Defining a Minimal SMS Configuration

Figure 1 shows that a valid SMS minimal configuration must contain the following:

A fully-defined base configuration
A storage class definition
A storage group containing at least one volume
A storage class ACS routine
A storage group ACS routine

Figure 1. Minimal SMS Configuration

Tip: The volume does not have to exist as long as you do not direct allocations to either the storage group or the volume.

Because a storage class can be assigned using a JCL DD statement, a storage class ACS routine is not required in a valid SCDS.

Recommendation: Define a storage class ACS routine so that users do not attempt to use the STORCLAS keyword in JCL. The base configuration consists of the names for each system or system group in the SMS complex, the default management class, and the default device geometry and unit information.

The following sections describe the steps you should follow to define a minimal configuration. The figures show the sample classes, groups, base configuration, and ACS routines provided in either the starter set or Sample Classes, Groups, and ACS Routines.