This is a bit of a 'how long is a piece of string' question.
The big question is what's in rootvg, I assume that none of your Oracle stuff is, in which case, not very much. I've been forced to store data in rootvg (oraclevg got full and they won't let me buy any more disks) so for me, it's getting the syntax of /etc/exclude.rootvg right.
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Columb Healy