Intel ZT 7102 Sensor Types, Threshold-Based Sensors, Discrete Sensors, Discrete Sensor Events

Intel® NetStructureTMZT 7102 Chassis Management Module

Sensor Types

10.0Sensor Types

The CMM provides access to and can log events from different IPMI sensor types. These sensors can be threshold based sensors or discrete sensors, depending on the type of reading and events they generate. For more information on sensors and sensor types, refer to the Intelligent Platform Management Interface Specification v1.5.

10.1Threshold-Based Sensors

Threshold based sensors are sensors that generate or change an event status based on comparing a current value to a threshold value for a given hardware monitor device. Examples of threshold based sensors are temperature, voltage, and fan tachometer sensors.

10.1.1Threshold-Based Sensor Events

Threshold-based sensors generate events when a current value for a device becomes greater than or less than a given threshold value. The IPMI specification defines six thresholds that can be assigned to a given sensor. The sensor will generate an event when its current reading goes above or below any of these thresholds. The severity of the event generated depends on which threshold is crossed. These six thresholds and their associated event severity are as follows:

Upper non-recoverable---			> Critical Event
Upper critical---	>Major Event
Upper non-critical---		>Minor Event
Lower non-critical---		>Minor Event
Lower critical---	>Major Event
Lower non-recoverable---			>Critical Event

10.2Discrete Sensors

Discrete sensors are sensors that have a predefined set of states. An examples of a discrete sensor would be board presence, where a board is either present or not present.

10.2.1Discrete Sensor Events

Discrete sensors can generate events on state changes. The severity of the event is determined by the CMM. Discrete sensor events for the CMM are located in the next section, Chapter 11.0, “Health Event Strings”.

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