When replicating a vm that has Virtual mode Raw Device Mappings (vRDM) replication and failover succeed but failback does not work.
Replication works because VMware will create a snapshot for a vRDM so vRanger can read the disk. The Target VM will be created with a vmdk file. Failover will work because there is a vmdk file which contains the data from the vRDM.
Failback will not work because vRanger cannot access a vRDM for write.
The original source vm either needs to have the vRDM converted to a vmdk or a new vm created using just vmdks.
To maintain the vRDM on the original source exclude that disk from the replication job and use a different method to move the data back to the original vm.