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