The Setup is as below:-
1) Tandberg Tape Library L120+ with 4*HP HH LTO-6 tape drives.
2) IBM x3650M4 Media server with 8 GB RAM, 3* 300 GB HDD with one Dual port 8 Gbps Emulex HBA.
3) Backup is for Teradata application. The data from multiple LAN clients moves to this media server which moves the data to tape library through SAN switch.
4) All 4 tape drives and 2 ports of Emulex card of media server are put in the same zone of SAN switch.
We tested backup and were able to achieve 100 MBPS on a single LTO-6 drive and backup on all 4 LTO-6 drives is not going beyond 140 MBPS.
The team has been doing testing for past 10 days and has tried changing various network parameters, done Gigabit port teaming, tried direct SAN backup using BCV but the max throughput from the library is 140 MBPS only.
Appreciate suggestions !!