In addition to the operands described in z/OS DFSMS Macro Instructions for Data Sets for the DSORG parameter of the DCBD macro, you can specify the following operand:

DSORG=XA or XE

Specify the section of the DCB to be mapped.

XA

Specifies a DCB with the foundation block and EXCP interface.

XE

Specifies a DCB with the common interface, foundation block extension, and foundation block.