Activating or Deactivating the Automatic Extension of the Data Area 
The data of a database is permanently stored in the data volumes (data area). If the data area of a database is full, the database stops working.
If you have activated the automatic extension of the data area for your database, the system adds a new data volume as soon as the configured fill level of the data area is reached.
Note
You can also add data volumes manually.
More information: Adding or Deleting Data Volumes
Prerequisites
You are logged on to the database as the database system administrator or as a DBM operator with server authorization for accessing database parameters or utility sessions.
More information: Glossary, Server Permission
The maximum number of data volumes that you configured with database parameter MaxDataVolumes has not been reached yet.
A separate event task is required for this function. For this reason, make sure that the FloatingServiceTasks and PreservedEventTasks database parameters are large enough.
More information: Changing Database Parameters
If you activate the automatic extension of the data area function, the last data volume that you added must be of type FILE.
Procedure
Select the database in the explorer tree.
In the context menu of the database, choose Administration.
Open the Overview tab page.
Choose Data Area Extension.
To activate the automatic data area extension function, select Automatic Data Area Extension and choose the fill level at which you want the system to extend the data area.
To change the fill level at which the system extends the data area, choose Restart Automatic Data Area Extension and then choose the new fill level.
To deactivate the automatic data area extension function, choose Deactivate Automatic Data Area Extension.