HSM_CDSB_BACKUP

Description:

Determines if DFSMShsm is configured to maintain a critical level of Control Data Set (CDS) backups. The check determines the number of CDS backup copies that have been specified to DFSMShsm via the SETSYS CDSVERSIONBACKUP(BACKUPCOPIES(x)) command.

This check is registered with IBM® Health Checker for z/OS® when the MAIN DFSMShsm host initializes on a z/OS image for the first time since IPL.

The check will run after a MAIN DFSMShsm host initializes, the CDS backup function completes on a MAIN or AUX host, a SETSYS CDSVERSIONBACKUP is issued to a MAIN or AUX DFSMShsm host (SETSYS CDSVERSIONBACKUP commands processed during MAIN host initializatin will not cause the checks to run).

This check requires a MAIN DFSMShsm host to be active on the z/OS image. If this check runs while a MAIN DFSMShsm host is not active, the check will be disabled until a MAIN host initializes.

Reason for check:

It is recommended that DFSMShsm maintain a minimum of 4 CDS backups. This practice greatly minimizes the exposure of all valid backups rolling off over the course of an extended off-shift period such as a three-day weekend.

z/OS releases the check applies to:

z/OS V1R7 and later.

User override of IBM values:

The following shows keywords you can use to override check values on either a POLICY statement in the HZSPRMxx parmlib member or on a MODIFY command. This statement may be copied and modified to override the check defaults:

  UPDATE CHECK(IBMHSM,HSM_CDSB_BACKUP_COPIES)
  SEVERITY(MED) INTERVAL(24:00) PARM('CRITVAL(4)')
  DATE(20071031)
  REASON('YOUR REASON FOR MAKING AN UPDATE.')

Parameters accepted:

Yes. The critical value of backups to check for can be adjusted. For example, PARM('CRITVAL(10)').

Default: 4 Maximum: 9999

Note that specifying a value of 0 means the check will run but will not issue an exception.

Verbose support:

Debug support:

Reference:

For more information on DFSMShsm CDS Backup, see the following:

Messages:

This check issues the following exception messages:

ARCHC0108E

See the ARCH messages in z/OS MVS System Messages, Vol 2 (ARC-ASA).

SECLABEL recommended for multilevel security users:

SYSLOW - see z/OS Planning for Multilevel Security and the Common Criteria for information on using SECLABELs.