My first observations:
Writing and Tranfering files = fast
Finder Acess (opening windows, creating new folders, labeling folders) = slow

FCP5 digitizing interface = increased lag time when asking FCP to capture - program taking time to recognize capture scratch storage on the RAIDS?

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On a side note, stay away fromthose goddamn LaCie Porche drives. Are they making those fuckers anymore? The brandnewSportsHD backup LaCie 250GB Porche drive is already crapping out.

some data may not be read or written

WTF? “You’re a 2 week old drive and have never been unmounted poorly! Piece of shit….
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more info on troubleshooting firewire drives