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.