Not sure if this is your problem, but:

I've found on our 7.3.3 setup that if you try to stage more than 25 savesets at 
a time - either with nsrstage using "-f filename.txt" or multiple "-S" that the 
staging just locks up.  It does this also using the GUI staging - when it tries 
to stage more than 25 savesets the process hangs.

I got around this by scripting nsrstage like this:

mminfo -q "volume=Volume" -r "ssid" | head -25 >/tmp/stage.txt

nsrstage -b "Pool" -m -S -f /tmp/stage.txt && nsrstage -C -V "Volume"


Hope this helps!

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