Smart Update to Sparse Image takes up far more space than source

[harvardslacker]

Originally Posted by dnanian

Note that you need to do this to the image file, typically when closed, so delay a background script for 20 seconds or so...

I noticed that the 'compact' command failed whenever the disk image was mounted, so I made a shell script that unmounts the image, compacts it, and then remounts it. This seemed to work fine, but because the program indicates that before copying but after mounting the disk it does things ('preparing' it, preserving the Spotlight state, etc.), I was concerned that unmounting it after those things might cause problems, so I changed my script to just perform the 'compact' command after the backup. So far, so good... I'll post here again if after a number of repetitions some problem crops up.

Thanks,

Greg