I have two hard disks with movie files on them and I need them to have the same contents.
rsync to make sure that disk B has the same files on it as disk A, and it seems to be transferring everything.
I have added around 10 new movies to disk A and all I wanted was for
rsync to quickly note which ones were new and copy them.
What I'm doing is
rsync -rv -P /Volumes/DISK_A/Film/ /Volumes/DISK_B/Film/
(both locally mounted USB disks) and I assumed it would skip 99% of the files and only transfer across the new additions.
But it seems to be transferring everything:
Alien/Alien (1979).avi 735027200 100% 17.24MB/s 0:00:40 (xfer#2, to-check=329/333) Alien/Aliens (1986).avi 945698816 100% 16.27MB/s 0:00:55 (xfer#3, to-check=328/333) Animated/Aladdin (1992).avi 869096258 100% 16.67MB/s 0:00:49 (xfer#5, to-check=325/333)
and those movies were already there both on source and destination.
The files are the same, the details look exactly the same if I do
ls -la, same permissions, owner, size etc.
Is rsync having to do some kind of deep check of the bytes in the file in order to see whether it's truly the same? Because it's pretty slow and I don't need it to do that.
What I really want is an
rsync command which means 'copy files on source which don't exist on destination and ignore every other factor.'