On your master/media server, you may want to check and see if you have the 
following tuning parameters in /usr/openv/netbackup/db/config:

NUMBER_DATA_BUFFERS
SIZE_DATA_BUFFERS
SIZE_DATA_BUFFERS_RESTORE

These are text files inside the db/config directory on Unix. These can be 
"tuned" to give you better (or worse) performance on your backup. An example of 
settings would be:

NUMBER_DATA_BUFFERS - 32
SIZE_DATA_BUFFERS - 262144
SIZE_DATA_BUFFERS_RESTORE - 262144

This is what I have for LTO-4 drives and I get very good performance out of 
them.

Also with Oracle RMAN, there are RMAN parameters that can be 
set/changed/tweaked to see where you can get the best overall RMAN performance. 
We can usually backup about 14TB in about 6 hours via 8 tape drives (as an 
example).

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