Disabling Changed Block Tracking for VMware

By default, Changed Block Tracking (CBT) is used for backups using the Virtual Server Agent. For virtual machines where there is a known issue , you can turn off CBT to run backups using Cyclic Redundancy Check (CRC) instead.

Procedure

To disable Changed Block Tracking for a subclient:

1. From the CommCell Browser, navigate to Client Computers > virtualization_client > Virtual Server > VMware > backup_set.

2. Right-click the subclient and select Properties.

3. Click the Backup Options tab.

4. On the Backup Options tab, clear the Use Changed Block Tracking option.

   • When the Use Changed Block Tracking option is selected, CBT is enabled and used for backups where it was not already specified. The vsbkp log indicates that CBT is used.

   • When the Use Changed Block Tracking option is cleared, CBT is not enabled, and CRC is used for backups. The vsbkp log indicates that CRC is used.

5. Click OK.

This change is tracked in the Audit Trail Report.