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Simple versioned backups with RsyncX
Authored by: rflo on May 24, '06 08:40:49AM

The author writes: "The rsync that comes with Mac OS X isn't HFS+-aware, though -- it won't copy resource forks." The rsync shipped with MacOS 10.4 is resource-aware: see the man page, especially the -E option.

Also, this hard-link scheme depends on having the backups and the original on the same file-system (hard-links do not work across file-systems), which is not a great idea for back-ups. A proper incremental backup tool, even the tar supplied with MacOS, would enable backups based on changes since the last backup, without depending on a dubious use of hard-links.

Ronald Florence

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Simple versioned backups with RsyncX
Authored by: Syco on May 24, '06 09:18:51AM

I had the same reaction you did, but I think what he wants is something like this:

Main Drive:

Let's say before backup2, he changes foo.

Backup Drive:
/backup2/bar <--- this is hardlinked to /backup1/bar, because it's the same file, and this preserves the entire backup structure
/backup2/baz <--- same as above

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