3.Check to see if you have inserted the right type of diskette. For example, are you trying to read a 1.44MB diskette in a 720KB diskette drive? See “Types of Diskette Drives” in Chapter 1 for more information.
4.If your diskette is the right type for your drive, see if it is
5.Is the diskette formatted? A new diskette must be formatted before you can store data on it. See your operating system documentation for instructions on formatting diskettes.
6.Did you receive one of the following
If you see one of these messages, make sure the diskette is properly inserted in the drive. If the problem persists, try removing the diskette and reinserting it.
If the error message still occurs, you may have a defective diskette. Try copying the files from the bad diskette to a new diskette.