RDS container is limiting read speed from DR4100. Is the DR4100 performing the de-duplication or something else?
The following tests were done.
Direct to tape at 110MBps
Data copy from tape to tape at 110MBps
Backup to DR4100 at 90~100MBps
DR4100 to tape at 28~30MBps
The maximum throughput is around 30MBps when we know that the LTO5 can go up to 140MBps. When tested with a different source container like NFS, the read speed reached to 30~35MBps.