The MIM2207I highlighted message is issued when CA MIA intercepts the z/OS SSI call indicating the start of a tape SWAP. This message provides the name of the job and the FROM device involved in the SWAP. The MIM2207I message is issued early in the SWAP process, before CA MIA begins serialization of the SWAP and before any z/OS SWAP messages are issued. The MIM2207I message is informational in nature and is deleted automatically by CA MIA as part of the SWAP progresses. The MIM2207I message remains highlighted until CA MIA issues the MIM2208I or the MIM2209I message or the swapping task ends. The MIM2207I message can be very helpful in detecting the presence of a SWAP when tape allocation delays arise due to a delay in SWAP processing. Because the MIM2207I message is issued early in the SWAP process, before the z/OS messages, the MIM2207I message may be the only external indication that a SWAP is occurring.
If the MIM2207I message remains outstanding for an extended period of time, then it may indicate a delay in the ability of CA MIA to serialize the SWAP or outstanding SWAP WTORs are not being responded to in a timely manner. Because delays in SWAP processing can lead to delays in tape allocation, the cause of the delay in SWAP processing should be investigated.
The MIM2208I highlighted message is issued when CA MIA intercepts the z/OS SSI call indicating that DDR is ready to switch the UCBs of the FROM and TO devices. At this point in the SWAP, DDR has chosen a final TO device. Therefore, the MIM2208I message includes the name of the TO device as well as the FROM device and job name. CA MIA has completed serialization of the SWAP and the SWAP is close to completion. The MIM2208I message is informational in nature and is deleted when the MIM2209I message is issued or when another MIM2207I message is issued in the case of a recycled SWAP or when the swapping task ends. A SWAP recycles if DDR finds a problem with the final TO device chosen or the tape after the UCBs have been switched.
The MIM2209I non-highlighted message is issued when CA MIA intercepts the z/OS SSI call indicating that DDR is in the final stages of the SWAP and the SWAP is completing. At this point, the involvement of CA MIA with the SWAP ends.
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