Most of our backups run at 1MB/s - 2MB/s, with many of them running at 
<1MB/s. Our setup is an nt4 master/media server connected via 1000baseFX 
to a 100baseT switched network. 
Using network monitor on the backup server, i see that network usage 
stays around 4MB/s while backups are running. If i copy a large file at 
the same time, the network usage spikes to 13MB/s. This tells me that it 
is a problem specific to nbu, not a general network problem. Our network 
guy used mrtg to generate a graph of usage on the switch port and it 
showed the same usage, ~4MB/s.
I checked the bptm logs and found that bptm was usually waiting for full 
buffers, not the reverse. We are using the default 8x32k buffers. No 
multiplexing.
The clients being backed up are a mix of mostly nt/2k boxes and some 
solaris machines. This exists on both platforms.
We are running nbu 3.4.1. help?

Jeff maley