HP LP 2000r User Manual

planning your

rack system for

LP 2000r

hp netserver high

density rack solutions

overview

• up to 21 servers per 2m rack

• tool-less installation

• multiple solutions for both 2-post and 4-post racks

HP Netserver High Density Rack Solutions Overview (LP 2000r)

Executive Summary

This white paper is designed to provide information for individuals charged with deploying multiple HP Netserver LP 2000r units into racks and cabinets. The incredible density available when using the HP Netservers LP 2000r - up to 21 servers in a single rack - allows for the ultimate in computing power but presents new challenges to those actually assigned to assemble the system. The purpose of this white paper is to help you plan and install a reliable computing system using the HP Netserver LP 2000r.

It provides information about accessories that complete a rack solution (pages 12 - 18), installation options for your HP Netserver LP 2000r (pages 19 - 24) and cable management suggestion to insure a reliable system (pages 25 - 27). In addition, it provides information regarding how to calculate power consumption and thermal dissipation based on your hardware configuration so that you can assess and design your power and cooling infrastructures appropriately (see pages 5 - 9).

The paper is intended for Information Technology (IT) managers, IT staff, and consultants who plan and install Hewlett-Packard PC-based server systems, especially where multiple servers are to be mounted in EIA standard racks.

HP Netserver High Density Rack Solutions Overview (LP 2000r)

Additional resources about the HP Netserver LP 2000r and the HP System/E Racks

Publications

HP Netserver LP 2000r User Guide (HP publication P1824-90009)

HP Rack Systems/E User’s Manual (HP publication 5967-6409)

Websites

HP Netserver website: http://netserver.hp.com

HP Netserver Configuration Guide: http://netserv e r. h p . c o m / n e t s e rv e r / t o o l s / r a c k _ a s s t . a s p

HP Netserver Configuration Guide: http://netserver.hp.com/netserver/tools/

HP Rack Solutions website: http://www.hp.com/racksolutions/index.html

HP Rack Accessories website: http://www.hp.com/racksolutions/menu_products.html

HP Rack System/E User Manual: http://www.hp.com/racksolutions/I_installguides.html

HP Netserver High Density Rack Solutions Overview (LP 2000r)

Reader Assumptions

This white paper is for the person who installs, administers, and troubleshoots PC-based networked servers. Hewlett-Packard Company assumes that you are qualified in the servicing of computer equipment and trained in recognizing the risks posed by products with hazardous energy levels.

We also assume that you are familiar with personal computing terminology, PC specifications, networking standards, and software applications.

iii

HP Netserver High Density Rack Solutions Overview (LP 2000r)

Table of Contents

Section Page

Executive Summary....................................................................................................................................i

List of Additional Resources .....................................................................................................................ii

Reader Assumptions.................................................................................................................................iii

Table of Contents......................................................................................................................................iv

Notices........................................................................................................................................................1

Safety and Regulatory Information...........................................................................................................2

Glossary ......................................................................................................................................................3

Planning Your Racked System...................................................................................................................5

The HP Rack System/E............................................................................................................................10

HP Rack Accessories................................................................................................................................12

Installation................................................................................................................................................19

Cable Management...................................................................................................................................25

Conclusion................................................................................................................................................28

HP Netserver High Density Rack Solutions Overview (LP 2000r)

Notices

The information contained in this document is subject to change without notice.

Hewlett-Packard makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose.

Hewlett-Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.

This document contains proprietary information that is protected by copyright. All rights are reserved. No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of Hewlett-Packard Company.

HP Netserver High Density Rack Solutions Overview (LP 2000r)

Safety and Regulatory Information

For your protection, Hewlett-Packard products are tested for conformance to various national and international regulations and standards. The scope of this regulatory testing includes electrical and mechanical safety, electromagnetic emissions, immunity, ESD, and hazardous materials.

Where required, certifications are obtained from third party test agencies. Certification marks, when required, appear on the product label. In addition, various regulatory bodies require some information under the headings below.

These products and related documentation must be reviewed for familiarization with safety markings and instructions before operation.

WARNING The WARNING sign denotes a hazard. It calls attention to a procedure, practice, or

situation which, if not done correctly or adhered to, could result in injury. Do not proceed beyond a WARNING sign until the indicated conditions are fully understood and met.

CAUTION The CAUTION sign denotes a hazard. It calls attention to an operating procedure, practice,

or situation which, if not done correctly or adhered to, could damage or destroy part or the entire product. Do not proceed beyond a CAUTION sign until the indicated conditions are fully understood and met.

