Since then he has migrated storage for other systems to the SAN, including secondary SQL databases and Microsoft Exchange. In summer 2006, he started a new project, replication, for which he bought a new PS 3600 and EqualLogic replication software. "We now have two equal architectures, and we are replicating our database every five minutes."

Right now both of these are at the home site in Westmont, Ill., but in April, Leather says one will move more than 800 miles to a secondary site. "This will be iSCSI over 10Mb metro Ethernet," he says. "Robust disaster recovery. By the second half of 2007, we plan to have full two-way replication, two fully redundant hot sites. By the end of the year, we plan to have load balancing as well." In that same time frame, Leather also plans to start testing virtualization.

So far, Leather has had no major problems, but he recommends that before you consider iSCSI, you look carefully at one thing. "If you have not made major improvements to your network infrastructure in the last three years, you had better do it. We were OK since we had put in Gigabit Ethernet with a new switch a few years back."

The right infrastructure helped sell Dan Brinegar, IT administrator for beer distributor House of LaRose, on iSCSI. "We had moved into a new building and so were able to design our own network, all Gigabit Ethernet," Brinegar says. "We also bought Catalyst 4500 switches that allow routing."

The routing let Brinegar segment his iSCSI traffic from his production network. This is an important consideration as iSCSI's greatest strength, the fact that it can run over your standard IP lines, can also be a weakness if storage traffic drags down mission-critical systems.