With the storage to be backed up and Data Protector Library on the same network the transfer rate is 57 MB/s with a total of 25 TB taking 120 hours. Another job involves backing up storage on a different network with firewalls in between and has a transfer rate of 49 MB/s with a total of 5.5 TB taking 31 hours to complete. Another similar job on a different network has a transfer rate of 31 MB/s.
Would these be typical figures and what might improve the 120 hour job.