Hi All,
I am running Hyper V host on Win Server 2012 R2 with mixed guest VMs (2008, 2012). We keep facing a VSS issue as stated in the subject which leading to have failed Backup got he VMs through Windows Backup or even VERITAS Backup Exec.
When restarting the host or vmms.exe service, Hyper-V VSS Writer state becomes stable with no error and Backup job will run successfully.
I found below event in event viewer after running a Backup job from Backup Exec :
Log Name: Application
Source: VSS
Date: 10/10/2017 10:17:27 AM
Event ID: 8229
Task Category: None
Level: Warning
Keywords: Classic
User: N/A
Computer:
Description:
A VSS writer has rejected an event with error 0x800423f3, The writer experienced a transient error. If the backup process is retried,
the error may not reoccur.
. Changes that the writer made to the writer components while handling the event will not be available to the requester. Check the event log for related events from the application hosting the VSS writer.
Below events were found after running Windows Backup:
Log Name: Application
Source: SPP
Date: 10/8/2017 11:23:23 AM
Event ID: 16387
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer:
Description:
Writer Microsoft Hyper-V VSS Writer experienced some error during snapshot creation. More info: .
Log Name: Application
Source: Microsoft-Windows-Backup
Date: 10/8/2017 10:43:46 AM
Event ID: 521
Task Category: None
Level: Error
Keywords:
User: SYSTEM
Computer:
Description:
The backup operation that started at '2017-10-08T07:43:40.360000000Z' has failed because the Volume Shadow Copy Service operation to create a shadow copy of the volumes being backed up failed with following error code '0x8100010C'. Please review the event
details for a solution, and then rerun the backup operation once the issue is resolved.