Epson 3865X Plus User Manual page 278

4. Check to see if you have inserted the right type of diskette.
The diskette type normally appears on the manufacturer's
label. Here are the guidelines:
5 +-inch, double-sided, high-density, 96 TPI diskettes.
You can also use 360KB diskettes in this drive, but if
you write to a 360KB diskette in this drive, you may
have trouble using the diskette in a 360KB drive later.
3 %-inch, double-sided, high-density, 135 TPI diskettes.
This type of drive can also read and write to 720KB
diskettes.
5 %-inch, double-sided, double-density, 48 TPI
diskettes. You cannot use 1.2MB diskettes in this drive.
3 '/z-inch, double-sided, double-density, 135 TPI
diskettes. You cannot use 1.44MB diskettes in this
drive.
See "Types of Diskette Drives" in Chapter 3 for more
information.
5. If your diskette is the right type for your drive, check to see
if the diskette is write-protected. On a 5 '/,-inch diskette,
there may be a write-protect tab over the notch on the
side of the diskette or there may be no notch at all. On a
3 '/z-inch diskette, the write-protect switch may be set to the
write-protect position or there may be no switch. You
cannot store or revise data on a write-protected diskette.
See Chapter 3 for information on write-protecting diskettes.
Some application programs do not function properly if the
diskette is write-protected. Check the program manual.
Troubleshooting
D-17