Epson LT - 286e - Manual (Page 38)

Sequential R/W Test
This test checks the sequential seek, read, and write capabilities
of a floppy disk drive. It performs a sequential read/write
operation on the diskette in the specified drive.
To perform this test, insert a diskette into the drive you plan to
test. Use a diskette you have formatted with the Diskette
Format test.
This test destroys all data on the diskette.
Disk Change Line Test
This test checks the status of the disk change line. This line
should change when you insert or remove a diskette from a
floppy disk drive.
To perform this test, insert a diskette into the drive you plan to
test. Use a diskette you have formatted with the Diskette
Format test.
Floppy Disk Error Messages
DIAG displays two types of error messages while testing the
floppy disk drive: messages DIAG generates and those the
controller generates.
DIAG may display the following error messages during the Disk
Change Line test:
W a r n i n g - Change line inoperational
DIAG displays this message if the line is not working
properly. This may indicate a problem exists with the floppy
drive or the controller.
System Diagnostics 33