Maximum Size on One Volume

Many types of data sets are limited to 65␠535 total tracks allocated on any one volume, and if a greater number of tracks is required, this attempt to create a data set will fail.

Data sets that are not limited to 65␠535 total tracks allocated on any one volume are:

A large format sequential; but cannot occupy more than 16␠777␠215 tracks on a single volume.
Extended-format sequential
UNIX files
PDSE
VSAM

If a virtual input-output (VIO) data set is to be SMS managed, the VIO maximum size is 2␠000␠000 KB, as defined in the Storage Group VIO Maxsize parameter.