22 Feb

Eia Rack

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Server Racks: Server Racks How and Why To Use

Eia Rack

5 things to keep in mind when buying a server rack

Author: Lauren Nowenstein

Server rack enclosures are integral to the success of your organization because they provide the platform that houses the mission-critical equipment business depends on it. Choice of server rack will help effectively power, cool, and protect his team maintain the smooth running of your business reduce potential downtime and managing and organizing your data center more efficient. Here are five things to consider:

1. Select an appropriate size Rack
Choose a server rack with enough interior space to house its current team and ensure Have adequate space for planned future expansion, as well as purchases of unforeseen equipment. Rackmount computer measured by the Electronic Industries Alliance (EIA) standard rack unit "or rack" U ". A" Rack Unit " is equal to 1.75 "tall. Note that the space for accessories, such as devices for environmental monitoring, remote power management devices, screens LCD rack-mount, and battery back-up may be necessary. For example, if you need 20 servers 2U host you want to choose a rack with a height of 44U to accommodate accessories such as patch panel 1U, 2U UPS and a backup battery. A rack of interior height is measured from the highest point on either side in the chassis, internal depth is measured from the interior of both front and back doors, interior and the width is measured from a side panel to another. Make sure the rack outside dimensions are to be housed on the floor, the space allocated for it, check that you can move through all doors and ensure it complies with the placement of his license or safety standards. As a note, always use the techniques of the cargo bay, including placing heavy items at the bottom of the bay avoid becoming too heavy high rack, have a plan what you want for front and rear network (based on the amount you need to access equipment or remove) and someone in charge of the equipment is heavy and / or above the head height. (1)

2. Physical security starts here
Security is vital to the welfare the role and your business. Learn how your server rack fits into its overall strategy to safety is equally important. There are several steps you can take to improve safety offer this option. Secondly, the use of environmental monitoring proactively monitor your racks. Besides allowing administrators to control the amperage draw for the circuit, water leaks, temperature and other variables, and automatically send alerts via SMTP / SMS / SNMP when conditions exceed thresholds, environmental monitoring has several door sensors that support "normally open or normally closed conditions and can alert administrators when a cabinet door was open. (When a state change in relation to its threshold occurs, the device reports an "error" condition). In addition, devices that are work with the platform and the camera sensor pods pods to allow administrators to continually visually monitor racks and server rooms, and recording audio clips. If you are planning a new datacenter, you can also consider other physical security measures such as building data center the main road, limiting the window in the data center, and secure the provision of inputs and there. (2)

3. Customize your design with Rack work for you
Most manufacturers allow you to select many options for your server rack meets the specific needs of your environment. There are several areas to be able to choose options.

Shelving: Most manufacturers offer rack server platform options, including fixed and the server adjustable, with four points assembly, mobile keyboard with 2 mounting points, air, truck, or shelves and shelves encorbellement media. Select a server rack shelf with a depth of 6 inches below the depth of the network, for example, if you have a depth of 30-inch cabinet, choose a tray with a depth of 24 inches.

Upper and lateral: Home of the protection of the equipment panel material. Options include drilling ventilation slots, holes for the eyes of the cable management, assembly and fans. Side panels offer security and are often available several options: solid fixed, removable, solid, sound and ventilation (FLAP).

Mounting rails: Most carriers have two sets of mounting rails. However, groups of lanes can be classified according to depth and to facilitate the dock. Most manufacturers allow you to choose the rails Universal mounting (square holes fitted with cage nuts) or EIA standard rails (with holes harness 10/32). Universal rail support 19 "wide rack EIA and almost all the network equipment and server hardware. Standard EIA Rails support 19 "EIA rack width and network equipment manufacturers of computers and rack-mount server. What the rails are square or threaded holes, all mounting rails ANSI/EIA-310-D rule (1992). Most manufacturers recommend pregnant rails with holes square cage nuts, and now most of the models was to use the rack rails with square holes.

Feet: Available "feet" Options retractable anti-tip feet to stabilize in mid – senior laden racks, wheels are attached to the bottom of the cabinets server racks to support the maneuver, and the standard to be used if the wheels are made to ensure that support is maintained at the level once you have moved from one place to other.

