Trying to backup the contents of a 2 TB external drive to another of equal capacity. Finder copying is extremely slow. Is there a quicker alternative?
I would recommend using rsync for this:
rsync -avP /disk1/ /disk2
/disk2 are the mount points of your two disks. The
-a flag will keep file metadata intact and
-vP will give you a verbose progress indicator.
Main advantage is that you can stop the process at any time and continue later simply by running the same command again.
But it will not be quicker ;-)– RinzwindJul 16, 2018 at 13:20
But it is more fail safe, which is preferable for backups Jul 16, 2018 at 13:21
I didn't measure, but I would think it's also quicker than using any GUI tool. But that's just guessing. Jul 16, 2018 at 13:23
Oh, I agree on all the benefits but it wont be quicker and that's his main concern :D
taris going to be the quickest tool (and will also be less secure ;) ) Oh the memories that haunt me after my boss asked me the same question. It took us 8 weeks of testing :-X– RinzwindJul 16, 2018 at 13:23
I agree tar is faster. If you get it right and error free the first time. Jul 16, 2018 at 13:26
cpdoes it file at a time, writing file system entries etc... You can clone the drive (copies sectors regardless of what's in them).. help.ubuntu.com/community/DriveImaging
tar cf - . | pv | (cd /mountpoint; tar xf -)should be the quickest. BUT your question contains a trap: backups are not about being QUICK. They are about being SECURE. You really should use the answer by Sebastian regardless of speed and time. If it is a USB2 connection a USB3 connection will give you the most speed increase.