You can verify that the data has been migrated successfully using the dual-mode facility (DMF), which is described in The dual mode facility (DMF), and the VIDREAD utility. Sample JCL using the VIDREAD utility program follows:
//CHECKIT EXEC PGM=VIDREAD
//STEPLIB DD DSN=appl.drivers.load,DISP=SHR
// DD DSN=VID.SVIDLODE,DISP=SHR
//SYSPRINT DD SYSOUT=*
//FILEINV DD DSN=appl.base.cluster.file,DISP=SHR
//FILEIN@ DD DSN=appl.base.cluster.file.DUMMY,DISP=SHR
//FILEIN DD SUBSYS=(ssi,db2id,dimname,FILEINV)
//VIDTRCE DD SYSOUT=*
//VIDTRCEP DD *
TRACE P01,P03,P04,P05,P08,DIM=dimname
//
The DD statement FILEINV defines the original VSAM data set and is specified as the fourth SUBSYS parameter to enable DMF. You can choose any DD name. Note that you must use different VSAM data sets for FILEIN@ and FILEINV to avoid potential VSAM sharing issues. See Additional DD statement for dummy VSAM data set for details concerning the FILEIN@ DD statement.