Recognizing the importance of complete SMF data to the recovery process, the most significant function of CRURRSV is to assist in verifying that all required SMF data is present, that is, that no SMF data has been omitted or lost. Gaps in SMF data longer than a user-specified interval are noted, as are any SMF "lost data" records. SMF IPL, EOD, and SWITCH records are logged to aid in the resolution of gaps.

SMF dump data sets from all systems having access to the catalog, covering the user-specified recovery start and stop times are needed as input. In multi-system installations, a clock difference value supplied by the user is used to adjust the start and stop times to ensure that all SMF records needed for recovery are selected. The outputs from CRURRSV are a set of reports, a log of significant events encountered and an output data set containing the SMF records for the catalog to be recovered. The log and the reports are used to assess the completeness of the SMF input data.

It is also possible to select records for all catalogs, as an alternate method of SMF catalog record collection or in the unlikely event that multiple catalogs are to be recovered.