Please see Update 1 hereunder for an update
I would like to lower the fan speed of what I consider an optimized in terms of efficiency Dell PowerEdge 1950 Gen II having two quad core Xeon E5335 cpus and 32GB (4x8GB) of RAM running Ubuntu 16.04 lts.
On this server fans are controlled by the BMC
I use ipmitool and lm-sensors to get the readings
user@server:~$ sudo ipmitool sensor | grep Temp Temp | na | | na | na | na | na | 85.000 | 90.000 | na Temp | na | | na | na | na | na | 85.000 | 90.000 | na Temp | na | | na | na | na | na | na | na | na Temp | na | | na | na | na | na | na | na | na Ambient Temp | 19.000 | degrees C | ok | na | 3.000 | 8.000 | 42.000 | 47.000 | na CPU Temp Interf | na | discrete | na | na | na | na | na | na | na user@server:~$ sudo ipmitool sensor | grep FAN FAN MOD 1A RPM | 9375.000 | RPM | ok | na | 1575.000 | na | na | na | na FAN MOD 1B RPM | 9225.000 | RPM | ok | na | 1575.000 | na | na | na | na FAN MOD 1C RPM | 6075.000 | RPM | ok | na | 1575.000 | na | na | na | na FAN MOD 1D RPM | 6150.000 | RPM | ok | na | 1575.000 | na | na | na | na FAN MOD 2A RPM | 9675.000 | RPM | ok | na | 1575.000 | na | na | na | na FAN MOD 2B RPM | 9900.000 | RPM | ok | na | 1575.000 | na | na | na | na FAN MOD 2C RPM | 5925.000 | RPM | ok | na | 1575.000 | na | na | na | na FAN MOD 2D RPM | 6225.000 | RPM | ok | na | 1575.000 | na | na | na | na FAN MOD 3A RPM | 10425.000 | RPM | ok | na | 1575.000 | na | na | na | na FAN MOD 3B RPM | 9675.000 | RPM | ok | na | 1575.000 | na | na | na | na FAN MOD 3C RPM | 6450.000 | RPM | ok | na | 1575.000 | na | na | na | na FAN MOD 3D RPM | 6375.000 | RPM | ok | na | 1575.000 | na | na | na | na FAN MOD 4A RPM | 10050.000 | RPM | ok | na | 1575.000 | na | na | na | na FAN MOD 4B RPM | 10800.000 | RPM | ok | na | 1575.000 | na | na | na | na FAN MOD 4C RPM | 6525.000 | RPM | ok | na | 1575.000 | na | na | na | na FAN MOD 4D RPM | 6600.000 | RPM | ok | na | 1575.000 | na | na | na | na user@server:~$ sudo sensors coretemp-isa-0000 Adapter: ISA adapter Core 0: +35.0°C (high = +86.0°C, crit = +100.0°C) Core 1: +31.0°C (high = +86.0°C, crit = +100.0°C) Core 2: +31.0°C (high = +86.0°C, crit = +100.0°C) Core 3: +30.0°C (high = +86.0°C, crit = +100.0°C) coretemp-isa-0001 Adapter: ISA adapter Core 0: +32.0°C (high = +86.0°C, crit = +100.0°C) Core 1: +33.0°C (high = +86.0°C, crit = +100.0°C) Core 2: +33.0°C (high = +86.0°C, crit = +100.0°C) Core 3: +34.0°C (high = +86.0°C, crit = +100.0°C) i5k_amb-isa-0000 Adapter: ISA adapter Ch. 0 DIMM 0: +46.0°C (low = +105.0°C, high = +120.0°C) Ch. 1 DIMM 0: +44.0°C (low = +105.0°C, high = +120.0°C) Ch. 2 DIMM 0: +46.0°C (low = +105.0°C, high = +120.0°C) Ch. 3 DIMM 0: +45.0°C (low = +105.0°C, high = +120.0°C)
Whilst all cores, ram and chassis ambient temperature are optimal, the fans are still spinning fast an average of 8090 RPM and seems like the BMC is not optimizing fan control.
All firmware is updated.
How can I troubleshoot this?
Update 1
After much research I have come to notice that most probably the BMC is spinning the cooling fans at a much higher rate as it is not recongnising the brand of the RAM installed Micron MT36HTF1G72FZ-667C1D4.
Had the temporary opportunity to swap the MT36HTF1G72FZ-667C1D4 with another brand and the fans spun down to 3.5k rpm.
Is there firmware for this type of RAM please as I cannot find it on the Dell website.
