SnapDrive's implementation of MMC 3.0 introduces some changes from previous versions of SnapDrive, including the introduction of a new Action pane and improved error messages.
Using MMC 3.0 Action pane
You can use the new MMC 3.0 Action pane in SnapDrive to perform all the available operations for a specific node or disk; however, the Action pane is not displayed by default on Windows Server 2003 hosts, so you must enable it manually.
Error messages in MMC 3.0
SnapDrive uses new functionality in MMC 3.0 that enables SnapDrive to notify you when you type incorrect information in a text box or field.