The following changes are made for z/OS Version 2 Release 1 (V2R1) as updated March, 2014. In this revision, all technical changes for z/OS V2R1 are indicated by a vertical line to the left of the change.
The ZR (“zEDC Required”) and ZP (“zEDC Preferred”) options are added to the Compaction field in Defining volume and data set attributes for data class.