Server rack
A server rack is a standardized metal structure for mounting server and network equipment, measured in units (U), used in data centers and server rooms.
Contents
What is a server rack
A server rack is a standardized metal structure (open frame or closed cabinet) for mounting server, network, telecommunication and other IT equipment. The height of the rack is measured in units (U), where 1U = 44.45 mm. Server racks are the main element of data center infrastructure, providing compact placement, convenient maintenance access and effective cooling.
Main characteristics of server racks
- Height — 42U (about 2 m) for data centers, 36U, 27U.
- Width — 19 inches standard.
- Depth — from 600 to 1200 mm.
- Load — from 500 to 1500 kg.
Server rack equipment
Vertical rails for mounting, horizontal shelves, power distribution units (PDU), cooling systems, cable organizers and locks.
Types of server racks
- Open racks — frames without walls and doors.
- Closed cabinets — with walls and doors for protection.
- Anti-seismic racks.
- Wall-mounted racks.
- Portable racks.
Installation and maintenance
Cold/hot corridor planning, grounding, cable marking, regular monitoring.
Frequently asked questions
What is 1U in a server rack?
1U (1 unit) is a standard height measurement equal to 44.45 mm. Servers can be 1U, 2U, 4U high. A 42U rack can hold 42 1U servers.
What are the standard server rack dimensions?
Width of 19 inches, height 42U (about 2 m), depth from 600 to 1200 mm. In data centers racks of 1000-1200 mm are most often used.
How is a server rack different from a server cabinet?
A rack is an open metal frame. A cabinet is a closed structure with doors and locks for additional protection.
How much equipment can fit in one server rack?
For example, a 42U rack can hold 42 1U servers or 21 2U servers. On average 15-20 servers fit considering cooling gaps.
How is cooling organized in a server rack?
Cold corridor / hot corridor principle. Temperature 18-27°C and humidity 40-60% are maintained in data centers.
What are the requirements for server racks at CII facilities?
Physical protection: locks, access control systems, video surveillance and door sensors. Grounding and fire safety compliance are also required.
How do I choose a server rack for a data center?
Consider equipment depth, load, cooling requirements, cable management, DCIM compatibility and physical security.
Other terms in «Infrastructure»
Was this information helpful?
Build reliable IT infrastructure
Build a modern, fault-tolerant IT infrastructure. Design, equipment supply, installation and maintenance turnkey.