Physical data set volume allocation notification exit (Eioption 30)

This exit indicates to the UIM that allocation to the specified SMS volume failed during physical data set RESTORE or COPY. The exit is given control through the UIM, after the allocation attempt for each data set attempted. DFSMSdss provides the UIM with information through the EIREC30 structure within the exit identification block, ADREID0. EIREC30 is shown in ADREID0 data area.

The actual call includes the following information:

Tracks required
Overall exit return code
Pointer to list of volumes
Number of volumes in array
VOLSER
Volume attempted flag
Volume used flag
Volume return code
Volume reason code

The UIM presents a return code to DFSMSdss in the Exit Identification Block. DFSMSdss continues to process based on that return code, as follows:

00: DFSMSdss continues normal processing.
16: The record has been modified.
20: Disconnect exit.
32: End function.