The non-VSAM volume record (NVR) is equivalent to a VVR record, but the NVR record is for SMS-managed non-VSAM data sets. The NVR contains SMS-related information.

If an SMS-managed non-VSAM data set spans volumes, only the first volume contains an NVR for that data set. See Figure 1.

Figure 1. Non-VSAM Volume Record (NVR) Structure