You can write striped extended-format sequential data sets with the maximum physical block size for the data set plus control information required by the access method. The access method writes data on the first volume selected until a track is filled. The next physical blocks are written on the second volume selected until a track is filled, continuing until all volumes selected have been used or no more data exists. Data is written again to selected volumes in this way until the data set has been created. A maximum of 59 stripes can be allocated for a data set. Selecting Volumes for Striped Extended-Format Data Sets describes how the system selects the volumes used to allocate striped extended-format sequential data sets.

For striped data sets, the maximum number of extents on a volume is 123.