PDS and PDSE data sets are limited to one volume. All other DASD data sets are limited to 59 volumes. A data set on a VIO simulated device is limited to 65␠535 tracks and is limited to one volume. Tape data sets are limited to 255 volumes.
A multivolume direct (BDAM) data set is limited to 255 extents across all volumes. The system does not enforce this limit when creating the data set but does enforce it when you open the data set by using the BDAM.