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WebDav mapped drive reports incorrect drive capacity

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Support for Windows Server 2003 ended on July 14, 2015

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Symptom
Consider the scenario with a WebDAV mapped drive on a Windows client. The drive's capacity is reported different than the actual capacity of the disk on the file server.
Cause
Research on WebDAV protocol RFCs and verification from Microsoft's product team confirmed WebDAV protocol doesn’t support querying server’s disk capacity. With this constrain of WebDAV protocol, Windows client sets WebDAV mapping drive’s capacity the same as its System Drive.  
Resolution
This is by design. A WebDAV mapped drive's capacity is set to match the client machine's System drive capacity. This means that the capacity you get from a WebDAV mapped drive is the same as your local System drive. System drive is where Windows is installed.

Example:

On a Windows client:

System drive C:\

Free disk space: 39.9 GB

Used Disk Space: 11.2 GB


WebDAV mapped drive Y:\

Free disk space: 39.9 GB

Used Disk Space: 11.2 GB

More Information
For more information about WebDAV mapped drives on Windows clients, reference http://www.iis.net/ConfigReference/system.webServer/webdav
Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use for other considerations.
Properties

Article ID: 2386902 - Last Review: 04/27/2012 01:28:00 - Revision: 3.0

Microsoft Windows Server 2003, Enterprise Edition (32-bit x86), Windows 7 Enterprise, Windows 7 Home Premium, Windows 7 Professional, Windows 7 Ultimate, Windows Vista Enterprise, Windows Vista Enterprise 64-bit Edition, Windows Vista Home Premium, Windows Vista Home Premium 64-bit Edition, Windows Vista Ultimate, Windows Vista Ultimate 64-bit Edition, Microsoft Windows XP Professional, Microsoft Windows XP Service Pack 3

  • KB2386902
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