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.
Element or feature: | DFSMSdfp. |
When change was introduced: | z/OS V1R13. |
Applies to migration from: | z/OS V1R12. |
Timing: | Before installing z/OS V2R1. |
Is the migration action required? | No. It is only required to avoid MSGICH408I and MSGIGD094I RC56 RSN6 at IPL when ACDS and/or COMMDS are protected by a security product (such as RACF), and SMS is not assigned a user ID that is defined as trusted which is described in the DOC APAR OA43577. |
Target system hardware requirements: | None. |
Target system software requirements: | None. |
Other system (coexistence or fallback) requirements: | None. |
Restrictions: | None. |
System impacts: | None. |
Related IBM Health Checker for z/OS check: | None. |
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.