Explanation: CDSVERSIONBACKUP is an optional parameter that you use to specify whether or not DFSMShsm should back up the control data sets to multiple data sets. The multiple backup copies give you a history of the control data sets and the journal data set. The number of backup copies kept is determined by the BACKUPCOPIES subparameter.
In a multiple-DFSMShsm-host environment, all hosts sharing DFSMShsm control data sets must specify the same options for the SETSYS CDSVERSIONBACKUP command, as the information is stored in the MCDS. The last DFSMShsm host to issue the SETSYS CDSVERSIONBACKUP command controls how all the hosts back up the CDSs. An alternative to having all DFSMShsm hosts specify the same options for the command is to have only one host (usually the primary host) specify the command. If you use the same ARCCMDxx PARMLIB member for all hosts, you can use the ONLYIF command in that member to restrict the SETSYS parameter to one host.
If you specify CDSVERSIONBACKUP while DFSMShsm is backing up the control data sets and journal data set, the parameter does not take effect until after DFSMShsm has finished backing up the control data sets and journal data set.
SMS relationship: Parameter has the same meaning when applied to SMS-managed or non-SMS-managed DASD volumes or data sets.
SETSYS default: None.