Throughput is very low for the new drives

Hi All,

We have bought two LTO6 Drives for HP TL4000 Library. We are having a very low throughput for backups with these drives like not more than 30MB/sec which we should actually get like around 150-160MB/sec.

Our OS is Windows 2007 SP2

We are using netbackup 7.1 for the backups.

Can someone help me to improve my drives performance. Do I need to make any configuration changes.

We are using a cleaning media which we used earlier when we had LTO4 drives. Its ID shows as CLNU00L1. Can we use this for LTO6 Drives. This may sound silly but i'm very new to this. Please help me out.