HP Cluster Platform Hardware Kits v2010 User manual

HP BladeSystem c-Class Enclosure Cable
Management Bracket Installation Guide
HP Part Number: 436670-doc
Published: September 2008

©Copyright 2008 Hewlett-Packard Development Company, L.P.
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.
Printed in the U.S.A.

Table of Contents
1 Preparing for Installation................................................................................................7
1.1 Audience...........................................................................................................................................7
1.2 Documentation Resources.................................................................................................................7
1.3 Kit Description..................................................................................................................................7
1.4 Kit Contents.......................................................................................................................................7
1.5 Required Resources...........................................................................................................................8
1.6 Prerequisites......................................................................................................................................9
2 Aligning the Bracket.....................................................................................................11
3 Installing the Cable Management Bracket................................................................13
3.1 Installing the Cable Management Bracket......................................................................................13
3.2 Installing the Releasable Cable Ties for the InfiniBand Cables.......................................................13
4 Removing InfiniBand Cables and Switches...............................................................17
4.1 Removing a Damaged Cable From the c-Class Cable Management Bracket.................................17
4.2 InfiniBand Switch Removal.............................................................................................................17
Table of Contents 3

List of Figures
1-1 Bracket Hardware...........................................................................................................................8
2-1 Bracket Orientation.......................................................................................................................11
2-2 Bracket Mounting Locations.........................................................................................................12
3-1 A Cable Management Bracket Holding 16 InfiniBand Uplink Cables..........................................14
3-2 A Cable Management Bracket Holding 8 InfiniBand Uplink Cables...........................................15
3-3 InfiniBand Cable Secured with a Releasable Cable Tie.................................................................16
3-4 Gauging the Tightness of the Releasable Cable Tie Loop.............................................................16
4-1 Cable Tie Release Tab....................................................................................................................17
4 List of Figures

List of Tables
1-1 Fasteners (Supplied with Cabinet Mounting Hardware)...............................................................8
2-1 Bracket Mount Locations...............................................................................................................12
5

6

1 Preparing for Installation
1.1 Audience
This guide is intended for HP service representatives and other persons trained to install hardware
options in HP 10000 series racks. 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 10000 Series Rack (Documentation option):
http://h18004.www1.hp.com/products/servers/proliantstorage/racks
• HP Cluster Platform:
http://docs.hp.com/en/highperfcomp.html
1.3 Kit Description
The c-Class enclosure cable management bracket described in this manual is designed to align
and support the InfiniBand cables that lead from HP BladeSystem c-Class InfiniBand switches.
For example, the InfiniBand cables that run from an HP BLc 4X DDR InfiniBand switch mounted
in the rear of the HP BladeSystem c-Class enclosure to another switch, or a similar interconnect
device. The kit provides strain relief for the cables connected to the individual InfiniBand
interconnect 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 HP BladeSystem
c-Class enclosure cable management bracket is required for each bay of system interconnect
device.
NOTE: The c-Class server blade enclosure cable management bracket is designed to support
24 AWG (0.41 inch) diameter, 26 AWG (0.37 inch) diameter, and 28 AWG (0.33 inch) diameter
QSFP InfiniBand cables. Consult the documentation supplied with your cluster before installing
the brackets and routing the cables.
1.4 Kit Contents
Verify that the cable management bracket kit contains the following components:
• Packaging and documentation.
• The bracket hardware shown in Figure 1-1.
1.1 Audience 7

Figure 1-1 Bracket Hardware
1
2
5
6
3
7
4
The following list describes the callouts in Figure 1-1:
1. HP BladeSystem c-Class Enclosure Cable Management Bracket
2. Completed releasable cable tie assembly
3. First hole (port 1) of the inside row of holes used for the InfiniBand switch with 16
external uplink ports (489183-B21)
4. Push-button mount
5. Rail-mount hook (one on each end of the bracket)
6. Mounting hole to fasten the bracket to the rack's rear rail (one on each end of the bracket)
7. Outside row of holes used for the InfiniBand switch with 8 external uplink ports
(410398-B21)
• The fasteners that are specified in Table 1-1.
Table 1-1 Fasteners (Supplied with Cabinet Mounting Hardware)
DescriptionTorqueFormatSizeQty.
Cage nut for M6 screw.N/ASquare nutM6 cage nuts2
Machine screw. For use with M6 cage nut.25-30 in/lb#2 Cross recessM6 x 0.625 inch
pan head screws
2
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 the table above. Contact
your HP sales representative if any parts are missing.
• 16 push-button mounts (see callout 4 in Figure 1-1)
• 16 releasable cable ties (see callout 2 in Figure 1-1)
Note:
This cable management bracket might also be adaptable for other cable management solutions
(consult your hardware installation documentation).
1.5 Required Resources
To install the HP c-Class enclosure cable management bracket, you require the following resources:
8 Preparing for Installation

