 2024, 5:13am UTC](https://forum.45homelab.com/t/prebuilt-hl15-with-truenas-scale-ipmitool-issue/1262/4 "2024-03-15T05:13:34Z")

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Makre sure you are running `ipmitool` as root. I get the same error as you get if I try to run it as a regular user.