Marlene, I can only read your mail when I answer it. I suppose you use a html format. I use Mail and find this format very annoying. Please use plain text in the future. I suppose your email is about floppy disk formats. I have copied DEC PDP-11 hard disks to DD files ( a sort of tape). Wim ---------- Can you tell me hoe to copy a HD disk tp a DD disk so that I can use it in my PSR6000 ? Marlene.