HP BL20p, ProLiant BL p-Class Setup And Installation Manual
HP ProLiant BL p-Class System
Setup and Installation Guide
January 2003 (Second Edition)
Part Number 230852-002
Hewlett-Packard Company shall not be liable for technical or editorial errors or omissions
contained herein. The information in this document is provided “as is” without warranty of
any kind and is subject to change without notice. The warranties for HP products are set forth
in the express limited warranty statements accompanying such products. Nothing herein
should be construed as constituting an additional warranty.
HP ProLiant BL p-Class System Setup and Installation Guide
January 2003 (Second Edition)
Part Number 230852-002
Contents
About This Guide
Audience Assumptions..................................................................................................... vii
Important Safety Information ........................................................................................... vii
Symbols on Equipment .................................................................................................... vii
Rack Stability .................................................................................................................... ix
Symbols in Text.................................................................................................................ix
Related Documents..............................................................................................................x
Getting Help ........................................................................................................................x
Technical Support .........................................................................................................x
HP Website ................................................................................................................. xi
Authorized Reseller .................................................................................................... xi
Optional Installation Service ............................................................................................. xi
Reader’s Comments ......................................................................................................... xii
Chapter 1
System Features
Minimum Hardware Requirements ................................................................................. 1-1
Power Components ................................................................................................... 1-5
LEDs ......................................................................................................................... 1-5
Configuration and Management Features ....................................................................... 1-6
Diagnostic Features ......................................................................................................... 1-7
Chapter 2
Planning the Installation
Optimum Environment.................................................................................................... 2-2
Rack Requirements ................................................................................................... 2-2
Space and Airflow Requirements ............................................................................. 2-2
HP ProLiant BL p-Class System Setup and Installation Guide iii
Contents
Temperature Requirements .......................................................................................2-3
Power Requirements..................................................................................................2-4
Grounding Requirements ..........................................................................................2-4
Rack Warnings................................................................................................................. 2-5
System Warnings and Cautions .......................................................................................2-6
Chapter 3
Installing System Hardware
Installing System Enclosures ........................................................................................... 3-1
Measuring with the Rack Template...........................................................................3-2
Installing the Rack Rails and Cage Nuts ...................................................................3-2
Installing Enclosures into the Rack ........................................................................... 3-6
Hot-Plug Power Supplies.................................................................................................3-8
Identifying Power Supply Bays................................................................................. 3-9
Installation Guidelines.............................................................................................3-10
Installing a Hot-Plug Power Supply........................................................................3-11
Installing a Power Supply Blank ............................................................................. 3-12
Interconnects..................................................................................................................3-13
Power Distribution Components.................................................................................... 3-16
Installation Guidelines.............................................................................................3-16
Installing a Bus Bar .................................................................................................3-16
Additional System Hardware.........................................................................................3-19
Chapter 4
Cabling and Powering Up the System
Identifying System Components......................................................................................4-1
Enclosures and Management Modules......................................................................4-2
Scalable and Mini Bus Bar Components................................................................... 4-4
Power Bus Box Components.....................................................................................4-6
Cabling the System ..........................................................................................................4-7
Overview ...................................................................................................................4-7
Cabling Configuration Diagrams ..............................................................................4-8
Management Modules ............................................................................................. 4-14
Grounding Cable in Facility DC Power Environments...........................................4-17
Bus Bars ..................................................................................................................4-18
Load-Balancing Signal Cable.................................................................................. 4-23
Cable Bracket ..........................................................................................................4-24
