UCS C220 M3 fan speed problem

I recently bought a package of Cisco UCS C220 M3 chassis and now am in a test phase.

As soon as it has been unpacked, I upgraded to the last bundle HUU - 1.5 (4) 3 and applied all the updates.  It was not far behind anyway - but I wanted to test with the latest versions first.  So much easier to upgrade now rather than later :-)

For a few days, the area was quiet and fans ran at a fairly quiet speed.  Fans worked fine - but at a slow speed, and it was quite bearable.  Even after the installation of XenServer and by installing a VM guest, he continued to run quietly for a while.

However, in the last 24 hours the fan speed have passed through the roof.  The box is literally screaming now.  What is strange, is that there is almost no load on the system and the environment is cool.  Several other devices in the basket are the normal temperatures of 25-30 degrees C all about reporting.  The chassis itself is cold to the touch.  Even the MMIC reported temperatures in the 1930s.

UCS-Mmic /sensor # show temperature

Name sensor read units min. Max warning status. Warning, default min. Max failure

------------------------- -------------- ---------- ---------- ------------ ------------ ------------ ------------

P1_TEMP_SENS Normal C 34.0 / 74.0 o 79.0

P2_TEMP_SENS Normal C 34.0 / 74.0 o 79.0

Normal RISER1_INLET_TMP 35.0 C / 60.0 o 70.0

Normal RISER2_INLET_TMP 33.0 C / 60.0 o 70.0

Normal RISER1_OUTLETTMP 38.0 C / 60.0 o 70.0

Normal RISER2_OUTLETTMP 33.0 C / 60.0 o 70.0

Normal FP_TEMP_SENSOR 30.0 C / 60.0 o 70.0

Normal DDR3_P1_A1_TEMP 33.0 C / 65.0 o 85.0

DDR3_P2_E1_TEMP Normal C 32.0 / 65.0 o 85.0

PSU1_TEMP Normal 28.0 C / o 60.0 65.0

Normal PSU2_TEMP 30.0 C / o 60.0 65.0

Normal PCH_TEMP_SENS 47.0 C / o 80.0 85.0

UCS-Mmic /sensor #.

fan to see the UCS-Mmic /sensor #.

Name sensor read units min. Max warning status. Warning, default min. Max failure

-------------------- -------------------- ---------- ---------- --------------- --------------- --------------- ---------------

FAN1_TACH1 RPM 10272 Normal 1712 / 1284 o

FAN1_TACH2 RPM 9844 Normal 1712 / 1284 o

FAN2_TACH1 RPM 10272 Normal 1712 / 1284 o

FAN2_TACH2 RPM 9844 Normal 1712 / 1284 o

FAN3_TACH1 RPM 9844 Normal 1712 / 1284 o

FAN3_TACH2 RPM 9844 Normal 1712 / 1284 o

FAN4_TACH1 RPM 10272 Normal 1712 / 1284 o

FAN4_TACH2 RPM 9844 Normal 1712 / 1284 o

FAN5_TACH1 RPM 10272 Normal 1712 / 1284 o

FAN5_TACH2 RPM 9844 Normal 1712 / 1284 o

UCS-Mmic /sensor #.

UCS-Mmic /chassis # see fan-policy

Fan policy

---------------

low-power

UCS-Mmic /chassis #.

[NB: fan-policy has been set to 'Balanced', but is about to 'Low power' - but changing it made no difference.]

I saw some other assignments with prbolems similar to this which goes back some time, and they almost all referred to as upgrading to the latest firmware which has all the patches for this kind of behavior.  But in my case, I already did this.  A complete cold reboot also did not help.

Someone at - it other ideas on what could be wrong or what could be the cause?   Looks like a bug, but...

Thank you

Reuben

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Reuben,

I understand your point, your concern, but to give you a better idea, the fan speed may actually go up to 17000 RPMs, from, your server fans are still in a mid-range and for me, it only seems that the heat is probably not that actually dissipated when the door is closed. This is the reason why I mentioned our grids of series R which are tested with UCS and the door is in fact a mesh which ensures heat is out.

Note THE answers useful.

-Kenny

Tags: Cisco DataCenter

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