VSS allows backups to be taken of in-use, locked, or inaccessible files without interrupting whatever process or user is currently accessing those files. This is especially useful for databases, as it means backups can be taken while the database is active, without requiring downtime.
How to troubleshoot Microsoft Volume Shadow copy Service errors Tweet Macrium Reflect uses a Microsoft service called Volume Shadow copy Service to enable disk images to be created and files to be backed up when in use.
When VSS fails it can sometimes mean that you are unable to create a disk image or backup open files with Macrium Reflect. Macrium Reflect cannot cause VSS to fail, it simply uses the service. Any failure is caused by other software or system configuration problems and will affect every program that uses VSS.
VSS requires at least one NTFS volume to be present and online for it to operate without one you will receive the error: VSS is a copy-on-write driver that intercepts disk writes before they actually happen.
The current contents of the disk are written to a shadow copy buffer before the write takes place. This enables a disk image to represent an exact point in time and not be affected by disk write activity during image creation.
How do I know that VSS has failed? When VSS fails there will usually be an indication in the image or backup log file. Additionally, in version 5, the main VSS log can be seen as an option under the log view: The final addition to version 5 is the ability to send these logs via email but only if you are using the Macrium Reflect email component.
Right click the log entry and select 'Send backup logs via email'. You will generally see 'Failed to Create Volume Snapshot' followed by a hex result code. You may also see: This may be associated with a 'VolSnap' error in your Windows logs. VSS uses writer components to ensure that the file system is in a stable state when creating your disk image.
For example, SQL database writers ensure that all transactions to databases are complete before allowing the shadow copy service to continue.
This will list all your VSS writers with their current state and last error.
Link to instructions on creating elevated command prompt at bottom of tutorial. Copyright c Microsoft Corporation.Failed Backup VSS Writer - Timed Out I am getting started with Backup Exec and am having trouble backing up one of my servers.
It is the server that runs backup ashio-midori.coms: 5. BITS Writer - BITS Background Intelligent Transfer Service COM+ REGDB Writer - VSS Volume Shadow Copy DFS Replication service writer - DFSR DFS Replication.
May 01, · VSS writer and backup issues. by Jeremy5 on Background Intelligent Transfer Service COM+ REGDB Writer VSS Volume Shadow Copy IIS Config Writer AppHostSvc Application Host Helper Service.
Apr 27, · Hello fellow teckies. I'm having this problem when backing up with Symantec Backup Exec 11d where it generates errors about not being able to backup VSS sections on the C drive. For example, SQL database writers ensure that all transactions to databases are complete before allowing the shadow copy service to continue.
Windows includes a VSS administration program that can list the status of all VSS Writers you have on your system. Background This article describes how to resolve VSS Writer errors without rebooting Windows.
Here are the scenarios in which you'd want.