Smart update copying all files each time

[jbyronr]

I have the same issue for an external firewire drive that only contains my iTunes music library. When I use SD! to smart update that drive to another external drive, it copies all the files each time (~2hours). Smart updates of my internal hard drive work as expected.

In terminal, the owner, group, and permissions seem to be set identically for files in my ~ folder as they are for the files on my iTunes drive. The group is listed as the same name as my username. Should I chown/chgrp the group to be 'admin' instead? (my primary user account is a member of the admin group)