Transcript
HP Linux Clusters QsNetII Cable Management Kit Installation Guide
Part Number: AA-RVWCA-TE
March 2004
Revision/Update Information:
This is a new manual.
This document describes how to install the QsNetII Cable Management Kit into an HP Model 10642 rack.
Hewlett-Packard Company Palo Alto, California
© Copyright 2004 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. Quadrics® is a registered trademark and QsNetII™ is a trademark of Quadrics Ltd. Linux® is a U.S. registered trademark of Linus Torvalds. Printed in the U.S.A.
QsNet Cable Management Kit Installation Guide II
You use this kit when installing a QsNetII™ interconnect into an HP Linux® Cluster. This kit offers the following features: •
Provides strain relief for connectors, maintaining the alignment of plugs and ports with the specified 10 degree limit of deviation from horizontal.
•
Maintains the bend radius of the cables within the specified tolerances.
•
Facilitates organization and routing of the cables.
•
Facilitates servicing of the interconnect line cards and individual cables.
1 Audience HP service representatives and other persons trained to install hardware mounting options and system components 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 to others.
2 Documentation Resources You can download the documentation for components referenced in this installation guide from the following locations: •
HP Model 10642 Rack: http://h18004.www1.hp.com/products/servers/proliantstorage/racks (Select the 10000-series rack and open the Documentation option on the Web page menu.)
•
HP Linux clusters: http://www.hp.com/techservers/clusters/xc_clusters.html
3 Overview of the Installation Procedure Complete the following steps to install the kit: 1.
Verify the kit contents.
2.
Orient the kit for installation.
3.
Prepare for installation.
4.
Gather required resources.
5.
Identify the installation location in the rack.
6.
Install the kit in the rack.
The installation of a single kit should take no more than 20 minutes to complete. Two kits are required if you plan to install two interconnects in the rack.
4 Verifying Kit Contents The kit contains the following components:
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Eight cable management bars, identified by callout 1 in Figure 1. Each bar provides 16 cable hooks. There is a spring-loaded retainer pin at the top of each bar, identified by callout 2 in Figure 1.
•
Two rear bar brackets, which stand off the rear rack columns and are identified as follows:
•
-
An upper rear bracket, which provides four retainer holes for the spring-loaded pins at the top of each bar. This bracket is identified by callout 3 in Figure 1.
-
A lower rear bracket, which provides four pairs of mounting lugs for each cable management bar. This bracket is identified by callout 4 in Figure 1.
Two front bar brackets, which are inset between the front rack columns and are identified as follows: -
An upper front bracket, which provides four retainer holes for the spring-loaded pins at the top of each bar. This bracket is identified by callout 5 in Figure 1.
-
A lower front bracket, which provides four pairs of mounting lugs for each cable management bar. This bracket is identified by callout 6 in Figure 1.
•
A cable guide plate that you attach to the frame at the rear of the rack (not the rack columns) and provides a routing guide and support for cable bundles. This guide plate is required only for interconnects installed into the upper part of the rack.
•
Eighteen straps with hook-and-loop closures, which are supplied with the cable guide plate to secure the cable bundles. There are 9 short straps and 9 long straps that you use depending on the diameter of the cable bundle.
•
Table 1 specifies the fasteners included in the kit. Table 1: Installation Kit Fasteners
•
Qty. Size
Type
8
10–32
Shoulder screw Flat(pivot pin) blade
16
M6 x 16 mm
Pan-head machine screw
Phillips 30 in/lb Pan-head screw used with (Posidrive) cage nut M6.
16
M6
Cage nut
Cage nut N/A insertion tool
2
Phillips N/A 10-32 x .5” Pan-head thread-forming (Posidrive) screw
9
M5 x 10 mm
Pan-head machine screw
Tool
T25 Torx
Torque Description Handtight
Secures the cable management bar to the lower bracket and enables it to swing up or down.
An enclosed nut that clips onto the rack columns. Used with M6 pan-head screw. Attaches the cable guide plate to the horizontal rack frame.
30 in/lb Attaches the straps to the cable guide plate.
Packaging and documentation.