Powering Up the System................................................................................................4-26
iv HP ProLiant BL p-Class System Setup and Installation Guide
Appendix A
Regulatory Compliance Notices
Regulatory Compliance Identification Numbers............................................................ A-1
Federal Communications Commission Notice............................................................... A-1
Class A Equipment .................................................................................................. A-2
Modifications ........................................................................................................... A-2
Cables....................................................................................................................... A-2
Canadian Notice (Avis Canadien) .................................................................................. A-2
European Union Notice .................................................................................................. A-3
Japanese Notice .............................................................................................................. A-3
Taiwanese Notice ........................................................................................................... A-3
Battery Replacement Notice........................................................................................... A-4
Appendix B
Electrostatic Discharge
Preventing Electrostatic Damage ....................................................................................B-1
Grounding Methods.........................................................................................................B-2
Appendix C
Troubleshooting
When the System Does Not Power Up............................................................................C-1
System Power Diagnostic Steps................................................................................C-2
Contents
Appendix D
LEDs and Switches
LEDs............................................................................................................................... D-1
Server Blade Enclosure............................................................................................ D-2
Server Blade Management Module ......................................................................... D-3
Power Management Module .................................................................................... D-4
Power Enclosure ...................................................................................................... D-6
Hot-Plug Power Supply ........................................................................................... D-7
Bus Bar .................................................................................................................... D-8
Diagnostic Station.................................................................................................... D-9
Buttons and Switches ................................................................................................... D-10
Power Configuration Switches .............................................................................. D-10
HP ProLiant BL p-Class System Setup and Installation Guide v
Contents
Appendix E
Specifications
Server Blade Enclosure................................................................................................... E-1
Power Enclosures............................................................................................................ E-3
North America/Japan................................................................................................ E-3
International ............................................................................................................. E-5
Hot-Plug Power Supply .................................................................................................. E-7
Power Distribution Devices ............................................................................................ E-9
Facility DC.................................................................................................................... E-11
Index
vi HP ProLiant BL p-Class System Setup and Installation Guide
This guide provides step-by-step instructions for installation and reference
information for operation, troubleshooting, and future upgrades of the HP ProLiant
BL p-Class System.
Audience Assumptions
This guide is for the person who installs, administers, and troubleshoots servers.
HP assumes you are qualified in the servicing of computer equipment and trained in
recognizing hazards in products with hazardous energy levels.
About This Guide
Important Safety Information
Before installing this product, read the Important Safety Information document
included with the server blade.
Symbols on Equipment
The following symbols may be placed on equipment to indicate the presence of
potentially hazardous conditions:
WARNING: This symbol, in conjunction with any of the following symbols,
indicates the presence of a potential hazard. The potential for injury exists if
warnings are not observed. Consult the documentation for specific details.
HP ProLiant BL p-Class System Setup and Installation Guide vii
About This Guide
Weight in kg
Weight in lb
This symbol indicates the presence of hazardous energy circuits or electric
shock hazards. Refer all servicing to qualified personnel.
WARNING: To reduce the risk of injury from electric shock hazards, do not
open this enclosure. Refer all maintenance, upgrades, and servicing to
qualified personnel.
This symbol indicates the presence of electric shock hazards. The area
contains no user or field serviceable parts. Do not open for any reason.
WARNING: To reduce the risk of injury from electric shock hazards, do not
open this enclosure.
This symbol on an RJ-45 receptacle indicates a network interface connection.
WARNING: To reduce the risk of electric shock, fire, or damage to the
equipment, do not plug telephone or telecommunications connectors into this
receptacle.
This symbol indicates the presence of a hot surface or hot component. If this
surface is contacted, the potential for injury exists.
WARNING: To reduce the risk of injury from a hot component, allow the
surface to cool before touching.
These symbols, on power supplies or systems, indicate that the
equipment is supplied by multiple sources of power.
WARNING: To reduce the risk of injury from electric shock,
remove all power cords to completely disconnect power from the
system.
This symbol indicates that the component exceeds the recommended
weight for one individual to handle safely.
WARNING: To reduce the risk of personal injury or damage to the
equipment, observe local occupational health and safety requirements
and guidelines for manual material handling.
viii HP ProLiant BL p-Class System Setup and Installation Guide
Rack Stability
WARNING: To reduce the risk of personal injury or damage to the equipment,
be sure that:
• The leveling jacks are extended to the floor.
• The full weight of the rack rests on the leveling jacks.
