JSI Tip 4092. Disk Manager Diagnostics (Dmdiag.exe) Command-Line Tool.

In tip 3693, I provided the link to the Disk Manager Diagnostics tool.

Microsoft Knowledge Base Article 295406 contains the following summary:

This article describes the Disk Manager Diagnostics tool (Dmdiag.exe) that is located in the Support\Tools\Support.cab folder on the Windows XP CD-ROM or in the Windows XP Resource Kit.