How does the differential backup image approach compare to the incremental backup image approach?
The advantage most sited for differential backup images is that the file space to store the one differential image is less than storing several incremental images. As a practical matter, the difference in size is relatively small and so this is not a big savings. Another advantage sited for differential image files is that they are faster to restore since the changes are already merged together into one image file. In reality, True Image can merge 3-4 incremental images in just a few seconds, so the time savings on the restore would be just a second or two. Not enough to worry about. The big disadvantage with the differential image approach is that you loose the flexibility to restore to a weekly backup point like you can do with incremental images. With differential images, you can either restore to the one differential image file timeframe or back to the full image taken at the beginning of the month. This is a critical weakness of the differential image approach and is the main reas