• The stabilizing feet are attached to the rack if it is a single-rack installation.
• The racks are coupled together in multiple-rack installations.
Symbols in Text
These symbols may be found in the text of this guide. They have the following
meanings:
WARNING: Text set off in this manner indicates that failure to follow directions
in the warning could result in bodily harm or loss of life.
CAUTION: Text set off in this manner indicates that failure to follow directions could
result in damage to equipment or loss of information.
About This Guide
IMPORTANT: Text set off in this manner presents essential information to explain a concept
or complete a task.
NOTE: Text set off in this manner presents additional information to emphasize or supplement
important points of the main text.
HP ProLiant BL p-Class System Setup and Installation Guide ix
About This Guide
Related Documents
For additional information on the topics covered in this guide, refer to the following
documentation:
• HP ProLiant BL p-Class System Maintenance and Service Guide
• HP ProLiant BL p-Class Server Blade Setup and Installation Guide
• HP ProLiant BL p-Class System Hardware Installation and Configuration Poster
• Servers Troubleshooting Guide
• Integrated Lights-Out User Guide
• ROM-Based Setup Utility User Guide
• White paper: ProLiant BL p-Class System Overview and Planning
• White paper: Configuring a Preboot Execution Environment (PXE) using Red
Hat Linux 7.2 on ProLiant Servers
• ProLiant BL p-Class QuickSpecs
Getting Help
If you have a problem and have exhausted the information in this guide, you can get
further information and other help in the following locations.
Technical Support
In North America, call the HP Technical Support Phone Center at 1-800-652-6672.
This service is available 24 hours a day, 7 days a week. For continuous quality
improvement, calls may be recorded or monitored. Outside North America, call the
nearest HP Technical Support Phone Center. Telephone numbers for worldwide
Technical Support Centers are listed on the HP website,
Be sure to have the following information available before you call HP:
• Technical support registration number (if applicable)
x HP ProLiant BL p-Class System Setup and Installation Guide
www.hp.com.
• Product serial number
• Product model name and number
• Applicable error messages
• Add-on boards or hardware
• Third-party hardware or software
• Operating system type and revision level
HP Website
The HP website has information on this product as well as the latest drivers and flash
ROM images. You can access the HP website at
Authorized Reseller
For the name of the nearest authorized reseller:
• In the United States, call 1-800-345-1518.
About This Guide
www.hp.com.
• In Canada, call 1-800-263-5868.
• Elsewhere, see the HP website for locations and telephone numbers.
Optional Installation Service
You may choose to have HP install the system. The installation service, as well as
other services, can be purchased as a CarePaq packaged service or as a customized
service agreement to meet your specific requirements.
The optional installation services are available in all countries where HP has a direct
or indirect service presence. In these countries, service may be ordered from and
directly provided by an HP authorized service reseller, or they may be ordered
directly from HP services.
In the U.S. only, customized or CarePaq services may be ordered by calling
1-800-652-6672.
HP ProLiant BL p-Class System Setup and Installation Guide xi
About This Guide
For ordering information, refer to
www.hp.com
Reader’s Comments
HP welcomes your comments on this guide. Please send your comments and
suggestions by e-mail to
ServerDocumentation@hp.com.
xii HP ProLiant BL p-Class System Setup and Installation Guide
The HP ProLiant BL p-Class system offers a range of power and performance for
large-volume rollouts in space-constrained environments. The ProLiant BL p-Class
system architecture is a revolutionary step in server modularity that stresses rapid
deployment and remote management.
Minimum Hardware Requirements
To set up the system, you must choose and install several of the modular
components. The following hardware components are required to operate a
ProLiant BL p-Class system. For specific features and supported configurations, refer
to the system QuickSpecs or the ProLiant BL p-Class System Overview and Planning
white paper.
