95 lines
3 KiB
Markdown
Executable file
95 lines
3 KiB
Markdown
Executable file
# fan speed controller for dell R710, R520 etc
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Dells don't like having third party cards installed, and ramp up the
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fan speed to jetliner taking off. But you can override this.
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This speed controller uses ipmi raw commands that seem to be similar
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across a wide range of dell server generations (google searches for
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`ipmitool raw 0x30 0x30 0x01 0x00` show it works for R710, R730, T130,
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and I run this on my R520
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This script monitoring the ambient air temperature (you will likely
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need to modify the $ipmi_inlet_sensorname variable to find the correct
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sensor), the hdd temperatures, the core and socket temperatures
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(weighted so one core shooting up if all the others are still cold -
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let the heatsink do its job).
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It uses setpoints and temperature ranges you can tune to your heart's
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content. I use it to keep the fans low but increasing to a soft
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volume up to 40 degrees, ramp it up quickly to 50degrees, then very
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quickly towards full speed much beyond that. It also has an ambient
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air temperature threshold of 32degrees where it gives up and delegates
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control back to the firmware. Don't run your bedroom IT closet at 32
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degrees yeah?
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It's got a signal handler so it defaults to default behaviour when
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killed by SIGINT/SIGTERM.
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I run it on my proxmox hypervisor directly, hence not needing any ipmi
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passwords. I will start and stop it through proxmox's systemd system
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once I have it firmly debugged.
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I wrote it the night before Australia's hottest December day on record
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(hey we like our coal fondling prime-ministers). It seems to be
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coping so far now that it has reached that predicted peak (I don't
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believe it's only 26 in my un-air conditioned study).
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*****
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# Howto: Manually setting the fan speed of the Dell R610/R710
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1. Enable IPMI in iDrac
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2. Install ipmitool on linux, win or mac os
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3. Run the following command to issue IPMI commands:
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`ipmitool -I lanplus -H <iDracip> -U root -P <rootpw> <command>`
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**Enable manual/static fan speed:**
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`raw 0x30 0x30 0x01 0x00`
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**Set fan speed:**
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(Use i.e http://www.hexadecimaldictionary.com/hexadecimal/0x14/ to calculate speed from decimal to hex)
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*3000 RPM*: `raw 0x30 0x30 0x02 0xff 0x10`
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*2160 RPM*: `raw 0x30 0x30 0x02 0xff 0x0a`
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*1560 RPM*: `raw 0x30 0x30 0x02 0xff 0x09`
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_Note: The RPM may differ from model to model_
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**Disable / Return to automatic fan control:**
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`raw 0x30 0x30 0x01 0x01`
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**Other: List all output from IPMI**
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`sdr elist all`
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**Example of a command:**
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`ipmitool -I lanplus -H 192.168.0.120 -U root -P calvin raw 0x30 0x30 0x02 0xff 0x10`
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*****
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**Disclaimer**
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TLDR; I take _NO_ responsibility if you mess up anything.
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*****
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All of this was inspired by [this Reddit post](https://www.reddit.com/r/homelab/comments/72qust/r510_noise/dnkofsv/) by /u/whitekidney
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