Product Version: 7.0
Last Modified: 22 Feb 2016

Problem

Upon backup, replication or recovery job, one of the following messages is displayed.

VMware CBT / Hyper-V RCT is not supported by the VM.
Backup / Replication / Recovery will be performed using proprietary change tracking method. The job may take longer to complete.

or

Backup / Replication / Recovery of the VM has failed.  
VMware CBT / Hyper-V RCT is not supported by this VM.

Background

VMware CBT (Changed Block Tracking) and Hyper-V RCT (Resilient Change Tracking) are the technologies to track changes on the virtual machines. NAKIVO Backup & Replication uses these technologies to create incremental backups faster. If the usage is not possible, NAKIVO Backup & Replication uses proprietary change tracking method which works slower.

VMware CBT is supported on ESXi hosts v4.1 or later and VMs with Virtual Hardware version 7 or later.

Hyper-V RCT is supported on Hyper-V 2016 Server and virtual machine configuration version 8.

Solution

Consider upgrading hypervisor and virtual hardware (for VMware) or virtual machine configuration (for Hyper-V).