What’s you zoning look like? Wide open? 1 to 1?
Also are the card/switch/os configs supported by the SAN?
One awesome thing about FC (and I actually prefer FC over iSCSI for SAN configs) is, and I’m sure many already know this :), the compatabilty issued are a blast to work through. Strange things happen with stuff that is not comparable.
SAN vendors literally have whole teams and labs devoted to “plug fests” where all sorts of different combos of cards, switches, OSes, are tried. You should see the labs where this is done… I don’t think I have ever seen so much fibre in my life 🙂