Agent for VMware cannot back up Raw Device Mapping (RDM) disks in physical compatibility mode or independent disks. The agent skips these disks and adds warnings to the log. You can avoid the warnings by excluding independent disks and RDMs in physical compatibility mode from the backup plan.
If you want to back up these disks, install Agent for Windows or Agent for Linux in the guest operating system.
An Acronis Backup Advanced license assigned to the host enables you to install agents in an unlimited number of guest systems.
For more information about how to install the agent, see the installation documentation.
After you install the agent and add the machine to the management server, the machine appears under Machines with agents in the All machines with agents group. When creating a backup plan, select the machine here rather than under Virtual machines. Or, you can connect the console to the machine directly as to a physical machine.
You might want to use a different backup strategy for independent disks or RDMs in physical compatibility mode. For example, if these disks contain frequently changing databases, you can back them up more often than the operating system, or use different settings for them. In this case, create a separate backup plan for these disks.