List of VSS Writers and their corresponding services

If snapshot creation is failing, then a VSS writer could be in a failed state.

Check them via command line with

if a writer is in failed state, then it could help to restart the corresponding service, before restarting the whole machine.

Here is a list of the most VSS writers:

ASR Writer – VSS Volume Shadow Copy
BITS Writer – BITS Background Intelligent Transfer Service
COM+ REGDB Writer – VSS Volume Shadow Copy
DFS Replication service writer – DFSR DFS Replication
DHCP Jet Writer DHCPServer – DHCP Server
FRS Writer – NtFrs File Replication
FSRM writer srmsvc – File Server Resource Manager
Hyper-V VSS Writer – Virtual Machine Management
IIS Config Writer AppHostSvc – Application Host Helper Service
IIS Metabase Writer IISADMIN – IIS Admin Service
Microsoft Exchange Writer MSExchangeIS – Microsoft Exchange Information Store
Microsoft Hyper-V VSS Writer vmms – Hyper-V Virtual Machine Management
NPS VSS Writer – COM+ Event System
NTDS NTDS – Active Directory Domain Services
OSearch VSS Writer OSearch – Office SharePoint Server Search
OSearch14 VSS Writer OSearch14 – SharePoint Server Search 14
Registry Writer – VSS Volume Shadow Copy
Shadow Copy Optimization Writer – VSS Volume Shadow Copy
SPSearch VSS Writer SPSearch – Windows SharePoint Services Search
SPSearch4 VSS Writer SPSearch4 – SharePoint Foundation Search V4
SqlServerWriter SQLWriter – SQL Server VSS Writer
System Writer CryptSvc – Cryptographic Services
TermServLicensing TermServLicensing – Remote Desktop Licensing
WINS Jet Writer WINS – Windows Internet Name Service (WINS)
WMI Writer Winmgmt – Windows Management Instrumentation

Be careful with restarting some services, because they have dependencies to other services, which will be also restarted.

To restart a service from command line you can use the following command:

this will stop and restart the service.
If you run services.msc and double click on „SQL SERVER VSS Writer“, then you can see the service name „SQL Writer“ and „SQL Server VSS Writer“. You can use both in your command!

 

 

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