Safety Warnings

The following warnings and cautions are applicable to the System/E rack. Please observe all safety precautions and warnings.

This product has not been evaluated for connection to an IT power system (an AC distribution system having no direct connection to earth (ground) according to EN60950.

Grounding

WARNING The HP System/E Racks are safety class I product and has a protective earthing

Leakage Current

WARNING Due to types of products that can be installed in the System/E rack, there is a risk of high

Power Limitations

CAUTION To reduce the risk of overload, do not load any single Power Distribution Unit (PDU) or

(grounding) terminal. There must be an uninterruptible safety earth ground from the main power source to the product’s input wiring terminals, power cord, or supplied cord set. Whenever it is likely that the protection has been impaired, disconnect the power cord until the ground has been restored.

leakage current (3.5 mA). Reliable ground circuit continuity is vital for safe operation of this product. To reduce the risk of electric shock, earth (ground) connection is essential before connecting the power supply. Never operate this cabinet with the ground conductor disconnected.

IEC-320C19 receptacle with more than a maximum of 16 A. In addition, do not load a single NEMA 5-15 or IEC-320 C13 receptacle with more than a maximum of 10 A.

Cabinet Stability

CAUTION To reduce the risk of cabinet instability, deploy the anti-tip feet before installing or

Accessories

CAUTION This product is designed for use with specific electrical accessories. The use of any other

extending any devices. Extend only one device at a time. Do not stand or sit on any extended device. Qualified service personnel should do all non-operator servicing.

accessory is not recommended or supported.

HP Netserver High Density Rack Solutions Overview (LP 2000r)

Glossary

This glossary provides entry-level explanations of common words and phrases used when mounting multiple servers in racks. Detailed HP product information is available in numerous documents available from HewlettPackard, such as technical data sheets and configuration guides. You can find them on our website at h t t p : / / w w w. h p . c o m / r a c k s o l u t i o n s / m e n u _ l i t . h t m l.

1U – One EIA rack unit or 44.45 mm (1.75 inches) of vertical rack space. The

height of devices, when mounted in racks, are often expressed in multiples of "units", for example, a 2U device requires two times 44.45 mm (1.75 inches) or a total of 88.9 mm (3.5 inches) of vertical space in a rack. The actual device will in reality be of slightly less height to eliminate mechanical interference with adjacent devices.

Cable Management – Refers to a method of organizing and routing cables

(power and data) in the rear of the rack. Effective cable management means to secure and bundle cables with the capability to efficiently route and channel the cables in an organized fashion. HP offers a Rack Cable Management Kit (J1481A) to provide a solution for the high-density rack environments associated with the HP Netserver LP 2000r.

Console (sometimes referred to as a console system or KVM system) – Consists

of the video monitor, keyboard and mouse connected directly, or via a console switch, to the rackmounted server for system administration purposes. Remote management technologies enable the console and server to be physically separated.

Console Switch – A device that allows a user to operate multiple servers with

a single keyboard, monitor, and mouse.

KVM – Abbreviation for Keyboard/Video (Monitor)/Mouse as used in "KVM cable"

or "KVM switch." A console switch (above) is often referred to as a KVM switch.

PDU or Power Distribution Unit – Generally refers to a "power strip" with built-in

power protection and mounted within the rack to furnish AC power to a group of rackmounted servers.

Rackmount Flat Panel Display – A system by which a flat panel monitor,

keyboard, and pointing device can be rack mounted to be used as system console but only requiring 2U of “vertical rack space” instead of 13U as is common with traditional monitor and keyboard combinations.

HP Netserver High Density Rack Solutions Overview (LP 2000r)

Retractable Keyboard Kit - A product, which allows for mounting a full-size

keyboard and mouse in a rack, occupying only 2U of vertical space and retracting into the rack when not used.

Slides - A sliding rackmount solution comes standard with the HP Netserver LP

2000r. Slides enable in-rack serviceability of the server from the front of the rack. Also included is a cable management arm, which allows the cabling to travel effortlessly as the server extends from and retracts into the rack, similar to a drawer in a filing cabinet.

UPS - Uninterruptible Power Supply. A device that provides battery power for a

server should the local AC power source fail. By providing this temporary power, data corruption can be avoided when a power failure occurs.

HP Netserver High Density Rack Solutions Overview (LP 2000r)

Planning your racked system

After you've decided what computer and networking equipment and racks you need, you're faced with the daunting task of physically locating the systems somewhere.