1
System Features
• One ProLiant BL p-Class server blade
• One ProLiant BL p-Class server blade enclosure
• One pair of interconnects
• One single-phase or three-phase ProLiant BL p-Class power enclosure with hot-
plug power supplies, if using AC power—or—one facility DC cable kit, if using
your own DC power
• One pair of power distribution devices (bus bars or power bus box)
• One Compaq branded, telco, or third-party rack cabinet
NOTE: For third-party rack cabinet requirements, refer to the “Rack Requirements” section in
Chapter 2, “Planning the Installation.”
HP ProLiant BL p-Class System Setup and Installation Guide 1-1
System Features
Figures 1-1 and 1-2 and Tables 1-1 and 1-2 identify system components. The scalable
configuration is shown on the left, and the full-rack 42U configuration (two pairs of
mini bus bars) is shown on the right.
Figure 1-1: System components in a 42U rack (front)
1-2 HP ProLiant BL p-Class System Setup and Installation Guide
System Features
Table 1-1: System Components (Front)
Item Description
1 Server blade enclosures
2 Server blades
3 Interconnects
4 Power enclosures
5 Hot-plug power supplies
HP ProLiant BL p-Class System Setup and Installation Guide 1-3
System Features
Figure 1-2: System components in a 42U rack (rear,
cables removed for clarity)
Table 1-2: System Components (Rear)
Item Description
1 Server blade enclosures
2 Interconnect modules
continued
1-4 HP ProLiant BL p-Class System Setup and Installation Guide
Table 1-2: System Components (Rear) continued
Item Description
3 Power enclosures
4 Mini bus bars* (pair)
5 Scalable bus bars (pair)
* Two mini bus bar pairs support a full-rack (42U)
configuration.
Power Components
The system requires bus bars or power bus boxes to distribute power to the server
blade enclosures. Table 1-3 identifies enclosure capabilities for each device.
Table 1-3: Power Distribution Schemes
System Features
LEDs
Power
Components
Scalable bus bars Up to 2 Up to 5
Mini bus bars 1 Up to 3
Mini bus bars × 2 2 Up to 6
Power bus boxes 1 1
Power Enclosures or
Facility DC Feeds
Server Blade Enclosures
Supported
The system contains several sets of LEDs that indicate the status of hardware
components and settings. For a detailed explanation of LEDs, refer to Appendix D,
“LEDs and Switches.”
HP ProLiant BL p-Class System Setup and Installation Guide 1-5
System Features
Configuration and Management Features
HP offers an extensive set of features and optional tools to support effective server
blade configuration and management:
• ProLiant Essentials Rapid Deployment Pack
• ROM-Based Setup Utility (RBSU)
• Option ROM Configuration for Arrays (ORCA) Utility
• Redundant ROM Support
• Remote ROM flash
• ROMPaq Utility
• Insight Manager 7
• Diagnostics Utility
• Automatic Server Recovery-2 (ASR-2)
• Integrated Management Log (IML)
For more detailed information about these tools and utilities, refer to the
documentation that ships with the system.
1-6 HP ProLiant BL p-Class System Setup and Installation Guide
Diagnostic Features
Hardware, software, and firmware diagnostic tools available for your use include:
• System LEDs
• Diagnostic station
• Diagnostic cable
• Diagnostic port
• Insight Manager 7
• Power-On Self Test (POST)
• Server Diagnostics
For more information about diagnostic tools, refer to the software documentation that
ships with the system.
System Features
HP ProLiant BL p-Class System Setup and Installation Guide 1-7
2
Planning the Installation
For maximum performance and availability from the server blade, be sure that the
operating environment meets the required specifications for the following:
• Rack compatibility
• Space and airflow
• Temperature
• Power
• Electrical grounding
• Floor strength
Refer to the “Optimum Environment” section in this chapter and the ProLiant
BL p-Class System Overview and Planning white paper that is available on the
Documentation CD or at
www.hp.com
HP ProLiant BL p-Class System Setup and Installation Guide 2-1
Planning the Installation
Optimum Environment
When installing the ProLiant BL p-Class system in a rack, select a location that meets
the environmental standards described in the following paragraphs.
