Issue with rsync duplicate filesystem

Some issues encountered when using rsync to duplicate filesystem.

Extended attribute

When duplicating the files, rsync didn't take care of extended attributes, users might lose rights on some files.

Sparse files (Untested)

In order to create/update sparse files, to steps required.

To create new files in sparse mode

rsync --ignore-existing --sparse ...

To update all existing files (including the previously created sparse ones) inplace.

rsync --inplace ...