In Windows Server 2008 and in Windows Vista Service Pack 1 (SP1), applications or services that call the CVdsService::Reenumerate function to rescan logical unit number (LUN) objects may receive incorrect results.

For example, an application breaks a LUN object mirror, masks one plex, and then unmasks the plex to another computer. After the application performs the unmasking action, the application calls the CVdsService::Reenumerate function to rescan LUN objects. Because of this issue, the plex does not appear on the expected computer, and an exception occurs.