troubleshooting Question

VSS Event ID 8229 - Hyper-V backups fail

Avatar of Joe Brown
Joe Brown asked on
Storage Software* iscsiWindows Server 2012* Volume Snapshot Service (VSS)Hyper-V
24 Comments2 Solutions5541 ViewsLast Modified:
Hello Everyone,

I have 2 Hyper-V Host servers (non clustered) that are throwing Backup errors when trying to backup the Hyper-V servers.  Our backup service is Barracuda Cloud...however they cannot help.

Event ID 8229 in the VSS

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.

   PrepareForSnapshot Event

   Execution Context: Writer
   Writer Class Id: {66841cd4-6ded-4f4b-8f17-fd23f8ddc3de}
   Writer Name: Microsoft Hyper-V VSS Writer
   Writer Instance ID: {7ce2a182-2c5e-4e8f-afb9-b94d68791308}
   Command Line: C:\Windows\system32\vmms.exe
   Process ID: 2840


Using VSSADMIN LIST WRITERS shows all writers with "No Error" on both the host machine and Hyper-V machines.  All Hyper-V files including the .avhdx files are on an iSCSI volume.

Right now our backups are failing for the Hyper V servers but Barracuda cannot help because they say it's a Microsoft Problem.  Any help?
Mark Bill
Exchange, AD, SQL, VMware, HPE, 3PAR, FUD, Anti MS Tekhnet, Pro EE, #1

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