Controlar Fans/Coolers - Linux

Controla os fans/coolers/temperatura  com ipmitool

How to control Dell server fanspeeds with ipmitool

Link: https://wiki.joeplaa.com/en/tutorials/how-to-control-dell-server-fanspeeds-with-ipmitool

Introduction

I'm running a homelab partly as a hobby, but also to support our business needs, especially the software development part. My current setup consist of three servers, one HP and two Dell servers. The HP server is running perfectly fine when considering its temperatures and fanspees. The fans are throttled down pretty aggressively, so I don't really have too much of an issue with noise. It will speed up and make a racket when TeamCity is doing its thing, but that is shortlived.

The Dells however are troublesome. I have a T320 with 8 harddisks running TrueNAS. The disks obviously produce heat and the single fan in the tower doesn't generate enough airflow. Or better said, because the air shroud is missing, the air is not properly routed along the disk and through the CPU heat sink. The CPU will run into the 50°C region (when idling) when the ambient temperature is around 30°C (we're experiencing a heat wave).

The other Dell, a R320, is just loud. The little fans have to spin at an insane rate to keep the CPU cool. On top of that, I flashed the RAID card to passthrough mode for ZFS. The server doesn't get any disk temperature readings and thus preventatively speeds up the fans (this doesn't seem to apply to the T320).

The real solution would be to have a dedicated, air-conditioned (or at least well ventilated) room. But alas, we don't have that luxury. Currently the servers are in a little hallway next to the office. This little room will heat up quickly with three servers buzzing away, so the doors cannot be closed permanently.

A temporary "fix", well it isn't really a fix, because they are still very loud, is to slow down the fans manually using ipmitool commands. The downside obviously is that temperatures will go up quickly. Luckily brezlord made a script to fix that, thanks man!.

The script

I modified it a little to fit my specific usecase:

#!/bin/bash
#
# https://github.com/brezlord/iDRAC7_fan_control
# A simple script to control fan speeds on Dell generation 12 PowerEdge servers.
# If the inlet temperature is above 45deg C enable iDRAC dynamic control and exit program.
# If inlet temp is below 45deg C set fan control to manual and set fan speed to predetermined value.
# The tower servers T320, T420 & T620 inlet temperature sensor is after the HDDs so temperature will
# be higher than the ambient temperature.

# Variables
IDRAC_IP="IP address of iDRAC"
IDRAC_USER="user"
IDRAC_PASSWORD="password"
# Fan speed in %
SPEED0="0x00"
SPEED5="0x05"
SPEED10="0x0a"
SPEED15="0x0f"
SPEED20="0x14"
SPEED25="0x19"
SPEED30="0x1e"
SPEED35="0x23"
SPEED40="0x28"
SPEED45="0x2D"
SPEED50="0x32"
TEMP_THRESHOLD="45" # iDRAC dynamic control enable threshold
#TEMP_SENSOR="04h"   # Inlet Temp
#TEMP_SENSOR="01h"  # Exhaust Temp
TEMP_SENSOR="0Eh"  # CPU 1 Temp
#TEMP_SENSOR="0Fh"  # CPU 2 Temp

# Get system date & time.
DATE=$(date +%d-%m-%Y\ %H:%M:%S)
echo "Date $DATE"

# Get temperature from iDARC.
T=$(ipmitool -I lanplus -H $IDRAC_IP -U $IDRAC_USER -P $IDRAC_PASSWORD sdr type temperature | grep $TEMP_SENSOR | cut -d"|" -f5 | cut -d" " -f2)
echo "--> iDRAC IP Address: $IDRAC_IP"
echo "--> Current CPU Temp: $T"

# If CPU ~~ambient~~ temperature is above 45deg C enable dynamic control and exit, if below set manual control.
if [[ $T > $TEMP_THRESHOLD ]]
then
  echo "--> Temperature is above 45deg C"
  echo "--> Enabled dynamic fan control"
  ipmitool -I lanplus -H $IDRAC_IP -U $IDRAC_USER -P $IDRAC_PASSWORD raw 0x30 0x30 0x01 0x01
  exit 1
else
  echo "--> Temperature is below 45deg C"
  echo "--> Disabled dynamic fan control"
  ipmitool -I lanplus -H $IDRAC_IP -U $IDRAC_USER -P $IDRAC_PASSWORD raw 0x30 0x30 0x01 0x00
fi

# Set fan speed dependant on CPU ~~ambient~~ temperature if CPU ~~inlet~~ temperature is below 45deg C.
# If CPU ~~inlet~~ temperature between 0 and 19deg C then set fans to 15%.
if [ "$T" -ge 0 ] && [ "$T" -le 19 ]
then
  echo "--> Setting fan speed to 15%"
  ipmitool -I lanplus -H $IDRAC_IP -U $IDRAC_USER -P $IDRAC_PASSWORD raw 0x30 0x30 0x02 0xff $SPEED15

# If inlet temperature between 20 and 24deg C then set fans to 20%
elif [ "$T" -ge 20 ] && [ "$T" -le 24 ]
then
  echo "--> Setting fan speed to 20%"
  ipmitool -I lanplus -H $IDRAC_IP -U $IDRAC_USER -P $IDRAC_PASSWORD raw 0x30 0x30 0x02 0xff $SPEED20

# If inlet temperature between 25 and 29deg C then set fans to 25%
elif [ "$T" -ge 25 ] && [ "$T" -le 29 ]
then
  echo "--> Setting fan speed to 25%"
  ipmitool -I lanplus -H $IDRAC_IP -U $IDRAC_USER -P $IDRAC_PASSWORD raw 0x30 0x30 0x02 0xff $SPEED25

# If inlet temperature between 30 and 34deg C then set fans to 30%
elif [ "$T" -ge 30 ] && [ "$T" -le 34 ]
then
  echo "--> Setting fan speed to 30%"
  ipmitool -I lanplus -H $IDRAC_IP -U $IDRAC_USER -P $IDRAC_PASSWORD raw 0x30 0x30 0x02 0xff $SPEED30

