About exchanging a volume
You should exchange a volume (replace one volume with another volume) if a volume meets any of the following conditions:
Full (in this case, to exchange a volume means to remove the volume from a robotic tape library).
Past the maximum number of mounts.
Old (past the expiration date).
Unusable (for example, because of repeated media errors).
Depending on whether you want to reuse the old media ID or not, follow one of the exchange volumes processes in the following subsections.