Leslie Rhorer wrote: > And how useful is that? There are very few duplicate files on my > systems, because I use applications to eliminate duplicates. > Eliminating duplicates in a live data repository is far more important > than doing it on backup media. >
May be you misunderstand deduplication or duplication. It is not about files you have on your disk, but what is already in the backup repository, so you avoid duplicating the backup of the same file for example in each full backup. Because most of the files do not change, this is how you save that much space. If you were having files that change more often, then again it depends on how much of this files change and this much goes into the backup. In fact a backup with deduplication is a sort of always incremental, but the adventage is that you can do a full restore from any backup, which is actually cool.
