Penguin Computing Relion 1900e, Technical Manual

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Relion 1900e/2900e Manual
67 Revision 1.3
7.3.10.8 Server South Bridge (SSB) Thermal Monitoring
The BMC monitors the SSB temperature. This is instantiated as an analog (threshold) IPMI thermal sensor.
7.3.10.9 Exit Air Temperature Monitoring
This sensor is only available on systems in an Intel
®
chassis. BMC synthesizes a virtual sensor to approximate
system exit air temperature for use in fan control. This is calculated based on the total power being
consumed by the system and the total volumetric air flow provided by the system fans. Each system shall be
characterized in tabular format to understand total volumetric flow versus fan speed. The BMC calculates an
average exit air temperature based on the total system power, front panel temperature, and the volumetric
system air flow (cubic feet per meter or CFM).
The Exit Air temp sensor is only available when PMBus* power supplies are installed.
7.3.10.10 Ethernet Controller Thermal Monitoring
The Intel ® Ethernet Controller I350-AM4 and Intel ® Ethernet Controller 10 Gigabit X540 support an on-die
thermal sensor. For baseboard Ethernet controllers that use these devices, the BMC will monitor the sensors
and use this data as input to the fan speed control. The BMC will instantiate an IPMI temperature sensor for
each device on the baseboard.
7.3.10.11 Memory VRD-Hot Sensor(s)
The BMC monitors memory VRD_HOT# signals. The memory VRD_HOT# signals are routed to the respective
processor MEMHOT# inputs in order to throttle the associated memory to effectively lower the temperature
of the VRD feeding that memory.
For Intel ® Server Systems supporting the Intel ® Xeon ® processor E5-2600 v3, v4 product family there are 2
memory VRD_HOT# signals per CPU slot. The BMC instantiates one discrete IPMI sensor for each memory
VRD_HOT# signal.
7.3.10.12 Add-in Module Thermal Monitoring
Some boards have dedicated slots for an IO module and/or a SAS module. For boards that support these
slots, the BMC will instantiate an IPMI temperature sensor for each slot. The modules themselves may or may
not provide a physical thermal sensor (a TMP75 device). If the BMC detects that a module is installed, it will
attempt to access the physical thermal sensor and, if found, enable the associated IPMI temperature sensor.
7.3.10.13 Processor ThermTrip
When a Processor ThermTrip occurs, the system hardware will automatically power down the server. If the
BMC detects that a ThermTrip occurred, then it will set the ThermTrip offset for the applicable processor
status sensor.
7.3.10.14 Server South Bridge (SSB) ThermTrip Monitoring
The BMC supports SSB ThermTrip monitoring that is instantiated as an IPMI discrete sensor. When a SSB
ThermTrip occurs, the system hardware will automatically power down the server and the BMC will assert
the sensor offset and log an event.
7.3.10.15 DIMM ThermTrip Monitoring
The BMC supports DIMM ThermTrip monitoring that is instantiated as one aggregate IPMI discrete sensor
per CPU. When a DIMM ThermTrip occurs, the system hardware will automatically power down the server
and the BMC will assert the sensor offset and log an event.