Dell Poweredge R710 R720 Fan Noise Control Script

fanctl.sh

#!/usr/bin/env bash
#You'll need to enable IPMI over lan in idrac first
#iDRAC Settings -> Network -> IPMI Settings
#Channel Privilege Level Limit needs to be Administrator
#You may want to create a dedicated username/pass with IPMI permission in iDRAC Settings -> User Authentication
IPMIHOST=idracip
IPMIUSER=username
IPMIPW=password
IPMIEK=0000000000000000000000000000000000000000

FANSPEEDHEX="0x08" # See https://i.imgur.com/u1HMyqI.png
MAXTEMP=60
HYSTERESIS=5

FANFILE=/var/run/autofan

function ipmi() {
        ipmitool -I lanplus -H "$IPMIHOST" -U "$IPMIUSER" -P "$IPMIPW" -y "$IPMIEK" "$@"
}

#For R710, which doesn't have cpu temps, try this line instead:
#if ! TEMPS=$(ipmi sdr type temperature | grep -i inlet | grep -Po '\d{2,3}' 2> /dev/null);
#thanks @bumbaclot
if ! TEMPS=$(ipmi sdr type temperature | grep -vi inlet | grep -vi exhaust | grep -Po '\d{2,3}' 2>&1); then
        echo "FAILED TO READ TEMPERATURE SENSOR: $TEMP" >&2
        logger -t "fanctl" -p user.err -i "Error: Could not read temperature sensor"
fi
HIGHTEMP=0
LOWTEMP=1
for TEMP in $TEMPS; do
        if [[ $TEMP > $MAXTEMP ]]; then
                HIGHTEMP=1
        fi
        if [[ $TEMP > $((MAXTEMP - HYSTERESIS)) ]]; then
                LOWTEMP=0
        fi
done

if [[ -r "$FANFILE" ]]; then
        AUTO=$(< "$FANFILE")
else
        AUTO=1
fi

if [[ $HIGHTEMP == 1 ]]; then
        #Automatic fan control
        ipmi raw 0x30 0x30 0x01 0x01 >& /dev/null || echo "FAILED TO SET FAN CONTROL MODE" >&2; exit 1
        echo "1" > "$FANFILE"
        if [[ $AUTO == 0 ]]; then
                logger -t "fanctl" -p user.info -i "Setting fan control to automatic"
        fi
elif [[ $LOWTEMP == 1 ]]; then
        #Manual fan control
        ipmi raw 0x30 0x30 0x01 0x00 >& /dev/null || echo "FAILED TO SET FAN CONTROL SPEED" >&2; exit 1
        ipmi raw 0x30 0x30 0x02 0xff "$FANSPEEDHEX" >& /dev/null || echo "FAILED TO SET FAN SPEED" >&2; exit 1
        echo "0" > "$FANFILE"
        if [[ $AUTO == 1 ]]; then
                logger -t "fanctl" -p user.info -i "Setting fan control to manual"
        fi
fi

Hi am interested in how to implement this on a Dell R720? Please let me know thanks.

would it be something like c:>Bash script-filename.sh?

You'll need to configure iDRAC properly as indicated in the top comment, then change the first 4 variables in the script:

IPMIHOST=idracip
IPMIUSER=username
IPMIPW=password
IPMIEK=0000000000000000000000000000000000000000

Then you can run the script from any machine that can access the iDRAC IP. If you're running on Windows, you'll need to install WSL and a Linux distro first in order to use bash.

