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Old 05-08-2005, 10:42 AM
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dnanian dnanian is offline
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SuperDuper! doesn't copy first, but it does do everything in "one pass". So, as it traverses the file folders in "natural order", when we hit things we need to delete, we delete them... when we hit things we need to copy, we copy them.

When you get to the point where you're almost full and radical changes are made, you're more likely to run into a problem where a transient condition exists where more space is needed than you have.

We could have traversed the entire drive, figured out what to delete, and then delete before copy. Of course, in that situation, if there's a problem copying new files, you could end up with a backup missing all sorts of files, which isn't good either. I think you'll run into this situation far, far less often.

Hope that helps explain what you're seeing.
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