Louwrentius

This post is about getting temperature monitoring to work with a Mac Mini running Linux.

Using Debian Lenny, out of the box, lm-sensors is not working. No sensors can be found. This is how temperature monitoring and fan speed monitoring can be made to work:

modprobe applesmc

If you run "sensors-detect" after this, and do a:

modprobe coretemp

Then "sensors" will give you ouput like this:

Mini:/sys/devices/platform# sensors

applesmc-isa-0300

Adapter: ISA adapter

Master : 2151 RPM (min = 1500 RPM)

temp1: +83.2°C

temp2: +68.0°C

Some software to control the fan speed:

http://stargate.solsys.org/mod.php?mod=faq&op=extlist&topicid=27&expand=yes#1 18

d=yes#118

If you build a NAS with many drives, it may be of interest to you which drives get hot and where they are located in the chassis. My Norco 4020 case has twenty drives in RAID 6, plus two operating system drives in RAID 1. I wrote a script that shows me the temperature of each drive, positioned in such a way that it represents the actual physical location of the drive in the chassis:

 -- 30 -- | -- 27 --
 | 26 | 27 | 28 | 25 |
 | 30 | 32 | 30 | 29 |
 | 31 | 33 | 33 | 29 |
 | 33 | 32 | 35 | 30 |
 | 32 | 34 | 35 | 31 |

In this example, you can determine that the top drives seem to stay the coolest. The center and lower drives get hotter.

If you want to use this script, you will have to change it for your own specific setup. You can get it here.

This visual representation would also be nice to identify which drive has failed and where it is located in the chassis.

I have two systems that use the w83627ehf driver for hardware monitoring. However, if this driver is installed with a regular modprobe like:

modprobe w83627ehf

The result will be:

FATAL: Error inserting w83627ehf
(/lib/modules/2.6.28-1-amd64/kernel/drivers/hwmon/w83627ehf.ko): No such
device

I had this issue with the following mainboards:

Asus P5Q-EM DO (Core 2 duo) Asus: P6T deluxe (Core 7i)

The solution is simple, as I found after googling for some time:

modprobe w83627ehf force_id=0x8860

The result:

w83627ehf-isa-0290
Adapter: ISA adapter
VCore: +0.88 V (min = +0.00 V, max = +1.74 V)
in1: +11.67 V (min = +0.00 V, max = +5.49 V) ALARM
AVCC: +3.34 V (min = +0.40 V, max = +0.03 V) ALARM
3VCC: +3.31 V (min = +1.15 V, max = +0.58 V) ALARM
in4: +1.65 V (min = +0.54 V, max = +0.22 V) ALARM
in5: +2.04 V (min = +0.71 V, max = +0.11 V) ALARM
in6: +3.79 V (min = +0.10 V, max = +2.30 V) ALARM
VSB: +3.38 V (min = +0.45 V, max = +2.43 V) ALARM
VBAT: +3.30 V (min = +0.67 V, max = +0.77 V) ALARM
in9: +0.00 V (min = +1.10 V, max = +0.57 V) ALARM
Case Fan: 0 RPM (min = 104 RPM, div = 128) ALARM
CPU Fan: 0 RPM (min = 42187 RPM, div = 32) ALARM
Aux Fan: 0 RPM (min = 162 RPM, div = 128) ALARM
fan4: 0 RPM (min = 42187 RPM, div = 32) ALARM
fan5: 0 RPM (min = 42187 RPM, div = 32) ALARM
Sys Temp: +40.0°C (high = +4.0°C, hyst = +0.0°C) ALARM sensor = thermistor
CPU Temp: +42.0°C (high = +80.0°C, hyst = +75.0°C) sensor = diode
AUX Temp: +30.5°C (high = +80.0°C, hyst = +75.0°C) sensor = thermistor
cpu0_vid: +0.000 V