For driving system z/OS V1R13 or z/OS V2R1 and SMS managed data set
For UNIX file system data sets larger than 4 GB,
if you change HFS to ZFS , Figure 1 will
be displayed. This panel is also displayed when the global Change
command is used. The information that zFS file system is larger than
4 GB, and that it must be SMS managed with a Data Class that includes
extended format and addressability is displayed. The User will have
the option to confirm the request or to cancel it. 
Figure 1. Panel: Verify data set type change
CPPP60E2 CMD ------ Verify Data Set Type Change ( RF001230 ) ------
COMMAND ==>
OMVS.ROOT
The zFS or VSAM file system is larger than 4GB, and it must be
SMS managed with a Data Class (defined with Extended Format and
Extended Addressability) and a Storage Class.
Do you want to change the Data Set Type (Yes or No)
==>
Press Enter to continue or End to cancel
The user will need to provide Data Class with extended addressability. If the user has already provided Data Class for the data set, Figure 1 will be displayed with pre-populated Data Class.