I think you are referring to the Key disk floppy? The RSlinx program usually comes with this 'Key' disc, so that you can load the software on several computers, but each time you want to run on a particular PC, the Key has to be removed on to the floppy and transferred over to the other PC.
This is so that only one copy can be run at a time.
I have used one of the verbatim copy programs to copy a key disk (for back up purposes only, of course!!).
It cannot be copied by the normal PC copy utility.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.