Figure 2-6 SMS Dataclass Construct for extended format and extended addressability GLYPH<SM590000> In ISMF create a new STORCLAS construct or reuse an existing one to ensure that the  VSAM linear data sets become SMS managed. Only the storage class needs to be  defined. There is no requirement for special parameterization. GLYPH<SM590000> There is no need to use a MGMTCLAS construct for backup and expiration  considerations. GLYPH<SM590000> Depending on your SMS rules, create a new STORGRP construct or reuse an existing  one where you put all your 3390 volumes for the zCX data sets. We recommend that you  create a dedicated volume pool for all of the zCX volumes that you plan to use. GLYPH<SM590000> Define SMS ACS routines to associate your zCX data sets to the correct data class,  storage class, and storage group. Example 2-5 shows you how to code the SMS ACS  routine for a data class. Your storage management colleagues might want to perform  these steps based on your information. Example 2-5 Example of an SMS data class routine for zCX data sets PROC DATACLAS FILTLIST ZCX INCLUDE(ZCX.**) /*  */ /**********************************************************************/ /*  */ SELECT  WHEN (&DSN EQ &ZCX) DO WRITE 'DSORG = ' &DSORG IF &DSORG = 'VS' THEN SET &DATACLAS EQ 'VSAMLSX' ELSE SET &DATACLAS EQ '' END  END END  30  Getting started with z/OS Container Extensions