Since xvmadm does not have a command option like xbpadm does, such as # xbpadm -commands &, try using the robtest utility. /usr/openv/volmgr/bin/robtest. Then, select your library. Type a "?" to get the list of options to use. I have to do this when a tape is stuck and xvmadm does not recognize the tape.
You should be at a blank prompt. Type "mode" to do a mode sense. Then do your eject or move, such as "m d1 s1". (Move media in Drive 1 to Slot 1. Not sure if this is what you are looking for. Just trying to help. You can probably experiment with this and get something to work.