• Tools:
— Screwdriver, #2 (medium) Phillips.
— Cage-nut insertion tool (shipped with the rack) or a flat-headed screwdriver.
— Marker pen or masking tape.
• Resources: Cables of the type used by the HP BladeSystem c-Class InfiniBand switch.
1.6 Prerequisites
Before you begin to mount the bracket:
•Follow the usual cable-handling precautions for InfiniBand cables, see the HP Cluster Platform
InfiniBand Interconnect Installation and User's Guide.
•Ensure you know how to plug in the InfiniBand cables, as described in the HP Cluster Platform
InfiniBand Interconnect Installation and User's Guide.
• Read the rack installation instructions for the c-Class enclosure.
• Obtain the set of cabling tables required for your HP Cluster Platform solution.
Important:
Do not secure the enclosure into the rack before you begin the bracket installation. You must be
able to access the rear (inward) face of the rack columns.
1.6 Prerequisites 9

10

2 Aligning the Bracket
Figure 2-1 shows the correct orientation of the cable management bracket which you must install
before connecting the cables to the InfiniBand switch module. During the cabling procedure, the
bracket provides strain relief for the InfiniBand ports, and maintains the correct minimum cable
bend radius.
Figure 2-1 Bracket Orientation
2
1
The following list describes the callouts shown in Figure 2-1:
1. Mounting hook installed in one of the mounting holes in the rack's rear left column
2. Cable management bracket
Callout 1 shows the bracket's mounting hook installed in one of the square holes in the left rear
rack column. The actual mounting locations for a bracket are relevant to the location of the c-Class
enclosure in the rack, and must align with the InfiniBand switch installed in the c-Class enclosure.
Figure 2-2 shows the relative mounting locations.
11

Figure 2-2 Bracket Mounting Locations
1
U10
U9
U8
U7
U6
2
3
The following list describes the callouts shown in Figure 2-2:
1. The U location that aligns with the top of the blades enclosure. Each enclosure is 10U high.
2. Filled squares – One of three potential cutouts (mounting holes) where you mount the
bracket's hook.
3. Circled squares – One of three potential cutouts where you locate a fastener.
Use the following procedure to determine the actual mounting locations for brackets:
1. Determine which of the interconnect module bays contain the InfiniBand switch.
Note:
There might be more than one InfiniBand switch module in some configurations.
2. Determine the rack U location that aligns with the top of the c-Class enclosure.
3. Using a pen or masking tape, mark the mount locations defined in Table 2-1.
Table 2-1 Bracket Mount Locations
Fastener CutoutBracket Hook Cut-outRelative U LocationInterconnect Module Bay
Top cutout of the next U
location below (fourth U)
Bottom cutoutThird U down from the top
of the c-Class (c7000)
enclosure
Bay 3 and 4
Bottom cutoutCenter cutoutFourth U down from the top
of the c-Class (c7000)
enclosure
Bay 5 and 6
Center cutoutTop cutoutFifth U down from the top of
the c-Class (c7000) enclosure
Bay 7 and 8
12 Aligning the Bracket

3 Installing the Cable Management Bracket
The location of the c-Class enclosure cable management bracket depends on the rack position
occupied by the HP BladeSystem c-Class enclosure. The InfiniBand switch might be installed in
any or all of the interconnect module bays identified in Table 2-1.
The kit occupies less than 1U (1.75 inches) of rack column space.
3.1 Installing the Cable Management Bracket
Use the following procedure to install the HP BladeSystem c-Class enclosure cable management
bracket:
Caution:
When performing the installation procedure, extend only one c-Class enclosure no more than a
few inches from the rack at any time. Ensure that the rack is stable before you begin the installation
procedure.
Note:
One HP BladeSystem c-Class enclosure cable management bracket is required for each InfiniBand
switch installed in the rear of the c-Class enclosure.
1. Starting from the lowest bracket location, and using the fastener locations that you identified
and marked in Chapter 2, clip a cage nut into the back of each rear rack column.
2. Hook the bracket onto the square cutouts in the rack column.
3. Fasten the bracket to the rear rack columns by using two M6 pan-head screws and tighten
them to the specified torque.
4. If more than one bracket is required, repeat Step 1.
5. Slide the c-Class enclosure back into the rack and secure it at the front of the rack as specified
in the installation instructions for the enclosure.
6. If necessary, attach the second bracket once the first switch (lowest switch in the c7000
enclosure) is cabled and tie-wrapped.
Note:
HP recommends that you only install the cable management bracket for the lowest InfiniBand
switch in the c-Class enclosure and complete the cable installation. Doing so makes it easier to
install the releasable cable ties for each of the InfiniBand cables. Once the releasable cable ties
are installed for the InfiniBand cables coming from the switch installed in the lowest interconnect
module bay, you must install the next cable management bracket and releasable cable ties for
the next InfiniBand switch. It is necessary to complete the installation for the lowest bracket first
because there is not much room between the brackets to secure the releasable cable ties when
two brackets need to be installed.
3.2 Installing the Releasable Cable Ties for the InfiniBand Cables
Figure 3-1 shows the holes in the bracket that are used in the cable management bracket for an
InfiniBand switch with 16 external uplink ports. Figure 3-2 shows the holes in the bracket that
are used for an InfiniBand switch with 8 external uplink ports.
3.1 Installing the Cable Management Bracket 13

