HP 10842 Reference Manual
HP 10842 Rack
Reference Guide
December 2002 (Second Edition)
Part Number 284358-002
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 10842 Rack Reference Guide
December 2002 (Second Edition)
Part Number 284358-002
Contents
About This Guide
Important Safety Information ...........................................................................................vii
Symbols on Equipment..................................................................................................... vii
Rack Stability..................................................................................................................... ix
Symbols in Text.................................................................................................................ix
Getting Help........................................................................................................................ x
Technical Support ........................................................................................................ x
HP Website................................................................................................................... x
Authorized Reseller..................................................................................................... xi
Reader’s Comments........................................................................................................... xi
Chapter 1
Overview
HP 10842 Rack................................................................................................................ 1-1
Rack Options ...................................................................................................................1-3
Delivery Considerations ..................................................................................................1-5
Installation Sequence Summary.......................................................................................1-5
Installation Service ..........................................................................................................1-6
HP 10842 Rack Reference Guide iii
Contents
Chapter 2
Configuration Factors
Rack Configuration Software.......................................................................................... 2-1
Rack Builder Online Modes of Operation ................................................................ 2-1
Rack Builder Online Features................................................................................... 2-2
Rules for Component Placement..................................................................................... 2-3
Additional Considerations............................................................................................... 2-3
Optimum Environment.................................................................................................... 2-5
Space Requirements.................................................................................................. 2-5
Power Requirements................................................................................................. 2-5
Grounding Requirements.......................................................................................... 2-6
Temperature Requirements....................................................................................... 2-7
Airflow Requirements .............................................................................................. 2-8
Chapter 3
Preparing the Rack
Required Tools................................................................................................................ 3-2
Checking the Hardware................................................................................................... 3-2
Removing the Rack Doors .............................................................................................. 3-3
Removing the Side Panels............................................................................................... 3-7
Stabilizing the Rack ........................................................................................................ 3-8
Standalone Racks...................................................................................................... 3-8
Multiple Racks........................................................................................................ 3-10
Server/Storage vs. Switching Configurations ............................................................... 3-10
Chapter 4
Installing Components in the Rack
General Guidelines.......................................................................................................... 4-2
Component Installation Overview .................................................................................. 4-3
Using the Template ......................................................................................................... 4-4
Installing the Cage Nuts.................................................................................................. 4-5
Preparing and Installing Rack-Mountable Rails ............................................................. 4-6
Preparing the Adjustable Fixed Rails ....................................................................... 4-6
Installing the Adjustable Fixed Rails........................................................................ 4-7
Preparing the Sliding Rails....................................................................................... 4-9
Installing the Sliding Rails...................................................................................... 4-13
Preparing the Component.............................................................................................. 4-14
Adjustable Fixed Rails............................................................................................ 4-14
iv HP 10842 Rack Reference Guide
Sliding Rails............................................................................................................ 4-15
Cable Management Arm Bracket............................................................................ 4-16
Installing the Components into the Rack.......................................................................4-17
Installing a Component into a Rack with Adjustable Fixed Rails...........................4-17
Installing a Component into a Rack with Sliding Rails ..........................................4-17
Installing the Cable Management Arm ...................................................................4-19
Connecting the Cables and Power Cord.................................................................. 4-21
Routing the Cables.........................................................................................................4-22
Chapter 5
Specifications
Appendix A
Electrostatic Discharge
Grounding Methods........................................................................................................ A-2
Appendix B
Transportation Instructions
Transportation Methods.................................................................................................. B-1
Air Transport............................................................................................................ B-1
Land Transport......................................................................................................... B-2
Sea Transport ........................................................................................................... B-2
Delivery Services............................................................................................................ B-2
Inside Rack Delivery Service................................................................................... B-2
Expedited Rack Delivery Service ............................................................................ B-3
Shipping/Delivery Considerations ........................................................................... B-4
Contents
Index
HP 10842 Rack Reference Guide v
This guide provides step-by-step instructions for installation and reference
information for operation for the HP 10842 Rack.
Important Safety Information
Before installing this product, read the Important Safety Information document
included with the server.
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 your documentation for specific details.
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.
