So, in older versions of TSM (5.x) I've been accustomed to multiple mount requests firing off in parallel. You initiate reclamation, there's MEDIAW until the process can glom onto two mount points, and then both mount requests happen simultaneously.
In my v6 infrastructure, both mount points are RESERVED, but the mount request for the second MP doesn't get dispatched until the first is complete. This serialization can waste a lot of wall-clock time. Does anyone on the list know a reason for this to be so? It seems an odd change. - Allen S. Rout