I come from same background. I found the IBM Redbooks the best resource on SAN. Specifically Redbook: IBM/Cisco Multiprotocol Routing
I can recommend you:
I think that EMC and IBM books are free.
i came from R&S background only. for storgae the only book i used (in addtional to Brain's video) is Cisco - Storage Networking Fundamentals: An Introduction to Storage Devices