Server Rack Cabinets Explained: A Guide for IT Beginners

In the world of IT infrastructure, server rack cabinets play a crucial role. They help organize, secure and optimize hardware components in an IT systems setup. Whether in data centers, corporate IT rooms, or small businesses, server rack cabinets enable efficient management of networking equipment, servers and storage devices.
Let’s explore the essentials of server rack cabinets and why they are indispensable in IT setups in business.


What are Server Rack Cabinets

A server rack cabinet is an enclosure to house IT related equipments like servers, switches, routers and storage devices. They are generally made of Steel or Aluminum. These cabinets offer a structured space to mount IT hardware. All the while ensuring proper airflow, equipment safety and easy cable management.


Why use server rack cabinets

  1. Hardware Organization & Space Optimization
    Well-structured cabinets help organize the IT hardware in your office. They enable better management of your IT devices, and efficient use of the IT room space. Without rack cabinets, it can get messy with all the devices stacked up.
  2. Improved Cooling & Airflow
    Proper cooling and airflow in the room prevents overheating of IT hardware. Optimal room temperature maintains device performance, and adds longevity. Good airflow prevents dust deposition on the devices. 
  3. Enhanced Security
    Lockable server rack cabinets protect against unauthorized access and device tampering. Moreover, rack cabinets prevent potential loose contacts in devices due to movements during usual cleaning.
  4.  Cable Management
    Rack cabinets enable integrated cable management, maintaining clean IT setups. As devices add up, the number of cables used also goes up. The cables, if intertwined, can make tracing and troubleshooting difficult later. Cable manager, on the sides of the cabinets, helps arrange cables in bunches.
  5. Scalability & Flexibility
    Modular server rack systems help businesses expand IT infrastructure incrementally as their needs grow. These setups also accommodate newer technologies like Artificial Intelligence (AI), Internet of Things (IoT).

Types of Server Rack Cabinets

1. Open Frame Racks

  • These have an open structure without doors or side panels.
  • Provide excellent airflow and easy access for maintenance.
  • Ideal for environments where physical security is not a concern.

2. Enclosed Server Cabinets

  • They have front and rear doors, side panels and locking mechanisms.
  • Offer extra security and controlled airflow.
  • Suitable for data centers and enterprise environments.

3. Wall-Mount Racks

  • These are small, compact, lightweight racks designed for mounting on walls.
  • Provide efficient cable management and accessibility.
  • Ideal for small offices or telecom rooms with limited space.

Choosing the Right Server Rack Cabinet

Choosing the right server rack cabinet depends on the specific needs of a business. Think about your current, and future IT hardware requirements. Consider the following factors-

  • Size & Capacity
    • Following a standard design, server rack cabinets come in different dimensions of width and depth, both measured in mm (millimeters) and height measured in IU (international unit). 1U equals 1.75 inches. Examples- 42U 600*800 cabinets, 70U 800*1000 cabinets. While U denotes height, other two dimensions indicate width and depth (length).
    • Typically, 1U is the standard size for a patch panel, cable manager or switch. 12U floor-standing server rack cabinets are popular in setting up small data centers.
    • It’s a common mistake people make buying 600*800 cabinets for Rack servers. For rack servers, use 1000mm depth cabinets  instead of 800mm. Because these servers fit in only in 1000 cm depth cabinets. Plus, there won’t be difficulty in closing the cabinet door. 
  • Cooling Mechanisms
    Look for rack cabinets with perforated doors, or built-in cooling systems. Many have cooling from below or fans at the top, while some others from the sides. Two-rack configurations have cooling from the middle.
  • Security Features
    Many rack cabinets have security features like lockable doors and access controls. It’s better to go for these if your server room doesn’t have access control. Some cabinets come with CCTV to record footage for monitoring and surveillance.
  • Cable Management
    Ensure efficient routing for power and data cables. It is a good practice to route data cables through the sides, and power cables from back.
  • Mobility & Accessibility
    Consider racks with casters for easy movement during maintenance. It can be difficult to move those heavy racks with all the devices inside. A nice pair of caster wheels can help here. Moving and locking racks in correct places becomes easy then.

Setting up IT room with Server Rack Cabinets 

When planning to set up your server room or space for IT equipments, consider the following:

  • Start by thinking about the number and types of devices you will store in your IT room.
    • Usually, patch panels take 1U space/panel, cable manager-1U, switch-1 or 2 U, PABX-1 or 2 U, Gateway-1U, NVR-1 or 2 U, Server-1 or 2 U, SAN Storage-1, 2 or 4 U, NAS Storage-1, 2 or 4 U, UPS-2 or more U, Battery pack-2 or more U. 
    • When you get a big picture of all the devices you need in the room, calculate the total U house the devices. Accordingly, select your cabinet dimensions.
    • At the same time, don’t go for cabinets that exactly meet your total U calculated. Leave 10-20% U vacant for future expansion. For instance, if your calculated total U is 10U, buy a 15U cabinet instead of 10U.
    • If your toal U is smaller, say 5 or 7 U, a wall-mounted rack would be best. In case of heavier racks like 15U, 22 U or above, consider floor-standing rack with castor wheels. 
  • Ensure air conditioning in the room. Industrial AC units rather than split AC. Place an inward duct near the Rack cabinet in case you have centralized cooling. 
  • Allow enough space to access the rack from front, sides and back for future troubleshooting.
  • Have cable managers and side access panels for ease of repair. 
  • Allocate enough cage nuts to hold the devices in place. In case of narrower devices, that can’t be mounted, have shelves.
  • Consider the PDU-power distribution unit as per number of devices and select plug points according to device power plug type.
  • Raised floor with tiles helps bring in the cables from below unto the rack cabinet. 
  • Periodic dusting allows more airflow, that in turn, improves device longevity and performance. 

Final Thoughts

Server rack cabinets are the backbone of IT infrastructure. They play a critical role in maintaining an organized, secure and efficient IT environment. Whether in data centers or small offices, they help optimize space, improve equipment cooling and secure sensitive hardware. 

With options like open-frame racks, enclosed cabinets and wall-mount racks, businesses can select the right fit based on their size, security and scalability needs. 

Careful attention to rack dimensions, cooling, security features and cable management ensures a reliable and future-ready IT infrastructure. Investing in the right server rack cabinet is key to smooth operations and long-term system health.


Looking to upgrade your IT setup? Explore your options today and build a smart IT environment!

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