We backup a lot of Windows VMWare VMs with BackupExec 15 (vRay). Symantec BackupExec 15 take a VMWare snapshot mount the vmdk and put a full backup on a deduplication storage.
Later Dell vRanger makes a backup of the same VMs. It takes a VMware snapshot, mount the vmdk and make a incremental backup of this vm. Sometimes vRanger uses CBT (VMWare change block tranking).
Now we are concerned about the consistency of the backups.
Is it okay to make incremental backup form the same VMs with these softwares ?