# If inlet temperature between 35 and 40deg C then set fans to 35%
elif [ "$T" -ge 35 ] && [ "$T" -le 39 ]
then
  echo "--> Setting fan speed to 35%"
  ipmitool -I lanplus -H $IDRAC_IP -U $IDRAC_USER -P $IDRAC_PASSWORD raw 0x30 0x30 0x02 0xff $SPEED35

# If inlet temperature between 40 and 45deg C then set fans to 40%
elif [ "$T" -ge 40 ] && [ "$T" -le 45 ]
then
  echo "--> Setting fan speed to 40%"
  ipmitool -I lanplus -H $IDRAC_IP -U $IDRAC_USER -P $IDRAC_PASSWORD raw 0x30 0x30 0x02 0xff $SPEED40
fi

Implementation

pfSense

  1. Create a folder /root/fan_control

  2. The Bash executable in pfSense is located in usr/local/bin/bash, so make sure this is specified in the top of the script:

    #!/usr/local/bin/bash
...

  3. Copy the script to the folder

  4. Make script executable: chmod +x /root/fan_control/fan_control.sh

  5. Add iDRAC credentials in script

  6. Run the script to test

  7. Create a cron job with crontab -e and add line:

    * * * * * /usr/local/bin/bash /root/fan_control/fan_control.sh >/dev/null 2>&1

TrueNAS

I followed breznet's guide.

  1. Create a dataset fan_control
  2. Copy the script to the dataset
  3. Make script executable: chmod +x /mnt/store1/fan_control/fan_control.sh
  4. Add iDRAC credentials in script
  5. Run the script to test
  6. Create a cron job in TrueNAS GUI running every minute

cronjob-truenas-fan_control.png


Script controla fan - decimal/hexadecinal

Link: https://forum.proxmox.com/threads/ipmi-tool-error-after-v8-upgrade.129334/page-2

Bash:
#!/bin/bash

# Fancontrol v1.1 2022-09-15 15:42

# Define variables

MAX_FAN=90
MIN_FAN=20
HIGH_TEMP=37
LOW_TEMP=35
SPEED_STEP=10
IDRAC_IP=10.0.0.1
IPMI_USER=fancontrol
IPMI_PASSWORD=yoursupercomplexpassword

# Define Functions

ENABLE_FAN ()
{
 ipmitool -I lanplus -H $IDRAC_IP -U $IPMI_USER -P $IPMI_PASSWORD raw 0x30 0x30 0x01 0x00 > /dev/null 2>&1
}


GET_TEMP ()
{
 ipmitool -I lanplus -H $IDRAC_IP -U $IPMI_USER -P $IPMI_PASSWORD  sensor reading "Exhaust Temp"|sed 's/[^0-9]//g'
}


SET_FAN ()
{
 ipmitool -I lanplus -H $IDRAC_IP -U $IPMI_USER -P $IPMI_PASSWORD raw 0x30 0x30 0x02 0xff $FAN_SETTING > /dev/null 2>&1
}

# File to save the last fan speed

 [ -f fan_speed.last ] || echo $MIN_FAN > fan_speed.last

FAN_SPEED=$(<fan_speed.last)

#-----------------------------------------------------------------------------------------

CURRENT_TEMP=$(GET_TEMP)                # get the current temperature

 if (($CURRENT_TEMP > $HIGH_TEMP)) ; then
    FAN_SPEED=$(expr $FAN_SPEED + $SPEED_STEP)
     if (($FAN_SPEED > $MAX_FAN)) ; then
                FAN_SPEED=$MAX_FAN
        fi
 fi

 if (($CURRENT_TEMP < $LOW_TEMP)) ; then
     FAN_SPEED=$(expr $FAN_SPEED - $SPEED_STEP)
     if (($FAN_SPEED < $MIN_FAN)) ; then
         FAN_SPEED=$MIN_FAN
     fi
 fi

FAN_SETTING=$(printf "0x"'%x\n' $FAN_SPEED)
ENABLE_FAN
SET_FAN

logger -t FanControl "Current Temperature" $CURRENT_TEMP"C" "Fans at" $FAN_SPEED"%"
echo $FAN_SPEED > fan_speed.last

exit 0

Informações adicionais:

Launch a command prompt on the server and navigate to the directory above. Then run the following commands, substituting the ip address (-H), username (-U), and password (-P) of your iDRAC:

To enable remote fan control: ipmitool -I lanplus -H 192.168.1.240 -U root -P calvin raw 0x30 0x30 0x01 0x00

To set the fan to 20%: ipmitool -I lanplus -H 192.168.1.240 -U root -P calvin raw 0x30 0x30 0x02 0xff 0x14

To set the fan to 25%: ipmitool -I lanplus -H 192.168.1.240 -U root -P calvin raw 0x30 0x30 0x02 0xff 0x19

To set the fan to 30%: ipmitool -I lanplus -H 192.168.1.240 -U root -P calvin raw 0x30 0x30 0x02 0xff 0x1e

To set the fan to 35%: ipmitool -I lanplus -H 192.168.1.240 -U root -P calvin raw 0x30 0x30 0x02 0xff 0x23

To set the fan to 40%: ipmitool -I lanplus -H 192.168.1.240 -U root -P calvin raw 0x30 0x30 0x02 0xff 0x28

To set the fan to 45%: ipmitool -I lanplus -H 192.168.1.240 -U root -P calvin raw 0x30 0x30 0x02 0xff 0x2D

To set the fan to 50%: ipmitool -I lanplus -H 192.168.1.240 -U root -P calvin raw 0x30 0x30 0x02 0xff 0x32

