External labels are affixed to the tape reels and cartridges to provide visual identification of the volume and its contents. Normal tape volume control may require several types of external tape labels. One is a permanent label that identifies the reel or cartridge; the other is a temporary label that identifies the contents. A third type of label, the checkpoint security label, may be applied to tape reels or cartridges that contain checkpoint data sets.

To write on external labels, you should use a pen or a felt-tip marker that does not produce loose residue. Do not use a lead pencil. Do not use an eraser.