A reason why many users and businesses select a rack server rather than other forms is due to the area savings by using a rackmountable server. Having a rack design, all the hardware components are smaller so that they take less space. For instance, I/O cards won't be full size. They will only support the miniature version of the I/O bus. Which means each card set up in the server won't take much space.
Using less physical space can be quite important for many businesses, especially if the server will probably be located in a data center where space reaches a premium. Almost nobody will choose a tower server at a data center given that they take up an excessive amount of space within an inefficient manner.
Another reason why many businesses decide to buy a rack server happens when it's important to have a lot of local hard drive space for the server. Having a regular storage array connected to a server may not be best when trying to save just as much physical space as possible. Instead, the server is going to be constructed with slots available for extra disks.
It is advisable to obtain a server that's actually expandable for I/O. Automatically, most systems will only support two disks. That generally means one will be considered a mirror of the other, which leads to much less space available with no network link with a SAN or NAS.
It will be more expensive to obtain a rack server than to buy the equivalent tower based server. The complexity from the electronics and also the hardware is greater when everything needs to be compressed into a smaller package. Items like server cooling become a much more difficult since space is constrained. Simultaneously, these systems continue to be anticipated to generate the equivalent amount of computing power and speed even though the space available is less.
Because of all of that, the price will probably be higher for rackmount servers. However, the additional pricing is usually mitigated because they consume less space in the data center, where physical space is at a premium. Even with the financial savings from saving space, businesses need to be prepared to pay higher costs for rackmountable equipment.
The rack server is not a suitable option for those choosing their first server unless it will exceed the amount of physical space available. Having a tower, it's possible to add a lot of hard disk drives as well as peripherals for any much lower cost. The tower is a great option for those people who are centralizing their data servers with the remainder of the office in one position, that is common for a business that's just starting. Obviously, it is a good choice wherever physical space availability is not a problem.
The rackmountable equipment is a lot more right for a growing company that is going to need more and more servers because it continues to expand. The rack devices are also a fantastic way to define with increased precision how each square inch of space will probably be used in a data center. With a tower inside a data center, much space will be wasted.
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