Ahh..well .. you could install linux on the Xserve machines, or attach linux machines to the Xraid. The fact that OSX doesn't have anything like LVM built in.. or the fact that Xsan takes up that much disk space for journaling is kinda lame. I wonder where the code for Xsan came from.
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80gig red mk2 -- 080000125
(No, I don't actually hate Alan Cox)