Diskette Insertion And Removal - IBM 3274 51C Maintenance Information

There are 77 tracks on each side of a diskette. Track
~O,
which is the outside track, is reserved as a label track and
cannot be used for data. Tracks 75 and 76, the two tracks
nearest the hub, are reserved as alternative tracks and can
be used for data only if another track becomes damaged.
There is a total of 74 tracks on one side of a diskette 1
available
fpr
recording data.
A sector is that part of a track used for one record of
information ..
Figure E-3. Diskette Insertion'
Operator knob in
the closed position
A cylinder is defined as the tracks of a diskette that can
be read from or written on without moving the read/write
heads.
E.1.1.2 Diskette I nsertion and Removal
To insert or remove a diskette, proceed as follows:
A. Diskette Insertion (See Figure E-3)
1. Turn the operator knob to the open position.
2. Remove the diskette from its envelope.
3. Place the diskette squarely into the diskette drive
(with the label facing the knob).
4. Turn the operator knob to the closed position.
B. Diskette Removal (See Figure E-3)
1. Turn the operator knob to the open position.
2. Remove the diskette.
3. Insert the diskette into its envelope.
Diskette Label
o
Operator knob in
the open position
Appendix E. IBM 31SD Diskette Drive Maintenance E-S