Eliminating VSS Error 8229 from Event Logs During Virtual Machines Backup


Sometimes when the backup for Virtual Machines is initiated, you may face the following error:

A VSS writer has rejected an event with error 0x800423f4, The writer experienced a non-transient error. If the backup process is retried, the error is likely to reoccur.

Generally, if you check the Event Logs, you'll find there the following eventID: 8229.

Suggestions and Resolutions

This EventID and error means that it's not possible to create a snapshot for the specific Virtual Machine. To fix this problem you need to perform the following steps:

  • Open Hyper-V Manager

  • Open Hyper-V host and select virtual machine causing error

  • Right-click VM > Settings > Management tab > Integration services

  • Disable Backup (volume snapshot) Service

  • Click OK

The machine will be in 'saved' state for a short period of time when you're not using 'Backup (volume checkpoint)' option and the uptime counter could be reset.

To run the backup with this option enabled, check eventlog on the Hyper-V host - it will contain warnings/errors pointing to the particular machine causing the issue.

You will need to check the eventlog inside of VM(s) specified and implement corresponding fix to resolve the issue.

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