The hard part is the cost. Unlike at home, there are a few more things required: Those might include (but not limited to): local RAID (*) mirror to remot

The hard part is the cost. Unlike at home, there are a few more things required: Those might include (but not limited to): local RAID (*) mirror to remote-site versioned backup off-site backup archives And every piece of that puzzle needs its own: fiber ethernet physical space cooling electricity management (support team) All the above need be redundant and enterprise quality (to minimize downtime and errors). Someone once told me the price calculated for each GB. I thought he was crazy, and then did the math myself. (he was quite sane) (*) or more commonly storage arrays from HDS/IBM/etc, which start at 100K+ and go north (way way way north)