Perhaps this site would be a useful reference:

 http://www.quesera.com/reynhout/misc/rsync+hfsmode/

I've used this patched rsync with some success but have certainly 
not tested it exhaustively.  It is probably not ready for prime time
for many people, since it does not have a "restore" option - when
rsyncing back to your mac it does not convert out of appledouble
back into normal format.  this is scriptable, though, i guess.

The advantage is that in theory it does not require modifications to the
linux-side rsync, since it just tells the other side it has two files,
one for each part of the resource fork; it might even "just work"
with backuppc.

I also came across this:

 http://www.lartmaker.nl/rsync/

Which might be helpful but doesn't solve the problem of backuppc not
working with apple's rsync.

On Mon, Nov 12, 2007 at 10:46:34PM -0500, Chris Heegard wrote:
> Hello,
> 
> I've installed Backuppc on my ubuntu machines and my macs.  I would  
> like to improve it's use on the mac.  In particular, I would like a  
> reliable method to rsync mac-to-mac and mac-to-linux that would  
> preserve resource forks.  I know that apple's rsync function has an  
> extension:
> 
> -E  --extended-attributes   copy extended attributes, resource forks
> 
> but this does not work with backuppc.  I might note that the apple  
> tar file does store the resource of a file as a pair:
> 
> filename -> (filename,._filename)
> 
> and that this is the same method that unison uses (which works both  
> mac-to-mac and mac-to-linux).
> 
> In the meantime, I've written a startup script (/Library/StartupItems/ 
> backuppc) that I could contribute.
> 
> -Chris
> 
> ______________        _____
> __  ____/__  /___________(_)_______
> _  /    __  __ \_  ___/_  /__  ___/
> / /___  _  / / /  /   _  / _(__  )
> \____/  /_/ /_//_/    /_/  /____/
> 
> ______  __                               _________
> ___  / / /________________ ______ _____________  /
> __  /_/ /_  _ \  _ \_  __ `/  __ `/_  ___/  __  /
> _  __  / /  __/  __/  /_/ // /_/ /_  /   / /_/ /
> /_/ /_/  \___/\___/_\__, / \__,_/ /_/    \__,_/
>                     /____/
> 
> 
> 
> 
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danno
--
Dan Pritts, System Administrator
Internet2
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