Fred and Chuck seem to sum it up quite nicely. The "image" programs like teledisk and imagedisk are very limited in what they can image. What they do, they do very well, but they rely on a WD or WD emulated chip in the floppy control circuit. Since the current copyright standing of teledisk is not known to me, but that of imagedisk is, for these quick and dirty copies, I rely on ImageDisk. If I find images in teledisk, I write them out to physical media and re-read them into ImageDisk files. The catweasel does not rely on the WD style controllers. It can handle the "funny" address marks, hard sector disks, GCR, read and write FM formats reliably, and has a host of options for dealing with damaged disks. Just my $0.02... Kelly