Kernel Resource Depletion: Volume Shadow Copy Service Update

[This topic is intended to address a specific issue called out by the Exchange Server Analyzer Tool. You should apply it only to systems that have had the Exchange Server Analyzer Tool run against them and are experiencing that specific issue. The Exchange Server Analyzer Tool, available as a free download, remotely collects configuration data from each server in the topology and automatically analyzes the data. The resulting report details important configuration issues, potential problems, and nondefault product settings. By following these recommendations, you can achieve better performance, scalability, reliability, and uptime. For more information about the tool or to download the latest versions, see "Microsoft Exchange Analyzers" at]  

Topic Last Modified: 2006-02-13

The Microsoft® Exchange Server Analyzer Tool queries the CIM_Datafile Microsoft Windows Management Instrumentation (WMI) class to verify that the Vssvc.exe file exists.

In the registry, the Exchange Server Analyzer queries to determine whether Volume Shadow Copy Service (VSS) or Virtual Disk service (VDS) is running on the Windows Server:


Additionally, the Exchange Server Analyzer reads the following registry value to determine which version of the Microsoft Windows® operating system is running on the Exchange server:

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\CurrentVersion

If the CurrentVersion value equals 5.0, the Exchange server is running on Microsoft Windows 2000 Server. If the CurrentVersion value is 5.2, the Exchange server is running on Microsoft Windows Server™ 2003.

Finally, the Exchange Server Analyzer queries the Win32_OperatingSystem Windows Management Instrumentation (WMI) class to determine the value for the ServicePackMajorVersion key. The value for the ServicePackMajorVersion key indicates which Windows service pack is installed on the computer.

The Exchange Server Analyzer displays an error if the following conditions are true:

  • Exchange Server is installed on Windows Server 2003 Service Pack 1 (SP1).

  • Volume Shadow Copy Service or Virtual Disk service is running on Windows Server 2003 SP 1.

  • The VSS update is not installed on this Exchange Server configuration.

If you apply the VSS update, issues such as kernel resource depletion will be resolved.

To fix the error

For information about best practices for using VSS with Exchange Server 2003, see Best Practices for Using Volume Shadow Copy Service with Exchange Server 2003 (