Enhanced data integrity can prevent users from concurrently accessing a shared sequential data set on DASD for output or update processing, thus avoiding any resulting loss of data. You can activate enhanced data integrity by creating an IFGPSEDI parmlib member.
When you activate enhanced data integrity, you can request that multiple users no longer have concurrent output or update access to a sequential data set on DASD. Enhanced data integrity applies only to sequential data sets. Authorized applications can exclude their sequential data sets from enhanced data integrity protection. For information about how to exclude sequential data sets from enhanced data integrity, see z/OS DFSMS Using Data Sets.
If you do not need enhanced data integrity, do not create the IFGPSEDI member of SYS1.PARMLIB.