About This Guide
HP 10842 Rack Reference Guide vii
About This Guide
Weight in kg
Weight in lb
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 10842 Rack Reference 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.
• Only one component is extended at a time. A rack may become unstable if
more than one component is extended for any reason.
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.
About This Guide
CAUTION: Text set off in this manner indicates that failure to follow directions could
result in damage to equipment or loss of information.
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 10842 Rack Reference Guide ix
About This Guide
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)
• Product serial number
• Product model name and number
• Applicable error messages
www.hp.com.
• 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
x HP 10842 Rack Reference Guide
www.hp.com.
Authorized Reseller
For the name of your nearest authorized reseller:
• In the United States, call 1-800-345-1518.
• In Canada, call 1-800-263-5868.
• Elsewhere, see the HP website for locations and telephone numbers.
Reader’s Comments
HP welcomes your comments on this guide. Please send your comments and
suggestions by e-mail to
ServerDocumentation@hp.com.
About This Guide
HP 10842 Rack Reference Guide xi
As computer systems have evolved in size and complexity, managing them has
become a critical concern. By centralizing your equipment in a HP 10000 Series rack,
the efficiency and accessibility of your system can be increased dramatically.
The 10000 Series racks are designed to house rack-mountable products on industrystandard 19-inch (48.26-cm) wide rails. Using rack-mountable products allows you to
decrease the footprint required to house your existing hardware while still providing
expansion capability.
Racks and rack-mountable components are typically described using
U measurements. For example, one U is 44.45 mm (1.75 inches) high.
HP 10842 Rack
The HP 10842 rack is a 800 x 1000 mm 42U rack that arrives in a server/storage
configuration with internal mounting rails that are front justified, allowing the
customer room in the rear of the rack for cable routing.
1
Overview
The 10842 rack offers the following features:
• Perforated front door, solid side panels (optional), and split rear perforated doors
• Cable access panel that allows routing and cable management
• Perforated rack top with egress slot
HP 10842 Rack Reference Guide 1-1
Overview
• Interchangeable front and rear doors that allow the rack to be used in
server/storage or switching applications
NOTE: Customers wanting to utilize the 10842 rack exclusively for switching devices,
such as routers and switches, have two options:
• Interchange the front and rear doors to make use of the mounting rail front
justification, allowing room in the front of the rack for cabling.
• Move the front vertical rails back allowing the switching devices to be mounted on
both front and rear sets of internal mounting rails.
Figure 1-1: 10842 rack
Figure 1-2: Dual-opening perforated rear doors
1-2 HP 10842 Rack Reference Guide
Rack Options
In addition to the standard rack, HP also provides rack options to complement or to
complete your rack solution. The following list is only a sampling of the many rack
option kits available. For more information, refer to the HP website,
Table 1-1: Rack Options
Option Description
Side Panels Rack Option Kit Provides enclosures for the sides of
Stabilizer Rack Option Kit Increases the stability of free-
Ballast Option Kit Provides rack stability when heavy
Rack Option Baying Kit Joins multiple racks of the same
Rack Option Offset Baying Kit Joins multiple racks of different
Fan (110V/220V) Rack Option Kit Enhances natural convection
Ground Bonding Rack Option Kit Reduces electromagnetic emissions
Monitor/Utility Shelf Rack Option Kit Holds a monitor or other rack
Server Console Switch Kit Provides a programmable switch
Networking Cable and Recessed
Rail Management Kits
Overview
www.hp.com.
the rack
standing racks
equipment is installed, removed, or
accessed within the rack
series, height, and depth
series with the same height but
different depths
cooling by increasing the airflow in
the rack
that may be given off by electric
components operating within the
rack
components
panel with connection hardware
used to switch a keyboard, monitor,
and mouse among multiple servers
Routes and organizes cables within
the rack
continued
HP 10842 Rack Reference Guide 1-3
Overview
Table 1-1: Rack Options continued
Option Description
Cable Management D-Ring Rack
Option Kit
25-inch Rail Adapter Option Kit Allows the inner rack rails to
1U Keyboard Drawer Option Kit Holds and conceals a keyboard
100 Kilo Sliding Shelf Rack Option
Kit
TFT5600 Rackmount Keyboard and
Monitor (RKM) Kit
TFT5000R Flat Panel Monitor
Rackmount Kit
Depth Adjustable Fixed Rail Kit Provides rails that can be adjusted
Shock Pallet Spares Kit Transports configured racks
Rack Door Cushion Spares Kit Provides padding between the rack
Helps with cable management
accommodate third-party rack
options
Allows easy access to various rack
components
Rack-mountable 1U keyboard and
flat panel monitor on a drawer with
room in the rear to add a switchbox
Rack-mountable 2U flat panel
monitor
to various depths
unit and its front and rear doors
HP also offers several rack-mountable power products. For complete information
about these products, see the HP website,
www.hp.com.
