I have seen network speeds in access of 30 MB/second.
I blame it on the 'client compression' setting that you can use.

Here are the statistics for a backup of some (mostly Empty) Oracle
databases
on a 100 Mb/s network.

Total number of objects inspected:      242
Total number of objects backed up:      235
Total number of objects updated:          0
Total number of objects rebound:          0
Total number of objects deleted:          0
Total number of objects failed:           0
Total number of bytes transferred:   459.63 MB  (w/o compression, around
20 GB I think)
Data transfer time: 11.28 sec
Network data transfer rate:        41,722.30 KB/sec
Aggregate data transfer rate:        160.59 KB/sec
Objects compressed by:
98%
Elapsed processing time:            00:48:50

11.28 seconds, and 459 MB ~= 41 MB/second... I think somthing is wrong
with that data transfer time. And it must be related to using the client
compression.  (I wonder if it was on in the original senders question?)

matthew.glanville AT kodak DOT com

William R Zehnder wrote:
>
> Networking is not my strong suit.  I'll explain how that client communicates 
> with
> the ADSM server.
>
> We've got a dedicated backup network and most of our machines have 2 nic 
> cards.
> The 2nd nic card is dedicated to the backup network.  That 2nd nic is a 100mb
> ethernet set at full duplex.  A standard ethernet cable connects that card to 
> a
> 3com 3900 switch. That switch (by the server farm) communicates with another 
> 3900
> switch (next to the ADSM server) over fiber.  The ADSM server (RS/6000 S70) 
> has a
> gb card and connects to the 3900 switch by a fiber cable.
>
> I should add that this is the only client that gets this type of throughput - 
> even
> though most have the same configuration.  The files on that server are VERY
> large.  That node transfered 38.5 gb's, but only 54 files were backed up.
>
> DAVID HENDRIX wrote:
>
> > William,
> >
> > So you achieve a sustained throughput of 15MB/sec via 100MB ethernet?  
> > Please
> > enlighten me as to how you achieve this fantastic rate - any help is
> > appreciated.
> >
> > David Hendrix
> > dmhendri AT fedex DOT com
> >
> > William R Zehnder <wzehnder AT JCPENNEY DOT COM> on 12/01/99 06:39:35 AM
> >
> > Please respond to "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
> >
> >  To:      ADSM-L AT VM.MARIST DOT EDU
> >
> >  cc:      (bcc: DAVID HENDRIX/216832/ITD/FEDEX)
> >
> >  Subject: Re: Storage Tek 9840 transfer rates.
> >
> > 100 Mb ethernet.
> >
> > "Robinson, Cris" wrote:
> >
> > > I have a quick question...
> > >
> > > What is the network pipe?
> > >
> > > C
> > >
> > > __________________________________________________
> > > Cris Robinson
> > >
> > >         -----Original Message-----
> > >         From:   William R Zehnder [SMTP:wzehnder AT JCPENNEY DOT COM]
> > >         Sent:   Wednesday, December 01, 1999 8:25 AM
> > >         To:     ADSM-L AT VM.MARIST DOT EDU
> > >         Subject:        Re: Storage Tek 9840 transfer rates.
> > >
> > >         Jason,
> > >         We have an STK9710 with 6 9840 drives.  Only one of our clients 
> > > back
> > > up directly to
> > >         tape and here is its statistics -
> > >
> > >         11/28/99   01:09:29  ANR0406I Session 21395 started for node PSOFT
> > > (WinNT)
> > >         11/28/99   02:56:04  ANE4961I (Session: 21395, Node: PSOFT)  Total
> > > number of
> > >                               bytes transferred:    38.54 GB
> > >         11/28/99   02:56:04  ANE4963I (Session: 21395, Node: PSOFT)  Data
> > > transfer
> > >                               time:                2,689.15 sec
> > >         11/28/99   02:56:04  ANE4966I (Session: 21395, Node: PSOFT)  
> > > Network
> > > data
> > >                               transfer rate:        15,031.02 KB/sec
> > >
> > >         We converted from DTL to 9840 a few months ago, and the speed and
> > > reliability of
> > >         the 9840 have been great.
> > >         If you want migration rates, let me know and I can send them to 
> > > you.
> > >
> > >         "Jason E. Thomas" wrote:
> > >
> > >         >         Has anyone had experience with Storage Tek 9840 drives 
> > > and
> > > ADSM?  If so
> > >         > could you please forward me some of your backup transfer rates 
> > > in
> > > KB/sec as
> > >         > generated by ADSM after backup completion?  Thanks.
> > >         >
> > >         > Regards,
> > >         > [------------------------------------]
> > >         >   Jason E. Thomas