I think I understand you now.

On the one filesystem, I have 3 devices/volumes (unix, Linux, notes) and the 
one staging policy. This staging policy is set to stage from all 3 devices.

So if the staging policy just "sees" save sets that exist somewhere under the 
filesystem then it should work as I expect.
However, if it "sees" and treats save sets differently under each volume then I 
can see a problem.

I'm not sure about automating the staging. The thresholds are tight so I would 
need to look for some patterns before I looked at doing this manually.

When you say that you do not use staging bu cloning, do you use nsrstage -S 
ssid/cloneid  or do you actually clone and then delete the save sets?

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