JSI Tip 9973. Extended maintenance mode functionality for cluster physical disk resources in Windows Server 2003.

Microsoft Knowledge Base Article 903650 contains the following summary:

This article describes an update to the maintenance mode feature for cluster physical disk resources in Microsoft Windows Server 2003. This update provides extended functionality when you use maintenance mode to perform administrative and maintenance tasks in a clustered environment. For example, this update lets you perform a Volume Shadow Copy Service (VSS) recovery on a disk resource without taking down all dependent resources and their services.