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Druva Documentation

VMware backup fails if auto-enabled CBT is selected for a VM with incompatible hardware

Problem description

Backup from virtual machine fails with VMOMI error.  The issue occurs when you have an old hardware version of a virtual machine and it fails to back up when Auto-Enable CBT is selected in VM Backup Policy. The following entry is logged in the detailed backup job logs.


You can get the VM hardware version of the VM (vmx-04) from the Phoenix log file.


Upgrade the hardware version of the virtual machine to 7 or later. Virtual machine hardware version 7, introduced with vSphere 4.0, is the first version released that supports CBT.

If VM hardware upgrade is not possible, move the virtual machine to a different VM server group with a VM backup policy that has disabled the Auto enable CBT setting.