The IGDSMSxx, IEASYSyy, and IEFSSNxx members of SYS1.PARMLIB direct the initialization and activation of SMS. IGDSMSxx provides initialization parameters to SMS. The SMS=xx parameter of IEASYSyy indicates the name of the SYS1.PARMLIB member IGDSMSxx that is used for initialization. For example, if SMS=01 in IEASYSyy, then the IGDSMS01 member of SYS1.PARMLIB is used during initialization. The SMS entry in IEFSSNxx identifies SMS to z/OS®.

For information about how to create an IGDSMSxx member in SYS1.PARMLIB and how to define SMS to z/OS through IEFSSNxx, see z/OS MVS Initialization and Tuning Reference.