TABELA CONVERSÃO DECIMAL PARA HEXADECIMAL

Decimal-hexadecimal-binary conversion table

Dec Hex Bin   Dec Hex Bin   Dec Hex Bin   Dec Hex Bin
0 0 00000000   64 40 01000000   128 80 10000000   192 c0 11000000
1 1 00000001   65 41 01000001   129 81 10000001   193 c1 11000001
2 2 00000010   66 42 01000010   130 82 10000010   194 c2 11000010
3 3 00000011   67 43 01000011   131 83 10000011   195 c3 11000011
4 4 00000100   68 44 01000100   132 84 10000100   196 c4 11000100
5 5 00000101   69 45 01000101   133 85 10000101   197 c5 11000101
6 6 00000110   70 46 01000110   134 86 10000110   198 c6 11000110
7 7 00000111   71 47 01000111   135 87 10000111   199 c7 11000111
8 8 00001000   72 48 01001000   136 88 10001000   200 c8 11001000
9 9 00001001   73 49 01001001   137 89 10001001   201 c9 11001001
10 a 00001010   74 4a 01001010   138 8a 10001010   202 ca 11001010
11 b 00001011   75 4b 01001011   139 8b 10001011   203 cb 11001011
12 c 00001100   76 4c 01001100   140 8c 10001100   204 cc 11001100
13 d 00001101   77 4d 01001101   141 8d 10001101   205 cd 11001101
14 e 00001110   78 4e 01001110   142 8e 10001110   206 ce 11001110
15 f 00001111   79 4f 01001111   143 8f 10001111   207 cf 11001111
16 10 00010000   80 50 01010000   144 90 10010000   208 d0 11010000
17 11 00010001   81 51 01010001   145 91 10010001   209 d1 11010001
18 12 00010010   82 52 01010010   146 92 10010010   210 d2 11010010
19 13 00010011   83 53 01010011   147 93 10010011   211 d3 11010011
20 14 00010100   84 54 01010100   148 94 10010100   212 d4 11010100
21 15 00010101   85 55 01010101   149 95 10010101   213 d5 11010101
22 16 00010110   86 56 01010110   150 96 10010110   214 d6 11010110
23 17 00010111   87 57 01010111   151 97 10010111   215 d7 11010111
24 18 00011000   88 58 01011000   152 98 10011000   216 d8 11011000
25 19 00011001   89 59 01011001   153 99 10011001   217 d9 11011001
26 1a 00011010   90 5a 01011010   154 9a 10011010   218 da 11011010
27 1b 00011011   91 5b 01011011   155 9b 10011011   219 db 11011011
28 1c 00011100   92 5c 01011100   156 9c 10011100   220 dc 11011100
29 1d 00011101   93 5d 01011101   157 9d 10011101   221 dd 11011101
30 1e 00011110   94 5e 01011110   158 9e 10011110   222 de 11011110
31 1f 00011111   95 5f 01011111   159 9f 10011111   223 df 11011111
32 20 00100000   96 60 01100000   160 a0 10100000   224 e0 11100000
33 21 00100001   97 61 01100001   161 a1 10100001   225 e1 11100001
34 22 00100010   98 62 01100010   162 a2 10100010   226 e2 11100010
35 23 00100011   99 63 01100011   163 a3 10100011   227 e3 11100011
36 24 00100100   100 64 01100100   164 a4 10100100   228 e4 11100100
37 25 00100101   101 65 01100101   165 a5 10100101   229 e5 11100101
38 26 00100110   102 66 01100110   166 a6 10100110   230 e6 11100110
39 27 00100111   103 67 01100111   167 a7 10100111   231 e7 11100111
40 28 00101000   104 68 01101000   168 a8 10101000   232 e8 11101000
41 29 00101001   105 69 01101001   169 a9 10101001   233 e9 11101001
42 2a 00101010   106 6a 01101010   170 aa 10101010   234 ea 11101010
43 2b 00101011   107 6b 01101011   171 ab 10101011   235 eb 11101011
44 2c 00101100   108 6c 01101100   172 ac 10101100   236 ec 11101100
45 2d 00101101   109 6d 01101101   173 ad 10101101   237 ed 11101101
46 2e 00101110   110 6e 01101110   174 ae 10101110   238 ee 11101110
47 2f 00101111   111 6f 01101111   175 af 10101111   239 ef 11101111
48 30 00110000   112 70 01110000   176 b0 10110000   240 f0 11110000
49 31 00110001   113 71 01110001   177 b1 10110001   241 f1 11110001
50 32 00110010   114 72 01110010   178 b2 10110010   242 f2 11110010
51 33 00110011   115 73 01110011   179 b3 10110011   243 f3 11110011
52 34 00110100   116 74 01110100   180 b4 10110100   244 f4 11110100
53 35 00110101   117 75 01110101   181 b5 10110101   245 f5 11110101
54 36 00110110   118 76 01110110   182 b6 10110110   246 f6 11110110
55 37 00110111   119 77 01110111   183 b7 10110111   247 f7 11110111
56 38 00111000   120 78 01111000   184 b8 10111000   248 f8 11111000
57 39 00111001   121 79 01111001   185 b9 10111001   249 f9 11111001
58 3a 00111010   122 7a 01111010   186 ba 10111010   250 fa 11111010
59 3b 00111011   123 7b 01111011   187 bb 10111011   251 fb 11111011
60 3c 00111100   124 7c 01111100   188 bc 10111100   252 fc 11111100
61 3d 00111101   125 7d 01111101   189 bd 10111101   253 fd 11111101
62 3e 00111110   126 7e 01111110   190 be 10111110   254 fe 11111110
63 3f 00111111   127 7f 01111111   191 bf 10111111   255 ff 11111111

Quiet Fans on Dell PowerEdge Servers Via IPMI

Link: https://blog.hessindustria.com/quiet-fans-on-dell-poweredge-servers-via-ipmi/

JOSHUA HESS • 3 MIN READ
Quiet Fans on Dell PowerEdge Servers Via IPMI

Intro

You just got your new shiny Dell PowerEdge server all set up, but you are getting annoyed by the constant fan ramping up and down or the louder than desired whining of fans. Or worse yet, you just added an "unsupported" GPU or another PCIe device to your PowerEdge and now the fans are ripping at near 100% and screaming away like a jet engine. Fear not! This quick tutorial will get your server to STFU in no time!

