I have job like..
step 1. creates an empty file with space alloc given as (TRK(50,50),rlse). But the uses only 1 trk and releases all the remining.
step2. Calls a program that populates the file with records.
will this file will then be able to extend to all 50 tracks in primary?..and then secondery accordingly?..or only secondery extension is possible?...