Look for a pre-built 3-unit rackmount server

The easiest solution, if you can find one that fits your network, is to find a pre-built 3U rackmount server. Pre-built servers are generally produced by traditional computer manufacturers, and take most of the guesswork out of configuring your new server. With a pre-built solution, your server will arrive ready to plug in and use. In addition, by buying direct, you will receive great support and warranty plans from the manufacturer.

I recommend: MPC has a great 3U rack server that can be configured with additional options to suit your needs. For Mac users, Apple offers the Promise RAID, a 3U storage server that fully integrates with Mac OSX.

Determine whether a custom 3U rack server is your best option

For those of you who have more specific requirements for their new server, a custom-built 3-unit rack server will likely be your best option. When you build a custom server, you get to work in conjunction with your manufacturer to have a server that is tailored to your network's needs. Having a customized server will prolong the need for expansion or changes.

I recommend: FreedomTechnologies is one of the most well-known custom 3U rackmount server providers, and offers a great solution to build your server from scratch. Aberdeen is another reputable company that offers several custom options for a 3U rack server.

Comparison shop for 3U rack servers from third-party retailers

Your final option is to do some comparison shopping for 3U rack servers from a reputable retailer. Most dealers sell a wide variety of server options, which can be configured to your standards. Make sure you choose a retailer that will give you technical support, as well as a solid warranty.

I recommend: TigerDirect and PC Connection are reputable 3U rack server vendors with a diverse selection of customizable 3U rack servers.