When I first got into servers and HomeLab years ago, the standard and accepted way to quiet down PowerEdge servers was to add a resistor in series with each of the fans. Luckily, the newer generations of PowerEdge servers since then have a standard IPMI interface and some known commands to manually control the fan speed. No resistors or soldering irons required this time, nice.

Step By Step

Before We Begin

Before starting, you'll need to:

  1. Have access to a Linux machine (Ubuntu recommended)
  2. Know your Dell iDRAC IP address and login credentials
  3. Make sure IPMI Over LAN option is enabled in iDRAC as shown below

Install IPMI Tool

The first thing to do is install IPMI Tool. To do so, open a terminal and run the following command:

sudo apt install ipmitool

This is what we will use to send raw IPMI commands to the server.

Enter Manual Fan Control Mode

To put the fan speed controller into manual or fixed speed mode, run the following command with your own iDRAC IP and credentials:

ipmitool -I lanplus -H <ip> -U <user> -P <pass> raw 0x30 0x30 0x01 0x00

Set Static Fan Speed

To set a static fan speed run the following command with your own iDRAC IP, credentials, and fan speed as a percentage (0-100) in hexadecimal format (0x00-0x64).

ipmitool -I lanplus -H <ip> -U <user> -P <pass> raw 0x30 0x30 0x02 0xFF <speed>

For example, setting the speed to 10% (0xA) would be as follows:

ipmitool -I lanplus -H <ip> -U <user> -P <pass> raw 0x30 0x30 0x02 0xFF 0xA

NOTE: The static fan speed commands only work if the speed controller is set in manual mode as set above. It will return to automatic mode upon an iDRAC reset.

Maximizing Sound Reduction

It may be counterintuitive, but to minimize sound level, lower fan speed isn't always better. In my case, with the R730 server, I found that the optimum fan speed for minimum perceived sound was 11% fan speed. I found that the lower speeds had a lower frequency sound which was actually more noticeable than the higher frequency whine at slightly higher speeds. It's worth sweeping through the speeds on your setup and finding the highest speed with an acceptable sound level.

Double Check Your Temps

The downside to setting the fans to a static speed is, of course, reduced cooling performance and no reaction during high load. In my case, this was not an issue since my server never goes near full load and my ambient temperatures are consistently quite low. However, it is worth double-checking your temperatures and running some synthetic loads to see what the worse case would look like. You can find most of the critical temperatures exposed in the iDRAC web interface.

Final Thoughts

This method worked great for me and I have used this on all my servers in my home lab. I took this one step further and made a bash script that I can call at a moment's notice if the settings get reset. This can happen if the iDRAC is reset in any way (FW update, SW reset, sustained power outage). You can see the simple bash script below for reference:

#!/bin/bash
ipmitool -I lanplus -H <ip> -U <user> -P <pass> raw 0x30 0x30  0x01 0x00
ipmitool -I lanplus -H <ip> -U <user> -P <pass> raw 0x30 0x30 0x02 0xFF 0xB
echo Server STFU done!

That's it! I hope this was helpful and saves some headaches and bleeding ears for fellow PowerEdge owners.

Dell Fan Noise Control - Silence Your Poweredge

Link: https://www.reddit.com/r/homelab/comments/7xqb11/dell_fan_noise_control_silence_your_poweredge/

Hey,

there were some threads complaining about server noise in this sub the last days. I did some research on how to manually controlling the PowerEdge fans.

I read threads on this sub and other boards and found a lot of commands. These are already widely known, but I wanted to list them again. Maybe they will help others.

I tested them with my R210II, T620 and T330. So basically a 11th, 12th and 13th generation PowerEdge. Although you might have to change the sensors' names accordingly.

### Dell Fan Control Commands
#
#
# Hex to Decimal: http://www.hexadecimaldictionary.com/hexadecimal/0x1a/
#
#
# print temps and fans rpms
ipmitool -I lanplus -H <iDRAC-IP> -U <iDRAC-USER> -P <iDRAC-PASSWORD> sensor reading "Ambient Temp" "FAN 1 RPM" "FAN 2 RPM" "FAN 3 RPM"
#
# print fan info
ipmitool -I lanplus -H <iDRAC-IP> -U <iDRAC-USER> -P <iDRAC-PASSWORD> sdr get "FAN 1 RPM" "FAN 2 RPM" "FAN 3 RPM"
#
# enable manual/static fan control
ipmitool -I lanplus -H <iDRAC-IP> -U <iDRAC-USER> -P <iDRAC-PASSWORD> raw 0x30 0x30 0x01 0x00
#
# disable manual/static fan control
ipmitool -I lanplus -H <iDRAC-IP> -U <iDRAC-USER> -P <iDRAC-PASSWORD> raw 0x30 0x30 0x01 0x01
#
# set fan speed to 0 rpm
ipmitool -I lanplus -H <iDRAC-IP> -U <iDRAC-USER> -P <iDRAC-PASSWORD> raw 0x30 0x30 0x02 0xff 0x00
#
# set fan speed to 20 %
ipmitool -I lanplus -H <iDRAC-IP> -U <iDRAC-USER> -P <iDRAC-PASSWORD> raw 0x30 0x30 0x02 0xff 0x14
#
# set fan speed to 30 %
ipmitool -I lanplus -H <iDRAC-IP> -U <iDRAC-USER> -P <iDRAC-PASSWORD> raw 0x30 0x30 0x02 0xff 0x1e
#
# set fan speed to 100 %
ipmitool -I lanplus -H <iDRAC-IP> -U <iDRAC-USER> -P <iDRAC-PASSWORD> raw 0x30 0x30 0x02 0xff 0x64

I wrote a small script, that will check the servers temperature periodically (crontab) and disables or enables the dynamic fan control based on a temperature threshold. You may have to adjust the time frame depending on your server usage.

