IBM 3270 Hardware User's Manual page 31

2. Raise the load levers on the diskette drives.
Load Levers
CAUTION
Always leave the levers up when the
diskette drive is empty.
3. Remove the cardboard protectors.
Store the cardboard in the diskette holder in
the back of this binder. You will need to put
it back into the diskette drives if you move
the system unit.
2-14 Book 1 - 3270 PC Wor1.r.. Station User's Guide