There might be a bottleneck in a parallel configuration setting.
How many savesets do you have running at one time?
How many savesets is your device run in parallel?
http://nsrd.wordpress.com/2009/02/17/basics-parallelism-in-networker/



> Howdy! I inherited care & feeding of a Quantum Superloader3-DLT-V4 library 
> driven by NetWorker. I didn't look too closely at it for 6 months because it 
> met needs and was working fine. Lately it's developed a couple quirks and 
> I've been digging into it in more depth. It's got an issue I'm working on 
> where it becomes unresponsive after sitting idle between jobs for a while, 
> but this post is for another reason:
> 
> While operating (apparently) normally, it never exceeds 1800KB/Sec 
> throughput, which calculations based on the documentation says is only about 
> 20% of expectations. I've reviewed the settings, and everything appears to be 
> correct. I've added additional network bandwidth, and confirmed that the 
> processor / drive / memory requirements appear to be optimal... I'd 
> appreciate any suggestions on a course of diagnosis and correction, since it 
> would improve efficiency & reliability if jobs completed as quickly as 
> possible.
> 
> ANY help will be greatly appreciated. I'm presently studying all the 
> documentation in depth hoping for insight.
> 
> Thanks in advance to anyone who has advice on this (or my 
> idleness-responsiveness) issue!


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