Epson EQUITY 386/33 PLUS - Manual (Page 161)

4. If your diskette is the right type for your drive, see if it is
write-protected. On a 5¼-inch diskette, there may be a
write-protect tab over the notch on its side or there may be
no notch. On a diskette, the write-protect switch
may be set to the write-protect position or there may be no
switch. You cannot alter data on a write-protected diskette.
(Some application programs do not function properly if the
diskette is write-protected. Check the program manual.) See
Chapter 1 for information.
5. Is the diskette formatted? A new diskette must be formatted
before you can store data on it. See your operating system
manuals for instructions on formatting diskettes.
6. You may have entered an incorrect diskette drive type when
you ran the SETUP program Run SETUP again to check the
setting. See Chapter 2 of the Setup Guide for instructions.
7. Did you receive one of the following MS-DOS error
messages?
Disk Drive Error: Abort, Ignore, Retry?
Disk error reading drive d:
Disk error writing drive d:
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.
Troubleshooting C-13