I have (2) 120GB hard drives in my MTU PC, and an external 120GB hard drive that I just keep a backup of the music on.
When I use the Powerquest software, it makes a direct copy (I believe) of the C: drive, onto my D: drive. Same size, same everything. The thought being that if something crashed on drive C:, you could boot to the other drive and be up and running. This is what MTU recommends when they sell you the extra hard drive (optional) and the Powerquest Drive Image software.
But, drive image (when you use the "Copy Contents of One Drive To Another" option), does not compress any information at all. It's supposed to be a working backup.
It just seems that when Hoster does something, or I do somethig to Hoster, it seems to corrupt the Hoster copy that is on the back-up drive as well.
Guess what............
http://www.powerquest.com/sabu/ghost.../features.html