Rack Requirements
The ProLiant BL p-Class system is compatible with the following racks:
• 42U, 36U, and 22U Compaq branded racks
— Compaq branded 10000 and 9000 Series racks (42U, 36U, and 22U) are
compatible. (The system is optimized for 10000 Series racks.)
— Compaq branded 7000 Series 42U racks require an extension kit (P/N
154392-B21) to increase rack depth from 83.82 cm (33 inches) to 93.98 cm
(37 inches). The 7000 Series 36U and 22U racks are not compatible.
• Telco racks
• Third-party rack cabinets that meet the following requirements:
— Standard 48.26-cm (19-inch) width
— Depth of 73.66 cm (29 inches) between front and rear RETMA rails
— Minimum 7.62 cm (3 inches) clearance between rear RETMA rails and rear
rack door to accommodate system cabling
— Front and rear doors must have a minimum of 65 percent open area to
provide adequate airflow
Space and Airflow Requirements
To enable servicing and adequate airflow, observe the following spatial requirements
when deciding where to install a Compaq branded, telco, or third-party rack:
• Leave a minimum clearance of 63.5 cm (25 inches) in front of the rack.
• Leave a minimum clearance of 76.2 cm (30 inches) in back of the rack.
• Leave a minimum clearance of 121.9 cm (48 inches) from the back of the rack to
the rear of another rack or row of racks.
2-2 HP ProLiant BL p-Class System Setup and Installation Guide
Planning the Installation
ProLiant servers draw in cool air through the front door and expel warm air through
the rear door. Therefore, the front and rear rack doors must be adequately ventilated
to enable ambient room air to enter the cabinet, and the rear door must be adequately
ventilated to enable the warm air to escape from the cabinet.
IMPORTANT: Do not block the ventilation openings.
When any vertical space in the rack is not filled by servers or rack components, the
gaps between the components cause changes in airflow through the rack and across
the servers. Cover all gaps with server blanks to maintain proper airflow.
Compaq branded 9000 Series racks provide proper server cooling from flow-through
perforations in the front and rear doors that provide 65 percent open area for
ventilation.
CAUTION: When using a Compaq branded 7000 Series rack, you must install the
high airflow rack door insert [P/N 327281-B21 (42U)] to provide proper front-to-back
airflow and cooling.
CAUTION: Always use server blanks to fill empty vertical spaces in the rack. This
arrangement ensures proper airflow. Using a rack without server blanks results in
improper cooling that can lead to thermal damage.
Temperature Requirements
To ensure continued safe and reliable equipment operation, install or locate the
system in a well-ventilated, climate-controlled environment.
The maximum recommended ambient operating temperature (TMRA) for most
server products is 35°C (95°F). The temperature in the room where the rack is
located must not exceed 35°C
HP ProLiant BL p-Class System Setup and Installation Guide 2-3
(95°F).
Planning the Installation
Power Requirements
WARNING: Risk of fire or damage to the equipment.
Each AC power cord for the power enclosure has an electrical rating based on
the model and power supply configuration. The rating is marked on the side of
the enclosure. It is important that the system be configured and loaded
according to the guidelines in the ProLiant BL p-Class System Overview and
Planning white paper. Failure to follow these guidelines may result in an
overload of the electrical circuits feeding the power enclosure.
Also, when performing system upgrades, you must refer back to the ProLiant
BL p-Class System Overview and Planning white paper to be sure that the new
configuration does not overload the existing power enclosure scheme.
WARNING: To reduce the risk of personal injury, fire, or damage to the
equipment, do not overload the AC supply branch circuit that provides power
to the rack. Consult the electrical authority having jurisdiction over your
facility’s wiring and installation requirements.
The installation of this equipment shall be in accordance with local/regional electrical
regulations governing the installation of information technology equipment by
licensed electricians. This equipment is designed to operate in installations covered
by NFPA 70, 1999 Edition (National Electric Code) and NFPA 75, 1992 Edition
(code for Protection of Electronic Computer/Data Processing Equipment).
