More Xserve RAID info:
http://images.apple.com/xserve/raid/...choverview.pdf
http://images.apple.com/xserve/raid/..._datasheet.pdf
more fibre switches:
http://www.sandirect.com/brocadepage.htm
http://www.sandirect.com/emcswitches.htm
fibre channel info
http://www.storagesearch.com/fcswitches.html