This parameter expects values in 1024 increments (1024, 2048, 3072, etc.). If the CACHE.DSK is deleted when this INI parameter is in use, the file will be recreated the next time Notes starts, with the same maximum limit. (The default size will not apply.)
To verify that this quota has been properly set, right-click on any part of the Notes workspace and select Workspace Properties from the pop-up menu. The Workspace Properties dialog box appears. The Information tab should read "Use no more than 3 MB locally for server based design elements such as forms and sub-forms"