Re: Message with every backup: Backup completed successfully for Guest machine(A full scan was taken owing to CBT failure).

This message will be shown when the incremental backup of Hyper-V VMs is done by scanning the entire VM again. The entire VM will be scanned to run the incremental backup if the Vembu's CBT driver failed to track the incremental changes. The driver failure might happen due to the following reasons:

• CBT driver got reset in the host

• NTpath or GUID of the disk which hosts Hyper-V VMs disks got changed

• VembuIntegrationService is not installed on any one of Hyper-V cluster nodes

• High availability enabled cluster VMs configured for a backup using Standalone Hyper-V host option of Vembu

• Anyone of the cluster nodes is not reachable/power off

This message will also be shown whenever the ownership of the CSV gets changed.

Re: Message with every backup: Backup completed successfully for Guest machine(A full scan was taken owing to CBT failure).

To analyze this issue further, send the log folder of Vembu BDR Server and VembuIntegrationService as a separate ZIP file along with the name of the backup job to vembu-support@vembu.com.

You can find the log folder of Vembu BDR Server at < installation Location >\vembu\vembuBDR\log

For Example: C:\program files\vembu\vembuBDR\log

You can find the log folder of Vembu Integration service on the Hyper-V host at < installation Location >\Vembu\VembuIntegrationService\log

For Example: C:\Program Files\Vembu\VembuIntegrationService\log