Hi all, Thanks for replying. A NAS is not what I need. I work in an airport where I would like to have 2 sites linked with fibre, that constantly communicate and synchronise their data. I have heard about running server operating systems off a SAN also and have it so that when you lose a server, another box can take over. I may be talking about the million dollar solutions without realising it though. Thahs not really important either ATM. But what we really need is a SAN solution that can replicate data between two sites, have a good backup solution and make it one we can expand in the future. I will look more into Dell, as all our servers are Dell. Does this really help the situation, having the sane manufacturer for servers and SAN? Thanks Ripken, I will have a look at that wiki also Good work, I have plenty to read for now