Concatenated data sets used by GSAM

GSAM can use concatenated data sets, which may be on unlike device types, such as DASD and tape, or on different DASD devices. Logical record lengths and block sizes can differ, and it is not required that the data set with the largest block size be concatenated first.

The maximum number of concatenated data sets for a single DD statement is 255. The number of buffers determined for the first of the concatenated data sets is used for all succeeding data sets. Generation data groups can result in concatenated data sets.