Thanks Aram Awesome! I just realized yes, I do need to install WSL and Linux Distro. On another note, take a look at this script, I got it from Brad over on shiny tech things on youtube. I have made some edits to get it to at least show temps and date output but am not sure it is adjusting fans to temp sense. Would appreciate it if you could give me some pointers as to what I need to fix in the code. Meanwhile I will install WSL n DISTRO. Thanks $iDRAC=”xxx.xxx.xxx.xxx” $usr=”xxx” $pw=”xxx” $i=0 $path=”C:\Program Files\Dell\SysMgt\iDRACTools\IPMI” $FanControlEnable =”ipmitool.exe -I wmi -H $iDRAC -U $usr -P $pw raw 0x30 0x30 0x01 0x00” $FanControl20 = (“ipmitool -I wmi -H $iDRAC -U $usr -P $pw raw 0x30 0x30 0x02 0xff 0x14”) $FanControl30 = (“ipmitool -I wmi -H $iDRAC -U $usr -P $pw raw 0x30 0x30 0x02 0xff 0x1e”) $FanControl40 = (“ipmitool -I wmi -H $iDRAC -U $usr -P $pw raw 0x30 0x30 0x02 0xff 0x28”) $FanControl50 = (“ipmitool -I wmi -H $iDRAC -U $usr -P $pw raw 0x30 0x30 0x02 0xff 0x32”) $FanControl60 = (“ipmitool -I wmi -H $iDRAC -U $usr -P $pw raw 0x30 0x30 0x02 0xff 0x3c”) $FanControl70 = (“ipmitool -I wmi -H $iDRAC -U $usr -P $pw raw 0x30 0x30 0x02 0xff 0x46”) $FanControl80 = (“ipmitool -I wmi -H $iDRAC -U $usr -P $pw raw 0x30 0x30 0x02 0xff 0x50”) $FanControl90 = (“ipmitool -I wmi -H $iDRAC -U $usr -P $pw raw 0x30 0x30 0x02 0xff 0x5a”) $FanControl100 = (“ipmitool -I wmi -H $iDRAC -U $usr -P $pw raw 0x30 0x30 0x02 0xff 0x64”) Invoke-Expression -Command $FanControlEnable While({$true}) { $i++ $cpuTemp = (ipmitool.exe -I wmi -H $iDRAC -U $usr -P $pw sdr elist | findstr “Temp” | findstr “0Eh” | %{$_.split(‘|’)[4]}) $cpuTempDigits= "$cpuTemp.Substring(0,3)" $cpuTempDigits switch ($cpuTempDigits) { {1..60 -contains $_}{write-host “Fan set to 20%” ; Invoke-Expression -Command $FanControl20} {61..70 -contains $_}{write-host “Fan set to 30%” ; Invoke-Expression -Command $FanControl30} {71..75 -contains $_}{write-host “Fan set to 40%” ; Invoke-Expression -Command $FanControl40} {76..80 -contains $_}{write-host “Fan set to 50%” ; Invoke-Expression -Command $FanControl50} {81..83 -contains $_}{write-host “Fan set to 60%” ; Invoke-Expression -Command $FanControl60} {84..88 -contains $_}{write-host “Fan set to 70%” ; Invoke-Expression -Command $FanControl70} {89..90 -contains $_}{write-host “Fan set to 80%” ; Invoke-Expression -Command $FanControl80} {91..93 -contains $_}{write-host “Fan set to 90%” ; Invoke-Expression -Command $FanControl90} {94..95 -contains $_}{write-host “Fan set to 100%” ; Invoke-Expression -Command $FanControl100} } Write-Host “Action has run $i times at” (date) }

Assuming the script syntax is correct, and I'm not sure that it is because I'm not familiar with what looks like PowerShell, it would appear that the script is setting the fan speed based on the temperature ranges in the switch statement.

yes it is Powershell ISE run as admin. It should invoke the $FanControl20 etc. It just does not seem to be doing it. Thanks though

Will try your .sh

Did; and:

C:\Users\Wesby_Designs\Documents\WindowsPowerShell\Scripts>bash fanctl.sh
FAILED TO READ TEMPERATURE SENSOR!

That suggests your IPMI configuration isn't working. Try setting the environment variables manually and running ipmi sdr type temperature.

I also updated the script to show the error message when you run it.

Set Dedicated IPMI User; ran .sh and:

C:\Users\Wesby_Designs\Documents\WindowsPowerShell\Scripts>bash fanctl.sh
Error: Unable to establish IPMI v2 / RMCP+ session
FAILED TO READ TEMPERATURE SENSOR:

C:\Program Files\Dell\SysMgt\iDRACTools\IPMI>IPMITOOL -I wmi -H 1xxx -U xxx -P xxx sdr type temperature
Inlet Temp | 04h | ok | 7.1 | 26 degrees C
Exhaust Temp | 01h | ok | 7.1 | 32 degrees C
Temp | 0Eh | ok | 3.1 | 53 degrees C
Temp | 0Fh | ok | 3.2 | 51 degrees C

Do you have ipmitool installed in your bash environment? What happens if you run ipmitool -I lanplus -H "$IPMIHOST" -U "$IPMIUSER" -P "$IPMIPW" -y "$IPMIEK" sdr type temperature in bash, replacing all the variables with their values as in your windows ipmitool command.

Yes Installed. Ran and:
C:\Users\Wesby_Designs\Documents\WindowsPowerShell\Scripts>bash fanctl.sh
Error: Unable to establish IPMI v2 / RMCP+ session
FAILED TO READ TEMPERATURE SENSOR:
FAILED TO SET FAN CONTROL SPEED

Seems pretty clear that its a connectivity or configuration issue and not an issue with the script itself, sorry. You'll have to figure out how to get ipmitool working from your environment then the script should just work, assuming you've entered the host, user, etc correctly.

My only edit to have it work is:

function ipmi() {
ipmitool.exe -I lanplus -H "$IPMIHOST" -U "$IPMIUSER" -P "$IPMIPW" -y "$IPMIEK" $@

oh yeah it will work am sure both versions; am in agreement something in the servers idrac settings not right. When I first ran the PW script it did seem to work then I did bios idrac an lifecycle updates and then no go. So am now back to the older server profile but now can't get either PW script or your bash script to work....thank you very much for all your time and effort.

Resorting to repurposed server and start fresh.

THANKS KASOND great work on the script by the way!

Aram Hi thanks for the pointers. Hope all is well with you.

Connectivity set am able to log in to a dedicated IPMI serial channel VIA remote. Ran bash with no edits other than comments and variables. Response too a while getting a Server execution failed. :)

Hello,
I've developped a little Docker container based on someone else's to set manual fans speed and monitor CPUs temperatures. Don't hesitate to check, use & help : https://github.com/tigerblue77/Dell_iDRAC_fan_controller_Docker
Thanks !