By design, CA MIA serializes allocation of tape devices across multiple systems. Therefore, we recommend that CA MIA be started before any tape allocation is allowed to occur on any system in the MIMplex.
For CA MIA to start successfully, at least one device must be defined to the product. When 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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