Intel MPCMM0001 manual Fantray Properties, Retrieving the Current Cooling Level, Fantray Insertion

Fan Control and Monitoring

16.8Fantray Properties

There are also commands to retrieve the fantray’s settings. These properties are maximum cooling level, minimum cooling level and recommended cooling level. The cooling manager gets the fan speed properties by performing an IPMI get fantray properties call on the fantray. This method is defined by the PICMG 3.0 specification. The user can use these values to determine how he configures the temperature statuses.

To return the minimum cooling level that the fantray supports:

Cmmget –l fantrayN -d minimumsetting

To return the maximum cooling level that the fantray supports:

Cmmget –l fantrayN -d maximumsetting

To return the fantray’s recommended cooling level.

Cmmget –l fantrayN -d recommendedsetting

N:The number of the fan tray being addressed.

Note: Values returned are in units. These are not necessarily percentages, which have been used in versions of firmware prior to 5.2. For further information please refer to the PICMG 3.0 Specification.

16.9Retrieving the Current Cooling Level

There is a command to allow the user to get the current cooling level. This command is:

cmmget –l fantrayN –d currentfanlevel

N:The number of the fan tray being addressed.

This command will query fantrayN and return to the user it’s current cooling level. If the fantray is in fantray control mode the cooling level selected by the fantray will be returned. If the fantray is in emergencyshutdown mode “0” will be returned.

16.10Fantray Insertion

When a new fantray is installed in the shelf the Cooling Manager on the active CMM will be notified that a fantray was inserted. When the Cooling manager on the active CMM is notified of this condition it needs to determine the fantray’s control mode and it needs to populate the cooling table.

This situation also occurs when the chassis is power-cycled. In this case the each fantray in the chassis will notify the active CMM’s Cooling Manager that it has been inserted. The Cooling Manager will then read that /etc/cmm/fantray.cfg file and determine appropriate values using the following conventions.

136MPCMM0001 Chassis Management Module Software Technical Product Specification