One or more Hyper-V guests have reported errors that could result in an incomplete backup

Error code

Product

Applies to

BA730

BackupAssist

BackupAssist v7.2.2 and later.

Description

One of the guest machines that is part of the backup has reported errors and may not have been backed up correctly. This is usually caused by the VSS snapshot not being able to be completed.

Mouse over the error within your backup report to see which guest(s) should be investigated.

Resolution

Identifying the guest/s

When troubleshooting problems with Hyper-V backups, it is important to first determine which guest/s is causing the error. You can do this by checking the Hyper-V VMSS logs, as shown below. You may also be able to identify the guest from the information in the backup report. If you are not able to identify the guest, try backing up the guests one at a time until the errant guest is found.

The guest causing the error can be confirmed by running the backup again without that guest and checking that the backup runs without errors. You can also try a VSS backup on the guest itself using a trial version of BackupAssist. The success or failure of this backup will help to further narrow down what could be causing the error.

If the problem is with backing up data within a guest, will you need to open the Event Viewer inside that guest and review the VSS log entries. These may identify the exact cause of the VSS error.

  1. Click the Start button.
  2. Click Control Panel.
  3. Click System and Maintenance.
  4. Click Administrative Tools.
  5. Double-click Event Viewer.
  6. In the left hand navigation window, browse to Applications and Services Logs > Microsoft > Windows > Hyper-V-VMMS.

Identifying the problem

The VSS service within Windows writes a lot of information to the Event Viewer, which is a great resource for finding the root cause of this error. Check the Event Viewer by selecting on Start > Run > Eventvwr. See if there are any specific VSS or SPP warnings or errors being generated from the system during the backup process. To learn more, see this video about these specific event logs: https://www.youtube.com/watch?v=76u-MML-h9w.

Also make sure that the Volume Shadow Copy Service is not disabled, and that no other 3rd party VSS providers are interfering with the backup. (Control Panel > Administrative tools > Services).

Last updated

Created

Further assistance

8th Jan 2018

28th Aug 2013

BackupAssist Support page