Kurt Jaeger wrote:

quoted text
> There's another topic if one uses unionfs in jail() setups: How to
> backup the files, and only those files that a different from
> the base ?

If you have a reasonable number of files you can maybe get away with the =

"brute force" approach - gather stat's for all files in the base FS,=20
gather stat's of all files "above" and calculate an intersection with=20
different inode numbers.