For SMS support of the tape library, an SCDS of the proper level must be activated. This SCDS must contain appropriate library definitions and tape storage group definitions. Information that the storage administrator must provide specifically for an Automated Tape Library Dataserver (ATLDS) or manual tape library (MTL) is listed below. See z/OS DFSMS Implementing System-Managed Storage for more information about MTL and ATLDS.

• Data compaction, media type and recording technology information can be included in data classes that are used in allocation of devices in a tape library.
• New storage groups of type TAPE must be defined. The storage groups are involved in the allocation of new data sets to volumes within a tape library.
• A tape library must be defined in the SCDS.
• Default data class defined to the library.
• ACS routines must specify a storage class and the storage group selected must be associated with a tape library.