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I will say one more word about it: we all should beware becoming lulled by a mirrored array on this score: if it causes us to put off REAL backup for a week, two weeks, whatever....if the entire rig is stollen or melted down or something....all is lost back to the last REAL backup.

That's what NFS + cron + an old beat-em-up Linux box in a closet (w/ a couple really big HDD's in it) does for me - provides a nightly backup of all my goodies :)

/P