#!/bin/bash
#
# crontab -l > mycron
# echo "#" >> mycron
# echo "# At every 2nd minute" >> mycron
# echo "*/2 * * * * /bin/bash /scripts/dell_ipmi_fan_control.sh >> /tmp/cron.log" >> mycron
# crontab mycron
# rm mycron
# chmod +x /scripts/dell_ipmi_fan_control.sh
#
DATE=$(date +%Y-%m-%d-%H%M%S)
echo "" && echo "" && echo "" && echo "" && echo ""
echo "$DATE"
#
IDRACIP="<iDRAC-IP>"
IDRACUSER="<iDRAC-USER>"
IDRACPASSWORD="<iDRAC-PASSWORD>"
STATICSPEEDBASE16="0x0f"
SENSORNAME="Ambient"
TEMPTHRESHOLD="29"
#
T=$(ipmitool -I lanplus -H $IDRACIP -U $IDRACUSER -P $IDRACPASSWORD sdr type temperature | grep $SENSORNAME | cut -d"|" -f5 | cut -d" " -f2)
# T=$(ipmitool -I lanplus -H $IDRACIP2 -U $IDRACUSER -P $IDRACPASSWORD sdr type temperature | grep $SENSORNAME2 | cut -d"|" -f5 | cut -d" " -f2 | grep -v "Disabled")
echo "$IDRACIP: -- current temperature --"
echo "$T"
#
if [[ $T > $TEMPTHRESHOLD ]]
  then
    echo "--> enable dynamic fan control"
    ipmitool -I lanplus -H $IDRACIP -U $IDRACUSER -P $IDRACPASSWORD raw 0x30 0x30 0x01 0x01
  else
    echo "--> disable dynamic fan control"
    ipmitool -I lanplus -H $IDRACIP -U $IDRACUSER -P $IDRACPASSWORD raw 0x30 0x30 0x01 0x00
    echo "--> set static fan speed"
    ipmitool -I lanplus -H $IDRACIP -U $IDRACUSER -P $IDRACPASSWORD raw 0x30 0x30 0x02 0xff $STATICSPEEDBASE16
fi

brezlord/iDRAC7_fan_control

Link: https://github.com/brezlord/iDRAC7_fan_control

A simple script to control fan speeds on Dell generation 12 PowerEdge servers.
If the monitored temperature is above 35deg C enable iDRAC dynamic control and exit program.
If monitored temperature is below 35deg C set fan control to manual and set fan speed to predetermined value.
The tower servers T320, T420 & T620 inlet temperature sensor is after the HDDs so temperature will be higher than the ambient temperature.

As you may have discovered, when you cross flash a Dell H310 raid controller to IT mode and as soon as the iDRAC detects that a drive has been inserted the fans spin up and get loud even when the ambient temperature is low, say 20deg C. This is as designed by Dell, which sucks.

Directly from page 30 PowerEdge T320 Technical Guide

RAID Setup with PERC H310: A system configured as non-RAID has a higher noise level than a system configured as RAID. With non-RAID, the temperature of the hard disk drives is not monitored, which causes the fan speed to be higher to ensure sufficient cooling resulting in higher noise level

There is no warranty provided and you use this scrip at your own risk. Please ensure you review the temperature set points for your use case to ensure your hard drives are kept at your desired temperature, change the set points as needed. I suggest that you trend you HDD temps to validate your setting and that you setup alarms in TrueNAS so that you get warnings if the HDD temperatures get to high.

I use this script on a Dell T320 running TrueNAS 12 and it work great. The server lives in my garage, which in Western Australia can get into the low 40s deg C.

You will need to create a data set for the script to reside in and make it executable, this assumes that you have a pool called tank and a dataset named fan_control.

chmod +x /mnt/tank/fan_control/fan_control.sh

Make sure you set the below variables;

IDRAC_IP="IP address of iDRAC"
IDRAC_USER="user"
IDRAC_PASSWORD="passowrd"

There are multiple temperature sensors that you can choose to use. Just uncomment the one you would like the script to monitor. Not all temperature sensors are available in some models. You can run the following command from the shel to list all of the available temperature sensors on you generation 12 Dell sever.

ipmitool -I lanplus -H <ip address> -U <username> -P <password> sdr type temperature

Output from a Dell T320

Inlet Temp       | 04h | ok  |  7.1 | 23 degrees C
Temp             | 0Eh | ok  |  3.1 | 33 degrees C
Temp             | 0Fh | ns  |  3.2 | Disabled

Output from a Dell R720

Inlet Temp       | 04h | ok  |  7.1 | 20 degrees C
Exhaust Temp     | 01h | ok  |  7.1 | 31 degrees C
Temp             | 0Eh | ok  |  3.1 | 50 degrees C
Temp             | 0Fh | ok  |  3.2 | 45 degrees C

You will need to enable IPMI in the iDRAC and the user must have administrator privileges.

You can test the script by running ./fan_control.sh from the scrips directory. If it is working you should get an output similar to this;

Date 04-09-2020 10:24:52
--> iDRAC IP Address: 192.168.40.140
--> Current Inlet Temp: 22
--> Temperature is below 35deg C
--> Disabled dynamic fan control

--> Setting fan speed to 20%

Once you have verified the script is working you can set it to run every 5 minutes via cron.

On TrueNAS Core this can be found under the Tasks menu --> Cron Jobs.

On TrueNAS Scale this can be found under the System menu --> Advanced Cron Jobs tab.

Systemd

Running as a service

Once the service is up and running, the temprature will be checked every INTERVAL_SEC seconds. Fan speed will change if the temprature has changed and warrants a speed change.

There is a delay before the temprature monitoring begins and is controlled by the variable INITIAL_START_DELAY_SEC. After this initial delay the time between checks is governed by the INTERVAL_SEC value.

When the server is shutdown/rebooted or started, the manual control is reset, this is to avoid any left over low fan speeds from previous power outage/powerdown/shutdown etc.

