Specifications

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backup window times. In Virtual Machine File system (VMFS) partitions, CBT can identify all disk sectors that are in use. Additionally, subsequent
replication efficiency and speed are improved. Barracuda Backup access CBT through the vSphere APIs for Data Protection (VADP) by
requesting the changed VMkernel return blocks of data on the virtual disk since the last backup snapshot.
Requirements
To enable CBT, verify the following is true for your environment:
The host must be ESX/ESXi 4.1 or later;
The virtual machine owning the disks to be tracked must be hardware version 7 or later;
Snapshots exist on the virtual machine; and
Virtual machine storage is not (persistent or non-persistent) independent disk, therefore it is unaffected by snapshots.
Enable Changed Block Tracking
Use the following steps to enable Changed Block Tracking (CBT) through Barracuda Backup:
Log in to Barracuda Backup, and select the associated Barracuda Backup Server in the left pane.
Go to the page, and cBACKUP > Sources lick Edit next to your VMware data source:
Click in the section, and expand the VMware environment to locateSelect Specific Items Item Selection
your virtual machines:
When is turned , displays to the left of the virtual machine name:Enable CBT On CBT