To prevent screws from becoming loose due to vibration, HP recommends that you use an adjustable torque driver set to the torque specifications given in Table 1. Contact your HP sales representative if any parts are missing.
5 Orienting and Positioning the Components Figure 1 shows the orientation of the cable management bars relative to the rack and the interconnect. See Figure 2 for the orientation of the optional cable guide plate.
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Figure 1: Rack Orientation
Cage Nut M6 5 3
2
1
4 6
M6 x 16mm Screw Rear of Rack
Front of Rack zk-2077
6 Preparing for Installation Prepare for installation as follows: •
Ensure that the cluster is shut down and powered off so that you can perform the installation.
•
Remove the rack front and rear doors and side panels for ease of installation. Verify that the rack is secure and stable enough to work on, and always install the lowest components first.
•
Prepare a suitable work surface, such as a table, on which you can safely stack the unpacked parts and have room to attach the brackets to the interconnect.
•
Determine the correct cable routing and bundling procedures for your interconnect. This information is located in the documentation supplied with your cluster. You will need to reference this information when cabling the system.
7 Gathering Required Resources To install the kit, you require the following resources: •
Tools: -
6-inch long Phillips (Posidrive or cross-point) with a P2 (medium) tip. A power screwdriver with a P2 bit is recommended.
-
One of the following:
3
8-inch long flat-blade screwdriver with a 0.25-inch wide blade.
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3
•
Offset screwdriver (or ratchet driver) with a 0.25-inch wide flat-blade tip.
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T25 Torx driver.
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Cage nut insertion tool (optional).
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Marker, pencil, or masking tape to identify mount locations.
Environment: -
A work surface adjacent to the rack.
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A small work platform, stable stepladder, or step stool. _____________________
Caution
____________________
Always install components into a rack working from the bottom of the rack upwards. •
Interconnect Port Covers (not provided in this kit) If you disconnect a cable from a live port and do not intend to replace the cable immediately, the uncovered port will radiate electromagnetic interference (EMI). This EMI might affect the operation of the interconnect and adjacent components. Ensure that you cover all functioning ports with the appropriate EMI shield.
8 Determining the Installation Location You can install one or two kits in a single Interconnect Building Block (IBB). Depending on the type of IBB, you mount the brackets at the rack locations specified in Table 2. Each numbered rack position has three mounting holes, identified as top, middle, and bottom. A mounting position is specified by its position number and the relevant hole, such as 34 top. Table 2: Rack Mounting Locations Interconnect Location
Bracket
Rack Mount Position
Single Interconnect IBB
Lower front, lower rear
08 bottom, 08 top
Upper front
18 middle, 19 bottom
Upper rear
19 middle, 20 bottom
Lower front, lower rear
27 bottom, 27 top
Upper front
37 middle, 38 bottom
Upper rear
38 middle, 39 bottom
Lower front, lower rear
07 bottom, 07 top
Upper front
17 middle, 18 bottom
Upper rear
18 middle, 19 bottom
Dual Interconnect IBB, top interconnect
Dual Interconnect IBB, bottom interconnect
________________________
Caution
_______________________
Do not attempt to mount the kit in any position other than those specified in Table 2. Doing so will put strain on the cable connections
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and might prevent the removal of field-replaceable components, such as the interconnect’s cooling fan tray.
9 Installing the Kit Install the kit as follows: 1.
If you are installing this cable management kit into an Interconnect Building Block (IBB) that contains two interconnects, you must first install the cable guide plates as described in step 1. If you are installing the kit into an IBB that contains one interconnect in the lower rack location only, you do not need to install the cable guide plate. Figure 2 shows the installation of the plate , and shows how the cables are routed down the plate. Figure 2: Installing and Using the Cable Guide Plate
Y Z [
X
Rear of Rack zk-2078
Working at the rear of the rack, use the following procedure to install the plate: a.
Fit the pins in the base of the plate (callout 1) into the holes on the rack frame as indicated by the dotted line.
b.
Align the plate so that the leftmost screw slot in the top of the plate aligns with the second screw hole in the rack frame (callout 2).
c.
Using a Phillips (Posidrive) screwdriver, secure the plate with two 10-32 x .05” pan-head thread-forming screws (callout 3).
