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By design, CA MIA serializes z/OS allocation across multiple systems. Therefore, we recommend that CA MIA should be started before any tape allocation is allowed to occur on any system in the MIMplex.
For CA MIA to successfully start, at least one device must be defined to the product. If no devices are defined to CA MIA, it issues a MIM2003 NO MANAGED DEVICES message when started, then abends with a U0040 RC=66 at startup.
GTAF and TPCF do not vary devices online or change the status of a device unless you specified VARY commands in the parameter data set and synchronization has completed.
GTAF delays tape allocations on an active system until synchronization is complete.
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