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Old 09-10-2008, 03:51 AM
Alaska Jack Alaska Jack is offline
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Join Date: Sep 2008
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Question Simple question about backing up images

Dave, or other expert, I have a simple question.

I use SD to back up files from my iBook to an external firewire drive.

On the ibook hard drive is a relatively large, encrypted disk image. I don't modify the contents very often.

I normally back up with a script that excludes the image. The rationale was, if I changed one of the image's content files, I didn't want SD to take the time to write an entire copy of the image to the backup hard drive.

Now I'm wondering, though, is that the case? If I add, delete or modify just one file within the encrypted disk image, does SD need to rewrite the entire file? Or does it just rewrite the little bit of the image that changed?

Thanks, and great program -- it's worked like a charm for me.

- Alaska Jack
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