Restart VSS Writers Status and Writers table example ( No reboot required )

Hi;

Writers can be tricky during backups;

Sometimes they can fail and you are required to restart the server in order to make them run again;

In order to see the status :

Run on any CMD or PowerShell console: Vssadmin list writers :

2018-11-03 12_32_08-2018-11-03 12_21_55-HELONCRSVRPMS01.png_ ‎- Paint 3D

How the writers work:

Source:

https://docs.microsoft.com/en-us/windows/desktop/vss/overview-of-processing-a-backup-under-vss

vssimpl.png

 

We will assume for example that our WMI writer is crashed / and System Crashed / IIS Config Writer;

Here is the following equivalent table for services – writers;

See I have Highlighted the required writers in order to be restarted with the PowerShell

We will run the following script to restart WMI/Crypto Service & Apphost

Restart-Service WINMGMT -force
Get-Service WINMGMT | Select-Object -expand dependentservices | Start-Service
Restart-Service CryptSvc -force
Get-Service CryptSvc | Select-Object -expand dependentservices | Start-Service
Restart-Service AppHostSvc -force
Get-Service AppHostSvc | Select-Object -expand dependentservices | Start-Service

 

List Of Writers / Equivalent 

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
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