Container use is optional and adds an additional level of complexity to your storage management system. The container option specifies that you want to store media in physical containers at specified locations, and to use the containers to move the media.
A container class refers to the type of container used to store or move media, for example, a box or a bin. You must create container classes if you intend to use containers. You can base your class definition on the storage capacity of the container. For example, you might create a container class that is called CONT8MM20 to house 20 8mm tapes.