DFSMSdfp: Verify REUSE option of SMS control data sets

Description: It is recommended to verify if the SMS control data sets ACDS and COMMDS are defined with the REUSE option. Starting with z/OS V1R13, ACDS and COMMDS are automatically altered to REUSE during the SMS address space initialization when they are detected to be defined as NOREUSE. This requires appropriate authority for the SMS address space if these data sets are protected by RACF DATASET class profile.

Steps to take: If ACDS and COMMDS are defined with the REUSE option, or SMS is defined with the appropriate authority, no action is required. If the ACDS and COMMDS are defined with NOREUSE, they are protected by a security product such as RACF, and SMS is not assigned a user ID that is defined as trusted, ACDS and COMMDS may be altered to REUSE with a batch job by an authorized user. This action is only required to be performed once.

An example for an IDCAMS job doing an ALTER REUSE:

//STEP1    EXEC PGM=IDCAMS                                 
//SYSPRINT DD   SYSOUT=*                                   
//SYSIN    DD   *                                          
    ALTER  -                                               
      sms.cdsname  -                                       
      REUSE                                                
/*                   

Reference information: None.