ARC0264A
{MCDS|BCDS} CLUSTERS CHANGED FROM m TO d. IF NOT INTENDED, STARTUP WILL RESULT IN CDS CORRUPTION. INTENDED? (Y OR N)

Explanation

During initialization of this DFSMShsm host, a conflict was detected between the number of clusters defined for the control data set (CDS) type (MCDS or BCDS) specified in the message. The Multiple Host Control Record (MHCR) has the most recently used number of clusters for the BCDS and MCDS. The recorded number of clusters for this CDS is m. The number of clusters specified to this host in the startup JCL is d.

This conflict should only occur when a CDS has been reorganized into a different number of clusters. Otherwise, this conflict will result in records being written to the incorrect cluster. Data managed by DFSMShsm may be unavailable to some hosts.

System action

DFSMShsm waits until a reply is received.

If the reply is Y, DFSMShsm is allowed to initialize with d clusters.

If the reply is N, DFSMShsm is terminated.

Operator response

If this message is observed after a change was made to the number of clusters for the CDS type reported in the message, verify the value of d is consistent with the new number of clusters. If so, reply Y. In a multiple DFSMShsm host environment, this message should only be issued during initialization of the first host after the clusters have been reconfigured.

If either the CDS clusters were not reconfigured or if the message is issued more than once for the same CDS type after the CDS clusters were reconfigured, DFSMShsm has detected a configuration error. Compare the number of CDS DDs specified in the startup JCL of each DFSMShsm host that is or will be active within this HSMplex. All hosts within an HSMplex must specify the same number of CDS clusters for a given CDS type.

Source

DFSMShsm