Ed, I have recopied the Montezuma Mike CP/M 2.2 disk and also the CP/M 3 disks which I discover on examination are not Montezuma Mike, but Radio Shack. I have looked each disk over rather closely, and all appear to be OK. Enclosed is a printout of the dirctory of each disk. I am baffled by your inability to get 2.2 to boot. Some time ago, I had a Model 4 here temporarily, and the only disk that I had to boot it was one made by the same process as this one and the one sent to you previously. I have even read it on another drive, so I do not think that alignment is a problem here. Similarly, with the CP/M 3 disks and your problems with COPYDISK. The error line (Drive/Track/Side/Sector/Status) is from within COPYDISK, so it runs that well anyway. I am not that familiar with the program, so I cannot offer authoritative advice on it. I assume that you were running CP/M 3 at the time and were not trying to copy from and to the same disk. I also assume that you were using normal 360k disks as the target(s). Did you try using a formatted disk as the target for the Copy the Contents option? I wouldn't think that should be necessary, but... I am also enclosing a couple of MSDOS 3.3 system disks - one in normal 360k format, and the second in a 'sort of' 720k format. I say sort of, because it is really the 360 (48tpi) copied onto a 96tpi disk. Only the first half is formatted. With luck, it will boot the Tandy (I'll not hold my breath! Tandys are funny.) And with even greater luck, under the Tandy BIOS it will format the full 80 cylinders. (More about breath...) Ed, I hope that these disks work better than the previous ones! I really don't know what else to do. - don