HP Cluster Platform Hardware Kits v2010 Manuale utente

HP 36-Port InfiniBand Switch Cable

Management Kit Installation Guide

HP Part Number: 574412-doc

Published: May 2009

The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express

warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP

shall not be liable for technical or editorial errors or omissions contained herein.

InfiniBand™ is a trademark of the InfiniBand® Trade Association.

Voltaire is a registered trademark of Voltaire, Incorporated.

Table of Contents

1 Preparing for Installation................................................................................................5

1.1 Audience...........................................................................................................................................5

1.2 Documentation Resources.................................................................................................................5

1.3 Kit Description..................................................................................................................................5

1.4 Kit Contents.......................................................................................................................................5

1.5 Required Resources...........................................................................................................................6

1.6 Prerequisites......................................................................................................................................6

2 Installing the Cable Management Bracket...................................................................7

2.1 Installing the Cable Management Bracket........................................................................................7

2.2 Installing the Releasable Cable Ties to Secure the InfiniBand Cables..............................................7

3 Removing InfiniBand Cables and Switches..................................................................9

3.1 Removing a Damaged Cable From the Cable Management Bracket................................................9

3.2 InfiniBand Switch Removal.............................................................................................................10

Table of Contents 3

1 Preparing for Installation

1.1 Audience

This guide is intended for HP service representatives and other persons trained to install hardware

options in the HP Rack 10000 Series. Such persons are expected to understand the hazards of

working in this environment and to take suitable precautions to minimize danger to themselves

and others.

1.2 Documentation Resources

You can download the documentation for components referenced in this installation guide from

the following locations:

• HP Rack 10000 Series:

http://h18004.www1.hp.com/products/servers/proliantstorage/racks/10000series/

documentation.html

• HP Cluster Platform:

http://docs.hp.com/en/highperfcomp.html

1.3 Kit Description

The HP 36-port InfiniBand switch cable management kit described in this guide is designed to

align and support the InfiniBand cables that are cabled into and lead from a Voltaire 4036

InfiniBand switch. For example, the InfiniBand cables that run from a Voltaire 4036 InfiniBand

switch that is mounted in an HP Rack 10000 Series to another InfiniBand switch or server nodes.

The kit provides strain relief for the cables connected to the individual InfiniBand switch ports

and ensures a good connection. It also ensures the correct bend radius for the cable and provides

channels for cable routing and cable management.

One cable management kit is required for each 36-port InfiniBand switch.

Note:

The HP 36-Port InfiniBand Cable Management Kit is used in HP Cluster Platform Express (CPE)

configurations; however, it might be adaptable for other HP cable management applications

(consult your hardware installation documentation).

1.4 Kit Contents

Verify that the cable management bracket kit contains the following components:

• Packaging and documentation.

• The cable management bracket shown in Figure 1-1.

Figure 1-1 Bracket Hardware

1.1 Audience 5

• 18 releasable cable ties shown in Figure 1-2.

Figure 1-2 Releasable Cable Tie

• The fasteners specified in Table 1-1.

Table 1-1 Fasteners

DescriptionTorqueFormatSizeQuantity

Cage nut for M6 screw.N/ASquare nutM6 cage nuts2

Machine screw. For use with M6 cage nut.25-30 in/lbPosidriveM6 x 16 mm

pan head screws

To prevent screws from becoming loose because of vibration, HP recommends that you use

an adjustable torque drive, set to the torque specifications given in Table 1-1. Contact your

HP sales representative if any parts are missing.

1.5 Required Resources

To install the HP cable management kit, you require the following resources:

• Tools:

— Screwdriver, #2 (medium) Phillips

— Cage-nut insertion tool (shipped with the rack) or a flat-headed screwdriver

— Marker pen or masking tape

— Diagonal cutting pliers

• Resources: Cables of the type used by the InfiniBand switch.

1.6 Prerequisites

Before you begin to mount the bracket:

• Follow the cable-handling precautions for InfiniBand cables. For more information, see the

HP Cluster Platform InfiniBand Interconnect Installation and User's Guide at:

http://www.docs.hp.com/en/highperfcomp.html

• Obtain the set of cabling tables required for your solution (if applicable).

• Read the hardware installation guide for the InfiniBand switch you are installing.

6 Preparing for Installation

2 Installing the Cable Management Bracket

Figure 2-1 shows the correct orientation of the cable management bracket that you must install

before connecting the cables to the InfiniBand switch. The bracket provides strain relief for the

InfiniBand ports, and maintains the correct minimum cable bend radius.

Note:

One cable management kit is required for each InfiniBand switch.

2.1 Installing the Cable Management Bracket

To install the cable management bracket, follow these steps:

1. Align the cable management bracket (callout 2 in Figure 2-1) in the same “U” location as the

InfiniBand switch.

Note:

The location of the cable management bracket depends on the rack position occupied by the

InfiniBand switch.

