100Mb/s=10MB/s=36000MB/hr=36GB/hr theoretical maximum. 

If you get 20-25GB/hr you are lucky. But this is only network speed for 100Mb/s 
ethernet full duplex. It is very important that you have full duplex.
So you can get 20-25GB/hr if you don't have any other bottleneck with hardware.

And don't believe estimate from GUI. Try to test it. Select 5-10GB and restore 
it to temp folder.

Joe Crnjanski
Infinity Network Solutions Inc.
Phone: 416-235-0931 x26
Fax:     416-235-0265
Web:  www.infinitynetwork.com