Grounding Requirements
For proper operation and safety, the server must be properly grounded. In the
United States, you must install the equipment in accordance with NFPA 70, 1999
Edition (National Electric Code) Article 250 as well as any local and regional
building codes. In Canada, the equipment must be installed in accordance with
Canadian Standards Association, CSA C22.1, Canadian Electrical Code.
In all other countries, the installation must follow any regional or national electrical
wiring codes, such as the International Electrotechnical Commission (IEC) 364, parts
1 through 7. Furthermore, you must be sure that all power distribution devices used
in the installation—such as branch wiring and receptacles—are listed or certified
grounding-type devices.
2-4 HP ProLiant BL p-Class System Setup and Installation Guide
Rack Warnings
Before installing the rack, observe the following warnings:
WARNING: To reduce the risk of personal injury or equipment damage, always
be sure that the rack is adequately stabilized before installing or removing a
component.
WARNING: To reduce the risk of personal injury or equipment damage, be
sure that:
• The leveling jacks are extended to the floor.
• The full weight of the rack rests on the leveling jacks.
• The stabilizers are attached to the rack for single-rack installation.
• The racks are installed together in multiple-rack installations.
WARNING: To reduce the risk of personal injury or equipment damage, at
least two people are needed to safely unload the rack from the pallet. An empty
42U rack can weigh as much as 115 kg (253 lb), can stand more than 2.1 m
(7 ft) tall, and may become unstable when being moved on its casters.
Never stand in front of the rack when it is rolling down the ramp from the
pallet; always handle the rack from both sides.
WARNING: When installing enclosures in a telco rack, be sure that the rack
frame is adequately secured to the top and bottom of the building structure.
Planning the Installation
HP ProLiant BL p-Class System Setup and Installation Guide 2-5
Planning the Installation
System Warnings and Cautions
Before installing the system, carefully review the following warnings and cautions:
WARNING: To reduce the risk of personal injury or damage to equipment,
heed all warnings and cautions throughout the installation instructions.
WARNING: To reduce the risk of electric shock or damage to the equipment,
only enter or perform service on specific parts of the system as instructed in
the user documentation.
WARNING: A risk of electric shock from high leakage current exists. Before
connecting the AC supply to the power enclosures, be sure that the electrical
outlets are properly earth grounded.
WARNING: A risk of injury from electric shock and hazardous energy levels
exists.
Each power enclosure has two separate power supply cords. A single
rack/cabinet may contain up to two power enclosures. In all cases, power is
supplied in a redundant fashion and removing any single source of power
does not necessarily shut down any portion of the system. When performing
any service other than hot-plug module replacement, you must completely
disconnect all power to that portion of the system.
In the case of the server blade enclosures, shut off the circuit breakers to both
A and B power feeds and then disconnect both power feed cables before
servicing.
In the case of the power enclosures, shut off the circuit breakers to both A and
B power feeds and then disconnect both power cords from the wall outlet
before servicing.
WARNING: To reduce the risk of personal injury from hot surfaces, allow the
internal system components to cool before touching them.
2-6 HP ProLiant BL p-Class System Setup and Installation Guide
Planning the Installation
WARNING: The power enclosure and the server blade enclosure are very
heavy. To reduce the risk of personal injury or damage to the equipment:
• Observe local occupational health and safety requirements and guidelines
for manual material handling.
• Remove hot-plug power supplies and server blades from their enclosures
before installing or removing the enclosures.
• Use caution and get help to lift and stabilize enclosures during installation
or removal, especially when the enclosure is not fastened to the rack.
WARNING: To reduce the risk of personal injury or damage to the equipment,
you must adequately support the power enclosure and the server blade
enclosure during installation and removal. These enclosures are not secured
to the rack frame.
WARNING: Always use at least two people to lift an enclosure into the rack. If
the enclosure is being loaded into the rack above chest level, a third person
must assist with aligning the enclosure with the rails while the other two
people support the weight of the enclosure.
