Restarting services will affect production environments, please plan accordingly.
VSS Writers may be in a failed state, causing issues with backup jobs with Application Aware Image Processing enabled.
Launch an administrative command prompt and run vssadmin list writers to determine which, if any, writers are in a failed state. Locate the writer on the list, and restart the correlating service, then rerun vssadmin list writers to ensure the writer is stable.
|VSS Writer||Service Name||Service Display Name|
|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|
|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|
|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|
If the writers continue to enter a failed state after stabilizing, further investigation will be required. Please include the System and Application event logs from the VM having issues when creating a case.
Restarting the services may not always resolve failed writers, and a reboot may be required.
Please be aware that starting from September 2018 downloading updates will require an active contract for the corresponding product.