Hi, my task was to clone a ntfs partition with around 160k files and size 90GB from one external USB disk to another - max path depth up to 256 chars. Sys 1) Win Vista SP2 Ger robocopy 0027 (probably MS bug/oversight, since Vista SP1 ENG they ship 0028) Sys 2) Centos 5.3 - rsync 3.0.6 - ntfs-3g 2009.4.4 Here are my findings, what makes me nervous though is that rsync seems to have undeterministic behaviour, too. Now in order I ran the test: robocopy /MIR F: G: - missed 24 Files when looking at summary in explorer - told me it could not copy one file rsync -avnO --progress --stats quelle/ ziel/ - dry-run found 20 missing files of the robocopy run rsync -avO --progress --stats quelle/ ziel/ - copied the 20 said files rsync -avnO --progress --stats quelle/ ziel/ - dry-run found now 4 missing files! rsync -avO --progress --stats quelle/ ziel/ - copied the 4 said files rsync -avnO --progress --stats quelle/ ziel/ - no files found I am not concerned about robocopy - but rsync. Is there any reason to miss these files? Thx Rainer