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_____________________
Note
_____________________
Hand-tighten the thread-forming screw to avoid overtightening it. Overtightening can easily strip out the formed thread. d.
Repeat steps a through c for the right-hand plate, if required. (Typically, you need to install the right-hand plate only if more than half the interconnect’s ports are in use.)
2.
Using the information in Table 2, determine the rack location and mark the fastener mounting positions on the rack columns. There are 16 fastener locations, four for each rack.
3.
Clip a cage nut into the back of each mounting position, for a total of 16 cage nuts.
4.
Secure each pair of brackets to the front and the rear of the rack using four M6 x 16 mm pan-head screws for each bracket, a total of 16 screws for all four brackets. See Figure 1 for the correct orientation of the brackets. Figure 3 shows how to mount the rear top bracket. Figure 3: Securing the Rear Top Bracket
M6 Cage Nut (4X)
M6 x 16mm Screw (4X)
Top Bracket
Rear of Rack zk-2080
Figure 4 shows how to mount the rear bottom bracket.
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Figure 4: Securing the Rear Bottom Bracket
M6 Cage Nut (4X)
M6 x 16mm Screw (4X)
Rear of Rack zk-2081
5.
Prepare the eight cable support bars for installation by retracting the spring-loaded retainer pin at the top of each bar. Pull the pin down and rotate it until the pin locks in the retracted position as shown in Figure 5. Figure 5: Locking the Retainer Pin
X Y
1
Pin in Closed Position
Pin in Open Position zk-2082
6.
Orient a cable support bar so that the cable support hooks are on the right-hand side. Place the bottom of the bar between the flanges on the lower bracket as shown in Figure 6, callout 1. Insert a pivot pin and secure it loosely a few turns with your fingers as shown in shown in Figure 6, callout 2.
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Figure 6: Inserting a Bar and its Pivot Pin
X
Y
zk-2083
7.
Swing the bar upward and align the locking pin with its corresponding hole in the top bracket. Release the locking pin, securing the bar in place.
8.
Using a flat-blade screwdriver, hand-tighten the pivot pin. _______________________
Note
_______________________
Because of the position of adjacent set of flanges, it may be difficult to insert the screwdriver blade in the pin’s slot. An offset screwdriver is recommended. 9.
Repeat steps 8 and 9 for the remaining seven cable support bars on both the front and back of the rack.
10 Cabling Procedure Follow the cabling sequence instructions for the interconnect cables as described in the documentation for your cluster. The cabling instructions are designed to ensure that the correct number of cables are grouped and bound together, then routed along the rack’s cable management system. It is important that you use the cable management guidelines for the specific installation that you are configuring and that you maintain the correct maximum bend radius for the cables. Bending a cable beyond its limit can cause internal damage to the cable, EMI interference, or cause a poor connection at the ports. A general cabling procedure for each cable is as follows:
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1.
Following the cabling diagrams and procedures for your cluster, plan the route for the cables and determine the direction from which you will begin the routing procedure (server-to-interconnect or interconnect-to-server).
2.
Route a cable, feeding it through the open raceway beneath the interconnect.
3.
Working from the bottom up at each 16-port card, remove the cover from the port.
4.
Identify the appropriate cable for the port and hook it into the cable management bar as shown by callout 1 in Figure 7.
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Figure 7: Cabling the Interconnect
2
1
3 zk-2084
5.
Slide the cable forward until its connector aligns with the port (callout 3 in Figure 7), and secure the cable by pushing only on the metal connector body (callout 2 in Figure 7). Ensure that you keep the connector level and square with the port as you insert it.
6.
Repeat steps 2 through 5 for all remaining cables. If you are installing an interconnect into the upper part of the rack, proceed to step 7. Otherwise, the installation procedure is compete at this point.
7.
If you are installing an interconnect into the upper part of a dual-interconnect IBB, you must route the cables down the guide plate and support them by using the cable straps as shown in Figure 2, callout 4. Use the appropriate length strap for the cable bundle diameter. You need only use enough straps to keep the cable bundles tight to the plate, so that they do not interfere with the servicing of interconnect components. Figure 8 shows how to attach one of the straps to the cable guide plate. Figure 8: Bundling and Routing the Cables
X
Y Z
zk-2079
Starting from the top of the cable guide plate and working downwards, use the following procedure to attach the straps: a.
