I recently made a clone of my hard drive. The clone boots fine and everything "looks" to be in place, however, the disk usage space is slightly different. The clone has 311.94gb used, while the original drive has 312.55gb used. So there is about a 90mb difference in disk space used. I keep repairing permissions, but new permissions errors appear when I verify them again after doing so. These are mostly in obscure system folders relating to Safari, Java, and Remote Desktop Client. Should I be concerned about the difference in size? Are cloned hard drives ever EXACTLY the same? Are the differences being caused by write protected logs and other junk that is probably not necessary for the system to run? My main concern is that these missing files or whatever may cause issues with the system or other applications as time goes on.