Primary index
You must define one primary index for each data store and initialize it with a header record.
This is an example of JCL for the scratch and creation of the primary index file:
//DELPKI EXEC PGM=IDCAMS //SYSPRINT DD SYSOUT=* DELETE OPCDEV.PKI0X CLUSTER PURGE //*---------------------------------------------------------------- //DEFPKI EXEC PGM=IDCAMS //SYSPRINT DD SYSOUT=* //SYSIN DD * DEFINE CLUSTER(NAME(OPCDEV.PKI0X)- CYLINDERS(2,1)- VOLUMES(S25PRA)- KEYS(34,0)- RECORDSIZE(77,77)- CISZ(4096)- UNIQUE- INDEXED- SHR(1,3)- FREESPACE(10,10))