Data Control Block (DCB) Requirements

The DD statements you code in the JCL for an EREP run define and allocate storage for the data sets EREP uses.

The input (ACCIN) and output (ACCDEV) data sets have special DCB requirements as shown in the following table:

Data set	DCB requirements
ACCIN	If the data set resides on an unlabeled tape volume or is not included in a data set control block (DSCB) you must supply the RECFM and BLKSIZE values.
ACCDEV	If your ACCDEV data set is not specified via your System Managed Storage ACS routines, refer to the JCL Reference Manual, values are provided here for example.

Note:

The blocksize for a tape data set must be at least 2004.
A blocksize of 6144 for a DASD data set allows for the various blocking factors among DASD and improves performance.
Refer to the JCL manual for your system for more information.