If a cluster is closed, one record is written for each component in the cluster.
Record type 64 indicates why the record was created (a component was closed, another volume was switched to, or no additional space was available). It describes the device and volume(s) on which the object is stored, and gives the extents of the object on the volume(s). It gives statistics about various processing events that have occurred since the object was defined, such as the number of records in the data component, the number of records that were inserted, and the number of control intervals that were split.
This record identifies the job by job log identification and user identification. The job name, time, and date that the reader recognized the JOB card (for this job) constitute the job log identification.