When running an ESXi replication with vRanger Backup & Replication the following error is thrown:
An internal error occurred during execution,please contact Quest support if the error persists. Error Message:Virtual appliance 'vaprod1' has not been configured with a required data disk.
The 2nd vmdk\ scratch disk that is required for ESXi replication on the each VA has not been setup\ configured.
Please reference the following link below page 81 of the vRanger 5.2 installation & setup guide. This will show you how to setup the scractch disk for each of the Virtual Appliances involoved in ESXi Replication.