CentOS - Jul 2017 - old hardware / minimal netinstall -> CPU fan control

I have just installed CentOS 6 i386 onto an old rack server (it's gonna be a
Bacula storeage server and is a 1U 1/2 depth chassis)

I did a minimum netinstall and so far so good. However, I have one problem.  
The CPU fan is going at full speed constantly. Not a real problem apart from 
(a) it will affect the fan's lifespan and (b) it's noisy.

I've done some Googling and found some help. I've installed lm_sensors
and run

sensors-detect.

After reboot I get the following:

[root at harpo ~]# sensors
acpitz-virtual-0
Adapter: Virtual device
temp1:       +40.0?C  (crit = +75.0?C)                  

[root at harpo ~]#

which implies that it can read the CPU temp, but the fan is still going at 
full speed.  Can anyone suggest what I need to do next to enable fan speed 
control?

[root at harpo ~]# more /etc/sysconfig/lm_sensors 
# Generated by sensors-detect on Tue Jul 11 11:49:07 2017
# This file is sourced by /etc/init.d/lm_sensors and defines the modules to
# be loaded/unloaded.
#
# The format of this file is a shell script that simply defines variables:
# HWMON_MODULES for hardware monitoring driver modules, and optionally
# BUS_MODULES for any required bus driver module (for example for I2C or SPI).

HWMON_MODULES="w83627hf"

# For compatibility reasons, modules are also listed individually as variables
#    MODULE_0, MODULE_1, MODULE_2, etc.
# You should use BUS_MODULES and HWMON_MODULES instead if possible.

MODULE_0=w83627hf
[root at harpo ~]# 
-- 
Gary

On Tue, Jul 11, 2017 at 12:05:55PM +0100, Gary Stainburn
wrote:
> I have just installed CentOS 6 i386 onto an old rack server (it's gonna
be a
> Bacula storeage server and is a 1U 1/2 depth chassis)
> 
> I did a minimum netinstall and so far so good. However, I have one problem.
> The CPU fan is going at full speed constantly. Not a real problem apart
from
> (a) it will affect the fan's lifespan and (b) it's noisy.
I used to have a HP 320 generation 2 server that I used as a desktop. it
had a bunch of tiny fans that screamed like a banshee. 

it turns out that one of the RPMs they shipped with it (on CD, not actually
installed) contained a driver that toned down the fans to a soft roar.
I'm sorry to say I have no memory of what the driver was.

but if this system is from a vendor that supports Linux, they might have
some suitable driver.

good  luck!


-- 
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 .----    Fred Smith   /              
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-------------------------------- Jude 1:24,25 ---------------------------------

Fred Smith wrote:
> On Tue, Jul 11, 2017 at 12:05:55PM +0100, Gary Stainburn wrote:
>> I have just installed CentOS 6 i386 onto an old rack server (it's
gonna
>> be a Bacula storeage server and is a 1U 1/2 depth chassis)
>>
>> I did a minimum netinstall and so far so good. However, I have one
>> problem.
>> The CPU fan is going at full speed constantly. Not a real problem apart
>> from (a) it will affect the fan's lifespan and (b) it's noisy.
>
> I used to have a HP 320 generation 2 server that I used as a desktop. it
> had a bunch of tiny fans that screamed like a banshee.
>
> it turns out that one of the RPMs they shipped with it (on CD, not
> actually
> installed) contained a driver that toned down the fans to a soft roar.
> I'm sorry to say I have no memory of what the driver was.
>
> but if this system is from a vendor that supports Linux, they might have
> some suitable driver.
>
That's in the firmware. You may, or may not, be able to do something with
ipmitool, but I don't think so. Reboot, and look in system setup. It may
be under performance settings.

       mark