On Dec 12, 2010, at 10:18 AM, Tom Limoncelli wrote:

> In general I like SuperDuper! and CarbonCopy Cloner however you've
> added an interesting twist that you want it to happen while the system
> is running.

If you're running in paid mode, both of these programs can be run while the 
system is up and running (at least, I've done that myself with both programs), 
and I believe that they both can be set up to schedule themselves to run at 
certain times of the day.  They can also be set to back up either complete 
images (minus certain temporary files that should not be backed up), or given a 
more restricted set of files to be copied.  They can also create volume images 
onto which the backup will be written, and will be mountable just like a 
regular volume.

Recent versions should be fully capable of writing to sparse volume images, and 
the cool thing about them is that they create a set of "slice" files that exist 
under a directory, and if you are repeatedly backing up to the same sparse 
volume image, only the slices that need to change to reflect the new contents 
will be modified.  You can then copy only those changed slices somewhere else, 
for additional backup measures.

They are more system image tools, but have slowly been accumulating some of the 
more standard system backup features.

--
Brad Knowles <[email protected]>
LinkedIn Profile: <http://tinyurl.com/y8kpxu>

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