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AT8901
4.4.1
Sensor Data Record (SDR)
Every sensor on the Base Board is associated with a Sensor Data Record (SDR). Sensor Data
Records contain information about the sensor's identification such as sensor type, sensor
name, sensor unit. SDR also contain the configuration of a specific sensor such as thresh-
old/hystheresis and event generation capabilities that specifies sensor behaviour. Some field
of the sensor SDR are configurable through IPMI v1.5 commands and are set to built-in initial
value. The AT8902 management controller supports sensor devices and uses the IPMI dynam-
ic sensor population feature of IPMI v1.5 to merge the AMC hot swap sensor with the AT8902
sensors population. AMC hot swap events indicated by this sensor are passed to the ShMC.
Additionally, the IPMC updates the sensor population change indicator timestamp accessible
through the Get Device SDR Info command to remain compliant to IPMI v1.5.
All SDRs can be queried using Device SDR commands. Base Board sensors that have been
implemented are listed below.
Table 4-3:
AT8901 sensors
IPMI Sensor Name
IpmC Reboot
IPMI Watchdog
SEL State
IPMB0 Link State
FRU0 IPMBL State
FRU1 IPMBL State
FRU2 IPMBL State
IPMI Info-1
IPMI Info-2
FRU0 Reconfig
FRU0 FRU Agent
FRU1 FRU Agent
FRU2 FRU Agent
EventRcv ComLost
FRU0 Hot Swap
FRU1 Hot Swap
FRU2 Hot Swap
IPMC Storage Err
Temp Base Area
Icc 12v FRU0
Vcc 12v FRU0
Icc 12v FRU1
Icc 12v FRU2
Scanning Enabled Under
Unit
Power State
discrete
On/Off
discrete
On/Off
discrete
On/Off
discrete
On/Off
discrete
On/Off
discrete
On/Off
discrete
On/Off
discrete
On/Off
discrete
On/Off
discrete
On/Off
discrete
On/Off
discrete
On/Off
discrete
On/Off
discrete
On/Off
discrete
On/Off
discrete
On/Off
discrete
On/Off
discrete
On/Off
degrees C
On/Off
Amps
On
Volts
On
Amps
On
Amps
On
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Software Description
Health LED/Sensor
No change
No change
No change
No change
No change
No change
No change
No change
No change
No change
No change
No change
No change
No change
No change
No change
No change
No change
Exceeds critical threshold
Exceeds critical threshold
Exceeds critical threshold
Exceeds critical threshold
Exceeds critical threshold
AT8901 User Guide
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