The storage management subsystem (SMS) is a DFSMSdfp facility designed for automating and centralizing storage management. SMS automatically assigns attributes to new data when that data is created. SMS automatically controls system storage and assigns data to the appropriate storage device. ISMF panels allow you to specify these data attributes.

This chapter describes the ways that you can assign attributes to data sets and objects through the SMS classes and storage groups, and automatic class selection (ACS) routines.