The files required to run the service are fan_control_dyn.sh fancontrol.service

Simply execute the following to get the service set up.

sudo cp fan_control_dyn.sh /usr/local/sbin/fan_control_dyn.sh
sudo chmod 755 /usr/local/sbin/fan_control_dyn.sh
sudo cp fancontrol.service /etc/systemd/system/fancontrol.service
sudo systemctl enable fancontrol.service
sudo systemctl start fancontrol.service

If you are using a location other than /usr/local/sbin/fan_control_dyn.sh then you'll need to modify the location in the fancontrol.service file as well

ExecStart=/MY_ABSOLUTE_PATH/fan_control_dyn.sh

Dell PowerEdge T620 : How To Reduce FAN Speed with IPMI

Link: https://std.rocks/dell_t620_fanspeed.html

 

Dell logoDell PowerEdge T620

Recently I had to replace Dell certified mechanical hard drives with uncertified SSD drives on a PowerEdge T620 server and was unpleasantly suprised to find that the fans were spinning noisly when inserted.

After quick research, I discovered that it was a known issue and that Dell wasn't able to offer any solution…

Thanks to god/internet, I also found a post where a user has been able to control the fan speed with the ipmitool. So, big thanks to, tatmde.

I will simply post here what I have done in my situation.

⚠️ Be advised that changing the fan speed may result in overheating and damage to the components. ⚠️

Enable IPMI over LAN

To control the FANs speed via network we need to enable IPMI over LAN from IDRAC.

⚠️ Enable IPMI over LAN could be considered as security issue cause a remote station would have the capability to control the system's power state as well as being able to gather certain platform information. ⚠️

  • Connect to your iDRAC, go to iDRAC Settings > Network and enable IPMI Over LAN :
Dell IDRAC | enable IPMI

ipmitool utility

Installing on GNU/Linux

Install ipmitool software. This utility will allow us to communicate with the IPMI.

  • From a Debian you could use this command to install ipmitool :
root@host:~# apt-get install ipmitool

Using ipmitool

Check temperature

  • Get temperature informations :
user@host:~$ ipmitool -I lanplus -H <iDRAC IP> -U <iDRAC user> -P <iDRAC password> sdr type temperature
Inlet Temp       | 04h | ok  |  7.1 | 21 degrees C
Temp             | 0Eh | ok  |  3.1 | 29 degrees C
Temp             | 0Fh | ok  |  3.2 | 35 degrees C
  • We can see the corresponding values in iDRAC :
Dell IDRAC | temperature probes

Control FAN Speed

  • To disable manual/static fan control (auto mode) :
user@host:~$ ipmitool -I lanplus -H <iDRAC IP> -U <iDRAC user> -P <iDRAC password> raw 0x30 0x30 0x01 0x01
  • To enable manual/static fan control (manual mode) :
user@host:~$ ipmitool -I lanplus -H <iDRAC IP> -U <iDRAC user> -P <iDRAC password> raw 0x30 0x30 0x01 0x00
  • Get current Fan speed :
user@host:~$ ipmitool -I lanplus -H <iDRAC IP> -U <iDRAC user> -P <iDRAC password> sdr get Fan1 Fan2 | grep "Sensor Reading"
 Sensor Reading        : 1560 (+/- 120) RPM
 Sensor Reading        : 1560 (+/- 120) RPM
  • Set Fan speed at 1320 RPM (16%) :
user@host:~$ ipmitool -I lanplus -H <iDRAC IP> -U <iDRAC user> -P <iDRAC password> raw 0x30 0x30 0x02 0xff 0x10
  • Set Fan speed at 1560 RPM (20%) :
user@host:~$ ipmitool -I lanplus -H <iDRAC IP> -U <iDRAC user> -P <iDRAC password> raw 0x30 0x30 0x02 0xff 0x14
  • Set Fan speed at 2040 RPM (30%) :
user@host:~$ ipmitool -I lanplus -H <iDRAC IP> -U <iDRAC user> -P <iDRAC password> raw 0x30 0x30 0x02 0xff 0x1e
  • Set Fan speed at 3000 RPM (50%) :
user@host:~$ ipmitool -I lanplus -H <iDRAC IP> -U <iDRAC user> -P <iDRAC password> raw 0x30 0x30 0x02 0xff 0x32
  • Set Fan speed at 5040 RPM (100%) :
user@host:~$ ipmitool -I lanplus -H <iDRAC IP> -U <iDRAC user> -P <iDRAC password> raw 0x30 0x30 0x02 0xff 0x64

Create ipmi service

I got mad and decided to create a service that automatically regulates the speed of the fans.

I will detail here the different steps to set it up.

Note : This script is adapted to my own configuration

Create system account

  • For security reason I decided to run the service with system account. So let's create a system account :
root@host:~# useradd --system --no-create-home ipmiservice
  • Create log folder :
root@host:~# mkdir /var/log/ipmiservice
root@host:~# chown -R ipmiservice /var/log/ipmiservice

Create bash script

  • Create /usr/local/sbin/ipmiservice.sh file :
root@host:~# touch /usr/local/sbin/ipmiservice.sh
root@host:~# chown ipmiservice: /usr/local/sbin/ipmiservice.sh
root@host:~# chmod +x /usr/local/sbin/ipmiservice.sh
  • /usr/local/sbin/ipmiservice.sh :
#!/bin/bash 

#Stops script on errors, unset variables or failing pipeline 
set -euo pipefail

#variables definitions 
LOG=/var/log/ipmiservice/ipmi.log
IP="192.168.1.10"
PASSWORD='STp@ssw0rd!'

