If you have 20Gb or so of data (as I'm sure most of us do) then backuping it up and restoring it via ftp over a 10Mb network interface could never be described as trivial I'm afraid. Even if it happened at theoretical max speed, backing up and restoring that amount of data would take 11 hours or so.

Even dd'ing it, assuming you have drive space available is a very slow process.
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Remind me to change my signature to something more interesting someday