Advanced Topics › Product Termination Considerations › Local Shutdown Processing › CA MIA Activities During Local Shutdown › Local Shutdown Procedure

Local Shutdown Procedure

This section describes a step-by-step local shutdown procedure. To avoid data integrity exposures, we recommend the following procedure to safely stop CA MIA on one local system in the complex:

1. Quiesce tape activity on the local system.

   This process may include steps such as draining tape class initiators, quiescing online systems, and so on.

2. Issue the following command on the local system:

   SHUTDOWN LOCAL
   

3. Issue the following command for the local system on an external system:

   FREE 
   

   Note: The SHUTDOWN FREE command would replace Steps 2 and 3.

4. Determine what tape devices are to be used by the local system when tape processing on that system is restarted.
5. Issue the following command on an external system for each device identified in Step 4:

   VARY NOTAVAILABLE GLOBAL
   

6. Wait for all VARY NOTAVAILABLE GLOBAL commands issued in Step 5 to fully complete.

   This includes waiting for any necessary deallocations to occur and each device to be taken offline on all systems.

7. Issue the following z/OS command on the local system for each device identified in Step 4:

   VARY ONLINE 
   

8. Restart tape processing on the local system.
9. If any further devices are needed by the local system, repeat Steps 4 through 7 for each device.

WARNING! If you issue a z/OS VARY command for a device on the local system (Step 7) without previously issuing a VARY NOTAVAILABLE GLOBAL command for the device on an external system (Steps 5 and 6), it may create data integrity exposures. The same is true for replying with a device name to an IEF238D WTOR.