Epson EQUITY 3865X/20 PLUS - Manual (Page 197)

9. If you see no error messages but
there
is something wrong
with the data in a file, MS-DOS or an application program
may have updated the storage information on the diskette
incorrectly. This is probably the case if you have one of
these problems:
Part of a file is missing
A file includes parts of other files
An expected output file is missing.
To make the necessary repairs, use the MS-DOS program
CHKDSK. See your MS-DOS Reference Manual for
instructions.
Diskette Drive Problems
You may see the following message if you are having trouble
with a diskette or your diskette drive:
601 Diskette error
If you see this message or have difficulty with a diskette drive,
follow these steps:
1. Try running the Diskette Drives and Controller Check
described in Appendix C. If the diagnostics program
indicates an error, consult your Epson dealer.
2. If the diskette drive is making loud noises, do not attempt
any further examination of it. Contact your Epson dealer.
Note
Diskette drives may make different sounds with different
diskettes.
A-18 Troubleshooting