CAUTION: When performing non-hot-plug operations, you must power down the
server blade and/or the system. However, it may be necessary to leave the server
blade powered up when performing other operations, such as hot-plug installations
or troubleshooting.
CAUTION: Protect the equipment from AC power fluctuations and temporary
interruptions with a regulating facility UPS device. This device protects the hardware
from damage caused by power surges and voltage spikes and keeps the system in
operation during a power failure.
CAUTION: Always be sure that equipment is properly grounded before beginning
any installation procedure. Electrostatic discharge resulting from improper grounding
can damage electronic components. For more information, refer to Appendix B,
“Electrostatic Discharge.”
HP ProLiant BL p-Class System Setup and Installation Guide 2-7
3
Installing System Hardware
This chapter provides installation procedures for the following system infrastructure
components:
• Power enclosures
• Server blade enclosures
• Hot-plug power supplies
• Interconnects and their respective modules
• Bus bars
You can also refer to the installation procedures on the HP ProLiant BL p-Class
System Hardware Installation and Configuration poster.
Installing System Enclosures
To install a power enclosure or server blade enclosure, use the sections in this chapter
to complete the following steps:
1. Measure with the rack template.
2. Install the rack rails and cage nuts.
3. Load the enclosures into the rack.
HP ProLiant BL p-Class System Setup and Installation Guide 3-1
Installing System Hardware
Measuring with the Rack Template
Telco Rack Configurations
If you are installing components in a telco rack, refer to the telco rack template and
documentation that ship with the telco enclosure option kits.
Power Bus Box Configurations
If you are installing a power bus box configuration, refer to the power bus box rack
template and documentation that ship with the power bus box option kit.
Scalable and Mini Bus Bar Configurations
If you are installing a scalable or mini bus bar configuration, refer to the template and
documentation that ship with either option kit.
Installing the Rack Rails and Cage Nuts
You must install two rack rails to support each enclosure. Rack rails have the
following features:
• Adjustable depth of 60.96 cm to 91.44 cm (24 inches to 36 inches)
IMPORTANT: For proper bus bar installation and clearance, the rack rail depth must be
set from 73.66 cm to 76.20 cm (29 inches to 30 inches).
• Depth indicator, visible in the middle of the rail
• “L” and “R” markings to identify left and right rack rails (from the front of the
rack)
WARNING: To reduce the risk of personal injury and damage to the
equipment, always begin by mounting the heaviest item on the bottom of the
rack. Continue to populate the rack from the bottom to the top. Failure to do so
may make the rack unstable.
3-2 HP ProLiant BL p-Class System Setup and Installation Guide
Installing System Hardware
To install the rack rails and cage nuts:
1. Position yourself at the front of the rack.
2. Measure the depth of the rack.
3. Be sure that the rail locking gear is in the unlocked position (1).
4. Press the rail locking tab to unlock the rack rail (2).
5. Adjust the rack rail to the depth of the rack using the numbers on the rack rail as
a guide (3). The depth of a Compaq branded rack (29 inches) is clearly indicated
on the rack rails.
Figure 3-1: Unlocking and adjusting a rack rail
IMPORTANT: Numbers on the rack rail provide a gross adjustment of the depth of the
rack rail. You may need to adjust the rack rail depth again to ensure a proper fit.
6. Insert the rear of the right rack rail into the rack at the marks you made when
measuring with the template.
NOTE: The rack rails feature “L” and “R” markings to identify the left and right rack rails
(from the front of the rack).
HP ProLiant BL p-Class System Setup and Installation Guide 3-3
Installing System Hardware
Figure 3-2: Inserting the rear of the rack rail
7. Compress the spring-loaded rack rail toward the rear of the rack (1).
8. Using the marks you made when measuring with the template, align the front of
the right rail with the holes and release the rail, allowing it to lock into
position (2).
9. Engage the locking gear (3).
Figure 3-3: Inserting the front of the rack rail and
engaging the locking gear
3-4 HP ProLiant BL p-Class System Setup and Installation Guide
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