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Portable Media Serial Number

Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2

Service Name: WmdmPmSN

Executable Name: svchost.exe -k netsvcs

Log On As: LocalSystem

Description: The Portable Media Serial Number service retrieves the serial number of any portable music player connected to your computer. The service allows Windows Media Device Manager (WMDM) to acquire the serial number from devices so that media content can be copied securely to the device. Without the serial number, you cannot associate the content with the specific device. Thus, protected content might not be allowed to transfer to the device.

To uniquely identify portable media, many storage media manufacturers have implemented a unique serial number stored on a nonvolatile area of the storage. For example, the CompactFlash specification revision 1.3 from the CompactFlash Association (CFA) requires CompactFlash cards to have a unique serial number. Iomega Zip and Jaz disks also have unique serial numbers on them. Recently produced SmartMedia cards also have built in unique IDs. Emerging new portable media, such as MultiMediaCards (MMC), SD Memory Cards, and Sony MemoryStick, are all built with unique IDs by design.

For a portable media reader or adapter to be Windows Media–compliant, it must allow an application to retrieve media serial numbers.

In Windows 2000, this service was called WMDM PMSP Service.

If this service is stopped or disabled, protected content might not be allowed to be transferred to the device and the serial number might not be retrieved from portable media devices.

Available on: Windows Server 2003, Standard Edition; Windows Server 2003, Enterprise Edition (32-bit only)

Installed through: Default operating system installation

Startup type: Manual

Service status: Stopped

This service depends on the following system components: None

The following system components depend on this service: None

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