Epson 20 - Manual (Page 135)

Diskette Problems
If you have trouble with one of your diskettes, see if any of the
following questions apply:
1. Is the diskette damaged? To find out, make a copy of the diskette.
Using this copy, repeat the operation that caused the problem. If
the operation works using the copy diskette, the original diskette
is probably damaged. Make another copy to use as a backup.
If you have trouble copying the entire diskette, some of the
sectors may be bad. Try using the COPY command to copy one
file at a time. If the diskette is copy-protected, you cannot copy it.
2. Have you inserted the right type of diskette? The diskette type
normally appears on the manufacturer’s label. In the top drive,
which has a storage capacity of 1.2MB, use 5¼-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.
If you have a second diskette drive that is also 1.2MB, follow the
same guidelines as above.
If you have a second diskette drive that has a storage capacity of
360KB, use 5¼-inch, double-sided, double-density, 48 TPI
diskettes in this drive. You cannot use 1.2MB diskettes in this
drive.
If you have a 3½-inch, 720KB diskette drive, use double-sided,
double-density, 135 TPI diskettes. You cannot use 1.44MB
diskettes in this drive.
If you have a 3½-inch, 1.44MB diskette drive, use double-sided,
high-density, 135 TPI diskettes. This type of drive can also read
and write to 720KB diskettes.
See “Types of Diskette Drives” in Chapter 4 for more
information.
A-4 Troubleshooting