Windows VSS Writers and Corresponding Service Names

Oct 15, 2020
Corporate Practices

Welcome to ClubMaxSEO, the leading provider of professional SEO services in the Business and Consumer Services industry. In this comprehensive guide, we will explore the different Windows VSS writers and their corresponding service names, providing you with valuable insights and knowledge in this technical area.

Introduction to Windows VSS Writers

Windows Volume Shadow Copy Service (VSS) is an essential component in the Windows operating system that allows the creation of consistent shadow copies or snapshots of files, volumes, and even entire systems. VSS writers are software components that facilitate the shadow copy creation process by coordinating with various applications or services running on a Windows machine.

Understanding VSS Writers and Their Roles

VSS writers play a crucial role in ensuring the integrity and consistency of shadow copies. Each VSS writer corresponds to a specific application or service, responsible for quiescing or freezing its respective data to create a point-in-time snapshot. Through this, VSS writers enable efficient backups, data recovery, and other critical operations.

Available VSS Writers and Service Names

Here is a list of commonly encountered VSS writers and their corresponding service names:

  • Microsoft Exchange Writer: Exchange Replication Service
  • Microsoft SQL Server Writer: SQLWriter
  • Microsoft SharePoint Services Writer: SPWriter
  • Microsoft Hyper-V VSS Writer: vmms
  • Microsoft Windows File System Writer: Volsnap
  • Microsoft Internet Information Services (IIS) Writer: AppHostSvc
  • Microsoft Shadow Copy Optimization Writer: VSS
  • Microsoft WMI Writer: Winmgmt
  • Microsoft Registry Writer: VSS
  • Microsoft BITS Writer: BITS

Each of these writers has specific functions and interacts with its corresponding service to ensure data consistency during the shadow copy creation process. Understanding the connection between VSS writers and their service names is crucial for troubleshooting and maintaining reliable shadow copy backups.

Importance of VSS Writers in Backup and Restore Operations

VSS writers play a critical role in backup and restore operations for both individual files and entire volumes. These writers help ensure that ongoing read and write operations do not interfere with the creation of a consistent shadow copy, allowing for reliable and accurate data recovery when needed. Failure or improper functioning of VSS writers can lead to inconsistent backups and potential data loss.

Troubleshooting VSS Writer Issues

If you encounter any issues related to VSS writers, it is important to diagnose and resolve them promptly to maintain data integrity and reliable backups. Here are some common troubleshooting steps:

  1. Restart the corresponding service: In many cases, restarting the service associated with the problematic VSS writer can resolve issues.
  2. Check for software conflicts: Conflicts between different applications installed on the system can interfere with VSS writer functionality. Identify and resolve any conflicts to ensure smooth operation.
  3. Update or reinstall the application: Outdated or corrupted applications can lead to VSS writer problems. Updating or reinstalling the application may resolve these issues.
  4. Verify system resources: Lack of available disk space or insufficient system resources can impact VSS writer functionality. Ensure your system has the necessary resources to perform shadow copy operations.
  5. Review event logs: Monitor the Windows Event Viewer for any related error messages or events that may shed light on the issue. This information can be helpful for troubleshooting.

Remember, addressing VSS writer issues promptly can help you maintain reliable backups and data recovery options in critical situations.


In this comprehensive guide, we have explored the world of Windows VSS writers and their corresponding service names. Understanding the important role these writers play in the creation of consistent shadow copies is crucial for efficient backup and recovery operations. Through proper troubleshooting and maintenance, you can ensure the integrity of your data and the success of your backup strategies.

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