The articles in this section refer to Barracuda Backup Legacy Release firmware or newer, and VMware® 4.1 and above with the VMware license which includes access to vSphere® Data Recovery API.
Use Changed Block Tracking (CBT) to perform incremental backups on virtual machines running on VMware ESX/ESXi. CBT identifies and tracks block changes since the last backup, and stores these changes in log form, greatly reducing the number of backup windows and improving backup window times. Additionally, subsequent replication efficiency and speed are improved.
Setting Up Changed Block Tracking
For details on setting up and enabling CBT on virtual machines, refer to the VMware Knowledge Base articles available from the VMware website:
- Changed Block Tracking (CBT) on virtual machines
- Enabling Changed Block Tracking (CBT) on virtual machines
You can enable CBT directly on a VM data source. For a list of requirements and detailed steps, refer to How to Enable Changed Block Tracking through the Barracuda Backup Web Interface.