SMUCSE 8344 Storage Area Networks

SMUCSE 8344 What’s SANs

SMUCSE 8344 SAN Solutions Server consolidation Storage consolidation Port consolidation Tape consolidation Distance

SMUCSE 8344 SAN Hardware

SMUCSE 8344 Switches and Hubs FC-AL and Switching Fabric (non-blocking)

SMUCSE 8344 FibreChannel How SCSI Limitations are Addressed –Speed –Distance –Device Count –Access

SMUCSE 8344 FibreChannel – Speed 266 Mbps – ten years ago 1063 Mbps – common in Mbps – available today 4 Gbps – near future products –Backward compatible to 1 & 2 Gbps 10 Gbps – 2005?

SMUCSE 8344 I/O Protocols over IP IP Networking is ubiquitous Gigabit ethernet is here –10Gbps ethernet is just becoming available Don’t have to invest in a second network –Just upgrade the one you have IP & Ethernet software is well understood –Existing talent pool for vendors to leverage Developers, not end-user Network Engineers

SMUCSE 8344 FibreChannel – Distance 1063 Mbps –175m (62.5 um– multi-mode) –500m (50.0 um– multi-mode) –10 km (9 um– single-mode) 2125 Mbps –500m (50.0 um– multi-mode) –2 km (9 um– single-mode)

SMUCSE 8344 FibreChannel - Topology Point-to-Point –Direct Connection of Server and Storage Node Arbitrated Loop –Up to 126 Devices in a Loop via NL_Ports –Token-access, Polled Environment (like FDDI) Fabric –Arbitrary Topology –Requires At Least One Switch –Up to 15 million ports can be concurrently logged in with the 24-bit address ID. –Dedicated Circuits between Servers & Storage via Switches

SMUCSE 8344 Other Features/Issues Backup –LAN-free, server-less Replication –Synchronous/Asynchronous Server Clustering Volume and File Management