Figure 3-1 A Cable Management Bracket Holding 16 InfiniBand Uplink Cables
2
1
3
The following list describes the callouts shown in Figure 3-1:
1. Left rear rack column
2. 16 secured InfiniBand cables
3. One of the 16 releasable cable ties (completed assembly)
14 Installing the Cable Management Bracket

Figure 3-2 A Cable Management Bracket Holding 8 InfiniBand Uplink Cables
1
3
2
The following list describes the callouts shown in Figure 3-2:
1. Left rear rack column
2. 8 secured InfiniBand cables
3. One of the 8 releasable cable ties (completed assembly)
Important:
You must install the HP BladeSystem c-Class enclosure cable management bracket to provide
proper strain relief for the InfiniBand cables.
To install the InfiniBand cables and secure them with the releasable cable ties, follow these steps:
1. Depending on the type of c-Class InfiniBand switch you have (see Figure 3-1 and Figure 3-2),
determine the appropriate holes to install the push-button mounts. The row of holes closest
to the InfiniBand switch are used for the 16 uplink port InfiniBand switch. The row of holes
furthest out from the switch are used for the 8 uplink port InfiniBand switch.
2. Install the push-button mounts by pressing them upward into each hole in the cable
management bracket for your InfiniBand switch type (see callout 4 in Figure 1-1).
3. Cable the lower InfiniBand switch first, as described in the HP BLc 4X DDR InfiniBand Gen
2 Switch Installation Guide.
4. To secure an InfiniBand cable (callout 1 in Figure 3-3) to the cable management bracket,
slide the releasable cable tie through the push button mount and around the InfiniBand
cable (see callout 2 in Figure 3-3) and through the releasable cable tie lock.
3.2 Installing the Releasable Cable Ties for the InfiniBand Cables 15

Figure 3-3 InfiniBand Cable Secured with a Releasable Cable Tie
2
1
Caution:
The releasable cable tie should only be hand tight. Do not use a cable tie installation tool
and do not over tighten the releasable cable tie or it might damage the InfiniBand cable.
5. Leaving approximately 1/4 inch to 3/8 inch coming out of the buckle, clip the excess from
the releasable cable tie. Use one of the clipped-off pieces of cable tie as a tightness gauge
(see callout 1 in Figure 3-4) to check that there is room to allow the InfiniBand cable (callout
4 in Figure 3-4) to move freely in the releasable cable tie loop (callout 3 in Figure 3-4) that is
secured to the cable management bracket (callout 2 in Figure 3-4) with a push button mount
(not shown in Figure 3-4).
Figure 3-4 Gauging the Tightness of the Releasable Cable Tie Loop
1
3
2
4
6. Repeat steps 4 and 5 to secure the remaining InfiniBand cables.
7. 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 four inch minimum
bend radius for each InfiniBand cable as you route them in the rack.
16 Installing the Cable Management Bracket

4 Removing InfiniBand Cables and Switches
This chapter describes the procedure to remove a damaged InfiniBand cable or InfiniBand switch
for repair.
4.1 Removing a Damaged Cable From the c-Class Cable Management
Bracket
To remove a damaged cable, follow these steps:
1. Bring the HP BladeSystem c-Class enclosure to an appropriate state for service as described
in the HP BladeSystem c7000 Enclosure Maintenance and Service Guide on the HP website:
http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00714237/c00714237.pdf
2. To release the InfiniBand cable from the releasable cable tie, use your finger or a small
flat-headed screw driver to push down on the small tab inside the cable tie lock (see callout
1 in Figure 4-1).
Figure 4-1 Cable Tie Release Tab
1
Note:
The release tab is very small and might be difficult to reach with your finger. Use a small
flat-headed screw driver to push the tab down to release the cable tie. 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 screw driver. Be
very careful not to damage other InfiniBand cables while using pliers or a screw driver.
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 more information on how to remove an InfiniBand cable from the
switch, see the HP BLc 4X DDR InfiniBand Gen 2 Switch Installation Guide.
4.2 InfiniBand Switch Removal
Put the rack cabinet into a safe and stable state for component removal. You must ensure that
you can reach the component easily and handle it safely.
To remove the InfiniBand switch, follow these steps:
1. Bring the HP BladeSystem c-Class enclosure to an appropriate state for service as described
in the HP BladeSystem c7000 Enclosure Maintenance and Service Guide on the HP web site:
http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00714237/c00714237.pdf
2. Remove all of the InfiniBand cables from the InfiniBand switch, but leave them secured in
the cable management bracket.
4.1 Removing a Damaged Cable From the c-Class Cable Management Bracket 17

3. Remove the cable management bracket from the rack's rear 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 four-inch minimum bend radius.
5. Push the blade handle release button to release the blade handle.
6. Open the blade handle and slide the switch all the way out of the HP BladeSystem c7000
enclosure.
18 Removing InfiniBand Cables and Switches

19

*436670-doc*
Printed in the US