OTOH, it seems like a hack that WAIT does something completely non-intuitive (and not so useful). Guess I need to write another requirement for DFSMS/VM to add a "really wait for the mount to finish before returning" option.
Since WAIT is already used (and probably stuff out there depends on it's current usage), anyone have an objection to SYNC as the proposed option, with the semantics being that the DFSMS MOUNT command with the SYNC option waits until the actual mount completes before executing the supplied command?