20 Intel® NetStructure™ MPCHC5525 System Master Processor Board IPMI Reference Dri ver User’s Guide
Preparing Software for IPMI Usage
3.3 Sensor Data Records
For each sensor attached to an IPMI controller in a system you need SDRs. SDRs for sensors on
Force CPU boards are provided by Force Computers. SDRs for sensors on third-party products
must be obtained by the respective manufacturer.

3.3.1 Obtaining SDR Settings

To obtain SDR settings (thre shold s, whethe r thre shol ds can be c hanged, whe ther a s ensor gen erate s
events etc.), the defa ult way is to write a fu nction using the IPM I command “Get Devi ce SDR” via
your operating system IPMI driver API. To obtai n only the threshold values, the default way is to
write a function using the IPMI command “Get Sensor Threshold” via your operating system IPMI
driver API.
Note: On some boards, the thresholds fo r the board temperature sensor can be cha nged. For these boards,
the upper and lower threshold values are by default set to the sensor’ s minimum/max imum readi ng
values so that events from the board te mperature sensor are not likely to occur. To generate events,
change the thresholds values. Keep in min d that the measu red sens or valu e de pends on t he sys tem’s
components and their location. For information on where the board temperature is measured on
your CPU board, refer to the CPU board’s TPS.
To obtain SDR information without having to write a function, go to http://www.intel.com/design/
servers/ipmi/tools.htm for the Intel IPMI Tool. See the IPMI Specification for more information.
3.4 Notes on Writing System Managem ent Software
For creating your own system management software you can use all IPMI commands marked as
mandatory in the IPMI Specification. For information regarding Force-specific OEM IPMI
commands, see the Intelligent Board Manage ment Unit Reference Guide (PN217328) available by
contacting Force Computers.
With your management sof tw a re and For c e -sp e cif ic O E M IP MI co mm ands, you:
•Can check status of board sensors (physic al sens ors suc h as t emperat ure or voltag e sen sors and
discrete sensors). In the following only the reading values of the discrete sensors are described.
•Can obtain IBMU self-test results.
•Have to check whether the IPMI controller watchdog has reset the IPMI firmware.

3.4.1 Requirements for Events

By default, the B MC only receives event messages f rom sensors atta ched to the BMC itself. To
make PMs send event message s to the BMC, you need to define the event receiver, the BMC, via
the IPMI command “Set Eve n t Re ceiver”.