Lynn - this sounds familiar and just happened to me two weeks ago:)

If you're looking @ Page Faults and watching other ocounters on the source server when the full mirror...

Since DT supports these versions, is there a reason why? I have it on Enterprise x64 for over a year...

The most important variable is the size of the "backup" file (as stated) he wants to move and the connection between the servers:

> .bak file only = xcopy with -v...

Best bet would be a SAN mirror or use third party utilities (i.e. Double Take) - mirror the drive you're doing you backups on, at the block level with checksum...