Jules Richardson wrote: jim wrote: [CA floppies] Lars said something to me at the weekend about the disks that he has being a bit weird; the first track's laid down using FM density with the rest being MFM - and for some reason Imagedisk wasn't making sense of them even in "full analysis" mode. I'm not sure though if that was *all* CA disks, or just some of the ones he happened to have. ------------ Billy responds: I saw this a lot on the early 8" single sided drives. The transition to double density was FM to MFM. The first track was preserved as FM so older drives could still read the boot track and then check for double density hardware. I thought it had died out when the first double sided units came along, but obviously not. Some of the early LSI could handle this so it was invisible to the end user. All of our 8" test systems at Magnetic Peripherals used this format on the double density disks. Billy