Hello folks,

You may see in the redbook "ADSM Concepts" the following:

""... LANs are rated in megabits per second, and most system throughput
values are
stated in megabytes per second. The factor of 8 bits per byte is easy =
to
overlook. Even after converting network speeds to megabytes per second, =
the
number represents the maximum speed of the network when data is =
flowing.
Remember that the communication protocol adds headers, control data, =
and
acknowledgments to the data sent through the network. A rule-of-thumb =
is to
use 50%-60% of the published capacity as the practical limit of backup
throughput on a token ring, fiber distributed data interface (FDDI), or
asynchronous transfer mode (ATM) network, and 35% on an Ethernet...."

I think that this may give you some help about data transfer rates...

Hope it helps...

        Jose Carlos