#functions 
##Set Fan Speed, accept one argument to set speed 
FanSpeed()
{
        ipmitool -I lanplus -H "$IP" -U root -P "$PASSWORD" raw 0x30 0x30 0x02 $1
}
##Get Temp values 
GetValues()
{
        #Get motherboard, cpu1 and cpu2 temperature 
        OUTPUT=$(/usr/bin/ipmitool -I lanplus -H "$IP" -U root -P "$PASSWORD" sdr type temperature | sed -e 's/Temp\(.*0Eh\)/Cpu1\1/' -e 's/Temp\(.*0Fh\)/Cpu2\1/')
        #Extract motherboard temp 
        SB=$(echo $OUTPUT| awk -F'|' '{ print $5 $9 $13 }' | awk '{ print $1 }')
        #Extract cpu1 temp 
        CPU1=$(echo $OUTPUT| awk -F'|' '{ print $5 $9 $13 }' | awk '{ print $5 }')
        #Extract cpu2 temp 
        CPU2=$(echo $OUTPUT| awk -F'|' '{ print $5 $9 $13 }' | awk '{ print $9 }')
        #motherboard+cpu1+cpu2 temp 
        LOG_TOTAL=$(($SB+$CPU1+$CPU2))
        #Get Fan1 speed 
        FANS=$(ipmitool -I lanplus -H "$IP" -U root -P "$PASSWORD" sensor reading Fan1 | awk '{ print $3 }')
}

#set manual mode 
ipmitool -I lanplus -H "$IP" -U root -P "$PASSWORD" raw 0x30 0x30 0x01 0x00

GetValues
echo "$(date "+%Y-%m-%d %H:%M:%S")" "MB : $SB | CPU1 : $CPU1 | CPU2 : $CPU2 | LOG_TOTAL : $LOG_TOTAL"

while :
do
        if [ "$LOG_TOTAL" -le 100 ] && [ $FANS -eq 1440 ]; then
                echo "$(date "+%Y-%m-%d %H:%M:%S")" "FAN speed : 1440, don't do anything" | tee -a "$LOG"
        elif [ "$LOG_TOTAL" -le 100 ] && [ $FANS -ne 1440 ]; then
                FanSpeed "0xff 0x12" #Set speed to 1440 
                echo "$(date "+%Y-%m-%d %H:%M:%S")" "Set speed to 1440" | tee -a "$LOG"
        elif [ "$LOG_TOTAL" -gt 100 ] && [ "$LOG_TOTAL" -le 105 ] && [ $FANS -ne 1560 ]; then
                FanSpeed "0xff 0x14" #Set speed to 1560 
                echo "$(date "+%Y-%m-%d %H:%M:%S")" "Set speed to 1560" | tee -a "$LOG"
        elif [ "$LOG_TOTAL" -gt 105 ] && [ "$LOG_TOTAL" -le 115 ] && [ $FANS -ne 2040 ]; then
                FanSpeed "0xff 0x1e" #Set speed to 2040 
                echo "$(date "+%Y-%m-%d %H:%M:%S")" "Set speed to 2040" | tee -a "$LOG"
        elif [ "$LOG_TOTAL" -gt 115 ] && [ "$LOG_TOTAL" -le 130 ] && [ $FANS -ne 3000 ]; then
                FanSpeed "0xff 0x32" #Set speed to 3000 
                echo "$(date "+%Y-%m-%d %H:%M:%S")" "Set speed to 3000" | tee -a "$LOG"
        elif [ "$LOG_TOTAL" -gt 130 ] && [ $FANS -ne 5040 ]; then
                FanSpeed "0xff 0x64" #Set speed to 5040 
                echo "$(date "+%Y-%m-%d %H:%M:%S")" "Set speed to 5040" | tee -a "$LOG"
        fi
        sleep 30s
        GetValues
        echo "$(date "+%Y-%m-%d %H:%M:%S")" "MB : $SB | CPU1 : $CPU1 | CPU2 : $CPU2 | TEMP TOTAL : $LOG_TOTAL" >> "$LOG"
        echo "$(date "+%Y-%m-%d %H:%M:%S")" "FAN speed : $FANS" | tee -a "$LOG"
done

Create systemd service

Now we will create a systemd service.

  • Create systemd service :
root@host:~# vim /etc/systemd/system/ipmi.service
[Unit]
Description=ipmi t620 fan control
After=network.target

[Service]
Type=simple
User=ipmiservice
Group=ipmiservice
WorkingDirectory=/usr/local/sbin/
ExecStart=/usr/local/sbin/ipmiservice.sh
Restart=always

[Install]
WantedBy=multi-user.target
  • Enable systemd service :
root@host:~# systemctl enable ipmi.service
  • Start systemd service :
root@host:~# systemctl start ipmi.service
  • Check logs output :
root@host:~# tail -f /var/log/ipmiservice/ipmi.log
2021-05-09 15:16:57 FAN speed : 1440, don't do anything
2021-05-09 15:17:32 MB : 22 | CPU1 : 37 | CPU2 : 40 | TEMP TOTAL : 99
2021-05-09 15:17:32 FAN speed : 1440, don't do anything
2021-05-09 15:18:04 MB : 22 | CPU1 : 38 | CPU2 : 40 | TEMP TOTAL : 100
2021-05-09 15:18:04 FAN speed : 1440, don't do anything
2021-05-09 15:18:36 MB : 22 | CPU1 : 39 | CPU2 : 40 | TEMP TOTAL : 101
2021-05-09 15:18:36 FAN speed : 1440, don't do anything
2021-05-09 15:18:37 Set speed to 1560
2021-05-09 15:19:09 MB : 22 | CPU1 : 38 | CPU2 : 40 | TEMP TOTAL : 100
2021-05-09 15:19:09 FAN speed : 1560

dell-idrac-6-fan-speed-control-service

Link: hippyod/dell-idrac-6-or-7-fan-speed-control-service: Simple service to monitor ambient temp of Dell PowerEdge R610 or R720 (iDRAC 6 or 7) and set fan speed manually and appropiately via IPMI (github.com)

git clone https://github.com/hippyod/dell-idrac-6-or-7-fan-speed-control-service.git

Simple service to monitor ambient temp of Dell PowerEdge R610 or R720 (iDRAC 6 & 7) and set fan speed manually and appropiately via IPMI.

This service will start on boot, monitor the average core CPU temperature every 30s, and adjust fan speed over LAN via the ipmitool based on a rolling average of the average CPU temperatures every two minutes; i.e. ${AVG_CPU_TEMPS_ARRAY_SUM}/4

[NOTE: if you don't understand the instructions, that's what internet search is for.]