2. Using the top hole in the same “U” location as the InfiniBand switch, fasten the cable

management bracket (callout 2 in Figure 2-1) to the rear rack columns (callout 1 in Figure 2-1)

by using two M6 pan-head screws (callout 3 in Figure 2-1) and tighten them to the specified

torque (see Table 1-1).

Figure 2-1 Mounting the Cable Management Bracket

2.2 Installing the Releasable Cable Ties to Secure the InfiniBand Cables

To install the InfiniBand cables and secure them with the releasable cable ties, follow these steps:

Note:

For instructions on how to install cables in the InfiniBand switch or remove cables from the

InfiniBand switch, read the installation guide for the InfiniBand switch type that you installed.

1. Looking in from the rear of the rack, install one InfiniBand cable in the top left port and the

other cable in the bottom left port of the InfiniBand switch (see Figure 2-2).

2. Secure two of the InfiniBand cables at a time (callout 3 in Figure 2-2) to the cable management

bracket by sliding the releasable cable tie down through the second slot from the left on the

2.1 Installing the Cable Management Bracket 7

cable management bracket, go around the bottom cable, and then back up through the first

slot in the cable management bracket.

3. Put the releasable cable tie end through the buckle and secure the two InfiniBand cables

firmly.

Caution:

Only hand-tighten the releasable cable tie to prevent damage to the InfiniBand cables.

4. Leave approximately 3/8 inch to 1/2 inch coming out of the releasable cable tie buckle and

clip the excess. Use one of the clipped-off pieces of cable tie as a tightness gauge to ensure

that the InfiniBand cable moves freely, but is securely fastened in the releasable cable tie

loop.

5. Repeat steps 1 through 4 to install and secure the remaining InfiniBand cables to the cable

management bracket. Be sure to use the appropriate slots for each releasable cable tie.

6. Route the InfiniBand cables to the side of the rack and secure them either upward or

downward in the cable management plate. Be sure not to exceed the 4-inch minimum bend

radius for each InfiniBand cable as you route them in the rack.

Figure 2-2 Installing the Releasable Cable Ties

The following list describes the callouts shown in Figure 2-2:

1. Left rear rack column

2. Cable management bracket

3. Two InfiniBand cables secured with one releasable cable tie

4. InfiniBand switch

Caution:

The releasable cable tie should only be tightened by hand. Do not use a cable tie installation tool

and do not over tighten the releasable cable tie or it might damage the InfiniBand cable.

8 Installing the Cable Management Bracket

3 Removing InfiniBand Cables and Switches

This chapter describes the procedure to remove a damaged InfiniBand cable or InfiniBand switch

for repair.

The removal procedure provided in Section 3.1 will include references to Figure 3-1.

Figure 3-1 Supported InfiniBand Cables

The following list describes callouts in Figure 3-1:

1. InfiniBand cables secured with the releasable cable tie

2. Release tab

3. Releasable cable tie tail

4. Releasable cable tie

5. Releasable cable tie slot

6. Cable management bracket

3.1 Removing a Damaged Cable From the Cable Management Bracket

To remove a damaged cable, follow these steps:

1. Bring the InfiniBand switch to an appropriate state for service as described in the switch

installation and user guide.

2. To release the InfiniBand cables (callout 1 in Figure 3-1) from the releasable cable tie (callout

4 in Figure 3-1), use your finger or a small flat-headed screw driver to release the cable tie

tail (callout 3 in Figure 3-1) by pressing the release tab (callout 2 in Figure 3-1). This

disengages the locking mechanism and allows the cable tie tail to be withdrawn from the

buckle.

Note:

The release tab is very small and might be difficult to reach with your finger. Use a small

flat-headed screwdriver to press the release tab which releases the cable tie tail. Also, because

there are several cables, removal of an InfiniBand cable in the middle portion of the switch

might be difficult without the use of needle nose pliers and a small flat-headed screwdriver.

Be very careful not to damage other InfiniBand cables while using pliers or a screwdriver.

3. Remove the InfiniBand cable from the switch. To remove the InfiniBand cable, pull the

release tab on the QSFP connector while using your other hand to remove the connector

from the switch.

For information on how to remove an InfiniBand cable from the InfiniBand switch, see the

installation guide for the type of InfiniBand switch you are installing.

3.1 Removing a Damaged Cable From the Cable Management Bracket 9

3.2 InfiniBand Switch Removal

To remove an InfiniBand switch, follow these steps:

1. Bring the InfiniBand switch to an appropriate state for service as described in the user guide

for the switch.

2. Remove all of the InfiniBand cables from the InfiniBand switch, but leave them secured in

the cable management bracket.

3. Remove the cable management bracket from the mounting rails.

4. Leave the cables secured in the cable management bracket and carefully set the bracket

aside.

Caution:

Do not bend the InfiniBand cables more than the 4-inch minimum bend radius.

10 Removing InfiniBand Cables and Switches

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