In general, it's a good idea to keep data file systems out of the root volume group (rootvg). That makes the OS backup—created by the mksysb command—smaller, faster to run, and easier to restore. If you have to restore your OS in an emergency, you want the process to be as fast and smooth as possible. In some environments, systems admins have no choice but to work with a rootvg that contains a lot of data they don't really want to back up as part of the OS. If you have ...

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