[Nolug] Fastest way to create a local mirror of a huge tree?

The mirror doesn't exist yet, so rsync's clever data-minimizing
algorithms aren't valid. (Also, there are lots of symlinks that need be
preserved.)

1. cp -av /data /mnt/backups/data
2. cd /data && tar -cvf – . | (cd /mnt/backups/data && tar -xpvf -)
3. rsync -avz --stats --progress /data /mnt/backups/data

In a long test, I got 32MB/s from the cp when copying files in the 200MB
to 4GB range, but 4MB/s for files in the 100KB range.

In a short test only 6MB/s from tar; maybe it was scanning through the
list of files?.

rsync bounces around from 25MB/s to 4MB/s.

So, what's your experience in the best way to create an initial mirror?

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