There are several conditions that must be met to assure that your system will work reliably and without interruptions. First, you must plan for the physical space the equipment will occupy. Second, you must ensure that the floor where the equipment will be located is strong enough to dependably support the weight. Electronic equipment, although small in size, can be physically heavy—especially Uninterruptible Power Supplies (UPS) that often use dense batteries.

Third, the system planner must calculate the power requirements and determine the number of Power Distribution Units (PDU) and UPSs needed, as well as insuring that adequate circuitry is available in the facility.

Lastly, you must insure that you can provide cooling for the equipment. Thermal requirements become a concern when mounting a mass of electronic equipment in a small physical space and a conscientious planner will deal with thermal buildup in the preparation phase before the system is delivered and ready for mounting in the rack.

Many of these calculations can easily be made with the special HP Netserver Rack Configuration software available from HP for free at http://netserver.hp.com/netserver/tools/rack_asst.asp or by following these basic steps:

1 List all components. 2 Configure those components into racks to determine the number and

size required.

Use the HP Netserver Configuration Guide, available at: http://http://netserver.hp.com/netserver/tools/, for the height of the equipment. With this aid, calculate how many devices can be installed into any one rack and its preliminary layout.

3 Calculate the power requirements.

The electrical power required for a racked system must be calculated to:

1) Plan for an adequate facility supply for either 100-120V or 200-240V

2) Determine the number of Power Distribution Units needed

3) Determine the number of Uninterruptible Power Supplies required

Determine power requirements for the servers.

As mentioned above, the amount of servers that can be installed in one rack depends on a number of parameters: Physical space in the rack, electrical (power) requirements and thermal limitations.

The worksheet at the end of this section allows you to calculate the actual power consumption for your servers, including differences due to the number of processors, HDDs, and communication cards. Knowing the actual power consumption lets you design a system, which precisely meets your current—and future— requirements.

NOTE Always plan your infrastructure for appropriate expandability and future growth.

HP Netserver High Density Rack Solutions Overview (LP 2000r)

Calculate total input current requirements. Input current requirements

Once you know the input power needed to operate the servers and other devices installed in the rack, you can calculate the input current that is required for the rack by using this formula:

I n p u t / C u rrent (A) =

Using this basic formula, you can evaluate whether your PDU, UPS and/or local AC power circuit can provide the amount of current the equipment connected to it needs.

For example, if you are connecting four servers to a 16 A PDU, you can use the tables above and determine the total input power requirements for each server. In this example let’s assume we have calculated these to be:

Server Total Input Power (W)

HP Netserver LP 2000r #1 176 HP Netserver LP 2000r #2 177 HP Netserver LP 2000r #3 180 HP Netserver LP 2000r #4 180

The total input power requirements for these four servers come to 713 W. By knowing that we are operating at a line power of 100 VAC and using the formula above we can calculate that the four servers will require an input current of 7.13 A—well below the capacity of the 16 A rated PDU.

Circuit breakers

The HP Netserver LP 2000r power supply has been designed for low AC inrush current to reduce the possibility of tripping circuit breakers, typically located at a distribution panel.

Tripping of circuit breakers in the distribution panel may result from use of circuit breakers that are not adequately rated for inrush current found in most electronic devices. Replacing the circuit breaker with a suitable type is often the best solution.

Input Power (W) AC Voltage (V)

The largest inrush current occurs when AC is first applied to the equipment in the rack. Often this inrush current is independent of the “on” or “off” state of the individual devices. However, you can usually reduce the total inrush current by applying power to the rack with the equipment in the “off” stage.

Power up sequence

Follow these instructions to minimize inrush currents and to minimize circuit breakers from tripping:

1. Power on peripherals one at a time; beginning with the tape back-up unit, followed by the mass-storage units, keyboard, video monitor, and mouse switch, if any.

2. If your system includes an HP Console Switch, it must be powered on before the HP Netserver LP 2000r.

3. Last, power on each HP Netserver LP 2000r and wait for the fan in each server to spin up before powering on the next one. If the HP Netserver LP 2000r doesn’t detect all the required components, it will not complete the boot process and will report an error.

Power down sequence

There is no specific order to power down the equipment in a rack; however, there is an HP recommendation that it be done in the following sequence:

1. Ensure that the network users are properly warned of the power down.

2. Shut down the Network Operating System.

3. Power down the peripherals.

4. Power down the Netservers.

+ 23 hidden pages