Adjusting fan speed: Difference between revisions

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Netscout has decided to apply a Termal Profile for maximum performance which leads to maximum fan speed and the corresponding sound level of nearly 81dBA.
Netscout has decided to apply a Termal Profile for maximum performance which leads to maximum fan speed and the corresponding sound level of nearly 81dBA.


 
 


== Solution ==
== Solution ==
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The Fan Speed Setting menu is found in the iDRAC Settings menu. It is not configurable via the iDRAC Web UI.
=== Setting the fan speed ===
 
The thermal profile and fan speed can be configured via iDRAC Settings during boot or via the iDRAC Web UI.


*During BIOS boot, press <F2>&nbsp;
iDRAC Settings:
*Select '''iDRAC Settings''', then&nbsp;'''Thermal'''
*Click on the menu'''&nbsp;Cooling Options'''


The Fan Speed Offset setting allows the user to select Low Offset and High Offset.
*At boot, press '''<F2>'''&nbsp;
*Select '''iDRAC Settings''', then&nbsp;'''Thermal '''all way down the list


When the Cooling Option is set to Default, the fan speed will be set to the value calculated by the Dell Themal Controller.&nbsp;
iDRAC Web UI:


The Low Fan Speed Offset drives fan speeds to a moderate fan speed (approx. 50%), and the High Fan Speed Offset drives fan speeds close to full speed (approx. 90-100%).
*Login
*In the laft panel expand '''Overview''' > '''Hardware'''
*Select '''Fans''' in the left and '''Setup''' in the right panel


For PCIe cards with power levels beteen 15W and 75W, it is recommended that '''Fan Speed Offset Low'''&nbsp;is selected. The Sniddely analysis card has&nbsp;a maximum power rating of 25.2W.
We recommend the following settings:


*Set Fan Speed Offset to "'''Low'''"
Termal Profile: Default Thermal Profile
*Make sure to save the new setting when exiting system setup.


For cards expected to exceed 75W per PCIe Slot, fan speed offset of "High" is recommended.
Fan Speed Offset: High (+55%)
 
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Revision as of 18:20, 20 July 2018

Introduction

Starting with Dell's PowerEdge 12th generation servers, Dell has introduced a fan speed offset setting that enables fan speed to be increased and decreased. 3rd party add-in cards - such as Netscout's "Sniddely" analysis card found on TruView Packet (TVP) and TruView Appliance (TVA) - need increased fan speed to provide additional cooling.

Netscout has decided to apply a Termal Profile for maximum performance which leads to maximum fan speed and the corresponding sound level of nearly 81dBA.

 

Solution

 

 

 

Setting the fan speed

The thermal profile and fan speed can be configured via iDRAC Settings during boot or via the iDRAC Web UI.

iDRAC Settings:

  • At boot, press <F2> 
  • Select iDRAC Settings, then Thermal all way down the list

iDRAC Web UI:

  • Login
  • In the laft panel expand Overview > Hardware
  • Select Fans in the left and Setup in the right panel

We recommend the following settings:

Termal Profile: Default Thermal Profile

Fan Speed Offset: High (+55%)