Commvault backup copy failure: No disks were found on virtual machine

 If the Commvault backup copy jobs failed to backup a VM and report the following error then you try out the two possible solutions: 

No disks were found on virtual machine [VM-name].  Please ensure that the virtual machine is configured with one or more virtual disks, and validate that the proxy is able to communicate with the Host.

Possible solution: 

1) Verify the VMDK are not INDEPENDENT or RDM disks. If yes, then you will need to review and possibly configure the subclient to backup the VMDK. 

2) Verify if there are any filters configured that might stop the VMDK from being backed up.