Epson Apex 20020 - Manual (Page 188)

The computer spins the diskette for a few seconds and then
displays a message like this:
The disk rotation, speed is now 360.5 rpm.
The diskette continues to spin and the message listing the
rotation speed is updated every few seconds. To stop the test,
press any key; the program returns to the menu.
If you try to perform a speed test without inserting a diskette, or
if a read error occurs, you see this message and prompt:
Disk is defective or not installed properly.
Press ENTER to return to the menu.
Disk Change Check
This check tests the ability of a drive to detect that a diskette
has been inserted or removed. Disk changes cannot be detected
by a 360KB diskette drive.
Select option 5 from the menu to start this test. First the
program checks the selected drive type; if the drive is a 360KB
drive, you see these messages:
Drive d is a 360KB drive.
DISK CHANGE is not allowed with this type of
drive.
Press ENTER to return to the menu.
When you run the test for a 1.2MB, 720KB, or 1.44MB drive,
you see this prompt:
Remove the disk from drive d.
Release the disk drive latch, and remove the diskette. You see:
Re-insert the disk into drive d.