After the dump completes, you will receive an IEA911E message indicating whether the dump was complete or partial. If it is partial, check the SDRSN value. If insufficient disk space is the reason for the problem, delete the dump, allocate a larger dump data set, and request the dump again. For more details on message IEA911E, see z/OS MVS System Messages, Vol 6 (GOS-IEA).