Ensuring ownership is on means that you need to do a "Get Info" on the drive, and ensure that "Ignore ownership on this volume" is NOT checked.
I'm not sure, at present, why it would be copying these files every time. Could you please provide me with an "ls -l" of one of the files on the source and destination volumes, running the ls -l with and without sudo? In other words, if there's a file in the root that's being copied called "foo.mp3", you'd do:
ls -l /foo.mp3
sudo ls -l /foo.mp3
and, on the backup:
ls -l /Volumes/my-backup-volume/foo.mp3
sudo -s -l /Volumes/my-backup/volume/foo.mp3
Thanks.
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--Dave Nanian
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