4. Browse the latest energy technologies
Power Distribution Units (PDU) of the distribution of power for servers All the power strip. Rack mount power strips are specifically for servers and racks or mounted vertically behind the mount on the back of a closet. Power strips are divided into two categories: standard and intelligent. Standard power, while the strips have features that can provide valuable information such as replacing fuses and indicators of output sample should be administered in person and on the site. In contrast, energy smart strip power control Remote, which allows administrators to perform a cold reboot of servers and devices and troubleshoot problems from any location with internet connection, server and obtain reduction of vital functions back online quickly. Products not only provide remote control of intelligent assistant systems, they also enable administrators to great advances in power distribution as the 3-phase power. Three-Phase energy technology is not exclusive to the power of remote management of products, but many solutions can accommodate or incorporate. In comparison with single phase power, 3-phase circuit uses less energy, provides a more balanced diet charge, reducing the total number of PDUs needed to power equipment, and significantly increases available amperage into the server rack. For example, in a half rack ambient (4) 20-amp circuits are required for 64 amps of available power (assuming a maximum 80% load). In contrast, a 3-phase circuit can provide up to 51.6 amps per circuit, or over 82 amps of power available, while only requiring 2 circuits (assuming a maximum at 80% load). The cost savings of 3-Phase power is beneficial, especially since experts estimate that in the future, the cost of electricity could increase from current levels by 10 cent or less of the budget for 20-30 per cent (3). Other aspects to take into account the number of outlets to plug / receptacle needs and redundancy.

5. Know your cooling strategy
Understanding the role that the server racks in their entire data center cooling strategy. The type network you choose will depend on the cooling methods used in your environment. Baseline kW of heat generated per rack varies widely, depending on the type and density of equipment, and can be anywhere from 4 kW-12 kW per rack or more, with some experts estimating that the rise in high density environments and models for the future equipment will result in an output of 30-50 kW per rack. (4)

All perforated Racks: Choose a perforated rack for maximum air flow if the first method of cooling your data center or server will be ambient air cooling (fans, air blowers for assistance and / or Room Air Conditioning (CRAC) and a raised floor).

Fully sealed Racks: Select completely sealed rack if a liquid cooling, air conditioning or a rack used in your environment.

As an application server and the increased power density, coolant (modular, temperature-neutral High-density cooling solutions using the air / water heat exchangers to provide uniform and efficient cooling) are increasingly used. A of the main advantages of self-cooling liquid that is given little or no impact on the current HVAC system. Liquid cooling units are mounted on a rack at the base, in a rack "side car" with three cooling modules possible per equipment rack, and can provide a cooling capacity of 30kW.

Rack air conditioners are generally used in environments of data systems for CARC. However, if the equipment is outside of a controlled environment data, as in a warehouse or factory rack air conditioners are sometimes used. It is important to realize that air conditioners are designed for use in the grid and large industrial sites, which generate noise and condensation, and have the hot exhaust air in the room where the box. In a large room, the heat dissipates. In a small room or confined space like a closet, the hot air out of the network can cause overheating of the room. If AC is used in a small room, measures should be applied to exhaust hot air from the room. Air conditioning models differ in the amount of production cooling, they can make, to select one suits your needs.

Below are formulas to help calculate the heat load and select a rack air conditioner:
1. Add the power of each device and convert it to BTU (a manual of the overall list of their power). Also can determine the power with the following formula (watts = volts x amps). (5) Remember that 1kW = 1000 watts.

2. If a rack air conditioner will be used for 1 kilowatt consumed, which is generated 3412.14 BTU. Air conditioners are available for different levels of BTU.

Other rooms
Other ways to improve cooling include the use of cutting the panels to manage air flow efficiency, selecting a carrier with a high – cable channels for better management and improving air circulation, and elimination of unnecessary or obsolete equipment in the bay. Also, keep in mind the 3-phase power can increase the power available in the server rack, reducing the
total number of PDUs needed to power equipment and leaving more room for air circulation.

To More information on the media server, including tips on buying the network to its environment, an engineer with 42U in 1-800-638-2638. To build and click "online support, visit http://www.server-rack-online.com.

References
(1) "Rack Layout" http://www.hurgh.org/articles.php?article=rack_layout

(2) Scalet, Sarah (2005). "19 Ways to Build Physical Security into a Data Center." CSO Magazine. Http: / / Www.csoonline.com/read/110105/datacenter.html

(3) Kirk, Jeremy (2006). "Hot, very limited data for the years ahead." Infoworld. Http: / / www.infoworld.com/archives/emailPrint.jsp?R=printThis&A=/article/06/11/20/HNdatacenters_1.html

(4) Brill, K. (2005) "2005-2010 Trends in the heat density of Data Processing, Information Systems and Telecommunications Equipment." Uptime Institute.

(5) Miller, Sandra Kay (2006). "With portable AC cooling." Processor.
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42U offers turnkey solutions for data, including KVM over IP, intelligent power environmental monitoring, rack cooling, and rackmount solutions. Team 42U specializes in assessing needs, creating solutions and support to customers, ensure that professionals to maximize the use of technology to improve current business performance.

For About the author:

This article was written by Lauren Nowenstein, technical writer, with the assistance and contribution of Sales Team Solutions DirectNET Engineers.

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