Since I just saw this elsewhere with duplication on NT, I'd suggest
setting the NET_BUFFER_SZ up on the media server (if it isn't already)
which is doing the duplication.


Andy Skates writes:
> We have 10 x 9840 FC tapes drives attached to Brocade Silkworm
> switches. We're running NBU DataCentre 3.4 under NT 4.
> 
> I'm not so worried about our backup times, however, we are getting
> really slow duplication times, and I mean really slow!
> 
> Our backups are multiplexed and we're using BPVault to do
> our duplication, with multiplexing set to 1.
> 
> My questions are:
> 
> 1.    Are other people getting slow throughput when duplicating?
> 
> 2.    Has anyone tried turning off multiplexing for the duplicates to see
>       if this improves times?
> 
> 3.    Does the entry in BPTM 10:57:39 [244.376] <2> mpx_read_data:
>       waited for empty buffer 17844 times, delayed 34819 times indicate
>       that I need to try tuning the size/number of data buffers.
> 
>       If so has anyone tried doing this in an environment with NT 4 NBU 
> servers,
>       Brocade Silkworm SAN switches and FC attached 9840s?
> 
> 
> Thanks,
> 
> Andy Skates
> Legal & General Assurance PLC
> 
> andyskates AT iname DOT com
> 
> 
> 
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-- 
Larry Kingery 
       If at first you don't succeed, skydiving isn't for you.