Using the leftmost screw holes in the cable guide plate, attach the strap by using an M5 x 10 mm Torx screw (callout 1).
b.
Feed the end of the strap through the cutout in the left of the cable guide plate (callout 2).
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c.
When securing cables with the strap, loop the end of the strap through the metal D ring and secure it with the hook-and-loop closure (callout 3).
d.
Repeat steps a through c for the remaining straps.
11 Servicing the Interconnect To service the interconnect, use the following procedures. Replacing a Cable Use the following procedure to replace a malfunctioning cable: 1.
Consult the documentation for your interconnect to determine the link (cable) removal prerequisites. For example, you should determine the correct procedure for shutting down and powering off nodes or any interconnect components.
2.
Route a replacement cable from the node to the interconnect, following the cable routing and bundling instructions for your cluster.
3.
After bringing the link to an appropriate state, disconnect the malfunctioning cable. _______________________
Note
_______________________
If you are not ready to connect a replacement cable immediately, cover any active interconnect ports with an EMI-shielded cap. 4.
Hook the cable into the cable management bar and connect it to the interconnect port.
5.
To replace a cable in the top interconnect of a dual-interconnect IBB, secure the new cable to the cable guide plate. See Section 10 for the cable strapping procedure.
HP recommends that you do not attempt to remove defective cables unless it is necessary to return them for servicing. Label the cable as defective and secure it out of the way of other cables and components. Servicing an Interconnect’s Port Card Use the following procedure to service an interconnect’s port cards:
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1.
Consult the documentation for your cluster and interconnect to determine the card removal prerequisites. For example, you should determine whether or not you need to shut down and power off the associated nodes or any interconnect components.
2.
Disconnect all cable plugs from the interconnect ports.
3.
At the top of the cable management bar, pull down the spring-loaded retainer pin and rotate it until the pin is locked in the retracted position, as shown in Figure 5.
4.
Swing the cable management bar down 90 degrees, allowing the cables to hang freely below it or loop onto the floor.
5.
Perform the required service operation on the interconnect.
6.
When the service operation is complete, swing the cable management bar up 90 degrees and release the spring-loaded retainer pin. Ensure that the pin is inserted firmly into the upper bracket.
7.
Reconnect the cables to their respective ports.
QsNetII Cable Management Kit Installation Guide
12 Removing the Cable Management Kit Remove the rear cable management brackets and bars only if you are removing an entire interconnect chassis. You remove the interconnect chassis by sliding it out of the rear of the rack. If the cables are not labeled for their respective ports, you might want to label them prior to disconnecting any cables. Remove the rear cable management brackets and bars as follows: ________________________
Caution
_______________________
Before beginning any component removal procedures, power off the interconnect by using the breaker switch at the power distribution unit unless the component is designated as hot-swappable. Consult the documentation for you cluster to confirm whether a component is hot-swappable. If you intend to remove the interconnect chassis from the rack, ensure that all cables (such as network, power and interconnect) are disconnected as described in the Service documentation for the model of interconnect. 1.
Disconnect the cables and remove them from the hooks. Support any unfastened cables so that their specified bend radius is not exceeded.
2.
For each of the eight cable management bars, pull down on its spring-loaded retainer pin and swing the bar down 90 degrees.
3.
Beginning with the upper rear bracket, remove the four M6 X 16 mm pan-head screws that retain it to the rack. If you intend to replace the kit, do not remove the cage nuts from the rack columns.
4.
If you are replacing an interconnect chassis, do not disassemble the cable management bars from the lower brackets. However, because the bracket-and-bar assembly is heavy, two people are required to remove it safely. One person should support the weight of the assembly while another person removes the four M6 X 16 mm pan-head screws from the lower bracket.
5.
You do not need to remove the cable guide plates. However, take care to route any disconnected cables out of the way of the interconnect before you attempt to remove it. _____________________
Warning
_____________________
The interconnect is heavy and two persons are required to remove it from the rack. Consult the service documentation for your cluster before attempting to remove the interconnect chassis from the rack.
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