The SMS_G_System_History Windows Management Instrumentation (WMI) class is an SMS Provider server class, in Configuration Manager, that serves as an abstract base class representing hardware component state history for a client computer.

The following syntax is simplified from Managed Object Format (MOF) code and includes all inherited properties.

Class SMS_G_System_History : SMS_G_System
	 UInt32 GroupID;
	 UInt32 ResourceID;
	 UInt32 RevisionID;
	 DateTime TimeStamp;


The SMS_G_System_History class does not define any methods.



Data type: UInt32 Access type: Read-only Qualifiers: [key]ID of the group that distinguishes one hardware inventory instance from another within one client resource. For example, each logical disk object for a client is assigned a unique GroupID value.

Data type: UInt32 Access type: Read/WriteQualifiers: NoneSee SMS_G_System Server WMI Class.

Data type: UInt32 Access type: Read-onlyQualifiers: [key]ID that increments if the object changes after the last time inventory was taken. The highest number indicates the most recent update. Objects with the same ResourceID and GroupID values are deltas. They differ from one another by the RevisionID number.

Data type: DateTime Access type: Read-onlyQualifiers: NoneDate and time of the inventory.


History objects are created from the current hardware component object when the component has changed since the last inventory. This class represents a collection of prior hardware component states for the client.

Your application uses this class to determine the state of client hardware at any given time. Names of derived history classes are prefixed with "SMS_GEH_System_" followed by the inventoried object name. An example class name is SMS_GEH_System_ACCOUNT. Your application can use the derived classes to determine the state of a hardware component on a client at a given point in time.

Hardware history is deleted on a schedule if the Delete Aged Inventory History database maintenance task is set to true in the Configuration Manager console. You can also enable this task and set the schedule by updating the site control file. The site control item SMS_SCI_SQLTask Server WMI Class object, and the TaskName value is "Delete Aged Inventory History". For an example that updates the site control file, see Configuration Manager Site Control File.


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