  1. Make sure ipmitool and lm_sensors is installed; e.g.
    sudo dnf install ipmitool lm_sensors
  2. Make sure iDRAC is enabled over lan from the host OS
  3. Get the IP address of iDRAC from the LCD menus at the front of the screen, or during boot
  4. Enter the iDRAC IP address, username, and password in fan-speed-control.sh
    1. We suggest making the IP address static
    2. We suggest changing the root/calvin default username and password on iDRAC first if you haven't already done so
    3. If the fan isn't under control by the time your login screen comes up, check the IP address first
  5. sudo sensors-detect
    1. Hit enter all the way through until it asks you to write out the results of the probe unless you know what you're doing
  6. sudo cp fan-speed-control.sh /usr/local/bin/
  7. sudo cp fan-speed-control.service /usr/lib/systemd/system/
  8. sudo systemctl enable /usr/lib/systemd/system/fan-speed-control.service
  9. sudo systemctl start fan-speed-control.service

The service will start and run every 5 seconds until a proper temperature average is calculated, and then every 30 seconds (default), adjusting the fan speed appropiately as the average core CPU temperature rises. Minimum rotation is set to 15%. Once the temp rises past 90% of the high CPU temperature as reported by the sensors command, it will return control to iDRAC until the core CPU average temperature falls back under 90% of the reported high. Please read through the script to understand the default settings, and to adjust the IP address of your iDRAC.

This stopped my machine (first a Dell Poweredge R610, and later a R720) from sounding like a jet engine, but it still sounds like a loud, '90's era desktop with this. Still much better and much more tolerable. Expect the fan speed to adjust somewhat regularly depending on usage and sensor sensistivity, and adjust the way the service works to your heart's desire, but see warning and disclaimer below. Occasionally the sensors may miss a beat, which will cause the script to fail. The script is designed to restart the service until fixed.

DISCLAIMER

USE AT YOUR OWN RISK!! No responsibility taken for any damage caused to your equipment as result of this script.

Original script before modification can be found and freely obtained from NoLooseEnds

REDUCE THE FAN NOISE OF THE DELL R720XD (PLUS OTHER 12TH GEN SERVERS) WITH IPMI

Link: https://blog.filegarden.net/2020/10/06/reduce-the-fan-noise-of-the-dell-r720xd-plus-other-12th-gen-servers-with-ipmi/

  

Introduction

In this guide I will be showing you how you can reduce the fan noise of the Dell Powerdge r720XD. This will probably work on the r720 and other 12th gen dell servers. To do this, we will be using IPMI to manually override the fan speed.

Requirements

In order to follow this guide, you will need the following:

Disclaimer

Make sure you keep an eye out on the temperatures of the server or else it will overheat and could cause hardware damage. If you brick your server, thats your problem!

Getting setup

Enabling IPMI

The first thing you will need to do is connect to the iDRAC interface on your dell server. You can do so by entering the IP address of the DRAC in a browser. If you are unsure on the IP address, you can find it by powering on the server, pressing F2 to enter the system setup, go to the DRAC section and find the IP somewhere in there. You then need to login. the default credentials are username root and password calvin.

Once logged in, you will need to go to Overview -> iDRAC Settings -> Network and then scroll to the IMPI Settings. You will need to make sure this is enabled.

Installing IPMI tool

First of all, check if you already have ipmitool installed. If you do, you can skip this step. If not, lets install it.

If you are on a debian based machine, you can use apt to install it. First, lets update our apt repo.

sudo apt update

Now lets install it

sudo apt install ipmitool

Controlling some fans

Enabling manual fan control

Once IPMI has been enabled, we now need to enable remote fan control. We can do so with this command. Make sure to replace the IP, username and password for your system.

ipmitool -I lanplus -H SERVERS_IP_HERE -U IDRAC_USERNAME -P 'IDRAC_PASSWORD_HERE' raw 0x30 0x30 0x01 0x00

Setting the speed

You may not have noticied a difference in the sound yet but dont worry, we can now override the current fan speed with our own. Prepare yourself! Use this command to set the fan speed to 20%.

ipmitool -I lanplus -H SERVERS_IP_HERE -U IDRAC_USERNAME -P 'IDRAC_PASSWORD_HERE' raw 0x30 0x30 0x02 0xff 0x14

If you cant hear the difference or you would like to check the current speed, you can do so via the iDRAC system. go to Overview -> Hardware -> Fans.

Custom speeds

If you want to change the speed to something other than 20%, you just need to change the value at the end from 0x14 to whatever you’d like. 0x14 is the hexadecimal value for 20. Here are some premade values for you. If your not sure how to work out hexadecimal values, check out this website.

Set fan speed to 25%

ipmitool -I lanplus -H SERVERS_IP_HERE -U IDRAC_USERNAME -P 'IDRAC_PASSWORD_HERE' raw 0x30 0x30 0x02 0xff 0x19

Set fan speed to 30%

ipmitool -I lanplus -H SERVERS_IP_HERE -U IDRAC_USERNAME -P 'IDRAC_PASSWORD_HERE' raw 0x30 0x30 0x02 0xff 0x1E

Set fan speed to 50%

ipmitool -I lanplus -H SERVERS_IP_HERE -U IDRAC_USERNAME -P 'IDRAC_PASSWORD_HERE' raw 0x30 0x30 0x02 0xff 0x32

Set fan speed to 60%

ipmitool -I lanplus -H SERVERS_IP_HERE -U IDRAC_USERNAME -P 'IDRAC_PASSWORD_HERE' raw 0x30 0x30 0x02 0xff 0x3C

Set fan speed to 100%

ipmitool -I lanplus -H SERVERS_IP_HERE -U IDRAC_USERNAME -P 'IDRAC_PASSWORD_HERE' raw 0x30 0x30 0x02 0xff 0x64

Original Author
https://back2basics.io/2020/05/reduce-the-fan-noise-of-the-dell-r720xd-plus-other-12th-gen-servers-with-ipmi/