This topic describes how to use storage groups for DFSMSrmm scratch pooling.

Before you begin: To use SMS tape storage groups, first define tape storage groups using ISMF. To define tape storage groups, you must have at least one system-managed tape library defined to ISMF. The library can be an automated tape library or a manual tape library. If you do not have a system-managed tape library or do not want to associate the new SMS tape storage groups with an existing library, define a new dummy library to ISMF. Use the ISMF define library application to define a system-managed tape library. Use a dummy library ID to identify the library and use appropriate values to complete the other data fields required for a tape library definition. When you define a dummy library, OAM issues the CBR3006I and CBR3002E messages at startup time. Ignore these messages when they are issued for your dummy library. Once you have defined the dummy library, you do not need to start OAM or define the OAM1 subsystem to support this dummy system-managed library.