Hi Jon,

I may have missed an earlier post, but what kind of network is
between the two devices (server you are wanting to back up &
Snap storage) ?

If you have 10Mbps ethernet hub, then 3.5MB/sec is an extremely
good figure. If you have 100Mbps switches between the two
devices, then 3.5MB/sec is a very lousy figure (should be more
like about 11MB/sec).

You could also be hitting issues with network card throughtput,
especially on the Snap device. If it isn't designed for high
utlisation, it might be the bottleneck.

So, suggestions:

1. Make sure that both devices are plugged into the same 100Mbps
switch (if possible use a seperate switch for the testing).
2. Make sure both devices connect at 100Mbps full-duplex
3. check transfer rates again
4. compare to transferring same files from a PC to the Snap
device (using SMB protocol from PC).
5. If you have another *NIX box, try transferring file to/from
that one to the Snap device and also to/from your current server
to the other *NIX box.

HTH.


regards,
Tony.


 --- Jon LaBadie <jon AT jgcomp DOT com> wrote: 
====== SNIP ======
> 
> I tried some throughput checks today.  Test one was a "cp -r"
> of a directory tree with 8.5GB (only a few large files) and
> test two was a ufsdump of a 1GB partition.  Both gave between
> 3 and 3.5MB/sec rates to the NFS device.  That certainly is
> higher than the 1MB/sec I get to tape, but quite a bit lower
> than the rate to a local disk.
> 

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