Contact the nearest HP authorized reseller or service provider for information about
ordering rack option kits. For the name of the nearest HP authorized reseller, refer to
“About This Guide.”
1-4 HP 10842 Rack Reference Guide
Delivery Considerations
The following list is only a sampling of the many delivery considerations available.
For more information, visit the Best Practices Web page at
When preparing to receive palletized racks, consider the following:
• The dock door at the receiving site has to accommodate the height and width of
palletized racks.
IMPORTANT: The 42U-palletized rack is approximately 216.87 cm (85.38 inches) high
and does not fit through a standard-height door.
• Do not lay a rack on its side, because the sheet metal can become distorted.
• Transport a rack as far into the building as possible while it is still on the pallet.
Ideally, move the palletized rack to its final destination before removing the rack
from the pallet, or removing any of the packaging.
Installation Sequence Summary
Overview
www.hp.com.
The following is a recommended sequence of events for the most efficient
installation of your rack and components.
1. Download the Rack Builder Online software from the HP website and install it
on your system. Using the Rack Builder Online software, plan the rack
component location and installation sequence.
2. Select a location to set up your rack. This location should be as close as possible
to the permanent site for your rack.
3. Remove the packaging from the rack and verify the hardware contents.
4. Remove any doors and panels from the rack to provide easy access.
5. Stabilize the rack.
6. Bay multiple racks together.
7. Install products such as Power Distribution Units (PDUs) or switch boxes in
sidewall locations.
HP 10842 Rack Reference Guide 1-5
Overview
8. Install products such as Uninterruptible Power System (UPS) units starting from
the bottom of the rack.
9. Install the appropriate support rails and/or tray for the first rack-mountable
component.
10. Install the first individual component.
11. Attach a cable management arm, if required.
12. Attach the appropriate cables and power cords to the component, being sure to
adhere to all cautions and warnings.
13. Install the remaining components in the appropriate sequence.
14. Reinstall any doors and panels.
15. Power up and configure the system.
Installation Service
In the United States, HP can make arrangements to have your rack system installed
by qualified guaranteed service providers. This installation service covers the entire
hardware installation sequence, from unpacking the components to cable routing and
running a test of the system. For more information on HP support, refer to “About
This Guide.”
1-6 HP 10842 Rack Reference Guide
Configuration Factors
Before populating your new rack, it is important to plan the placement of each
component. Factors of each component, such as weight, accessibility, power,
temperature, and airflow requirements, affect installation order and component
placement in the rack.
Rack Configuration Software
To help you plan your rack configuration more efficiently, HP provides Rack Builder
Online, the browser-based rack configuration tool. The latest version of the software
is available at
Rack Builder Online Modes of Operation
The Rack Builder Online software has two modes of operation:
www.hp.com.
2
• Help Me Build It Mode—Includes a simple interview session to help determine
your rack and component needs, as well as the necessary power products and
rack assembly devices needed to complete the final rack assembly
• Let Me Build It Mode—Lets you select the individual devices that are required
for your configuration
HP 10842 Rack Reference Guide 2-1
Configuration Factors
Rack Builder Online Features
The Rack Builder Online software offers the following features.
• Multiple-Rack Configuration—Allows up to six racks to be viewed and
configured onscreen in one session
• Graphics—Uses graphical representations of the systems to illustrate the U
height that each component occupies
• Labeling—Aids in rack maintenance and configuration by allowing individual
racks and components within a rack to be labeled
• Drag & Drop—Allows the graphics of devices in a multiple-rack configuration
to be dragged and dropped between racks
• Reports—Provides reports on rack configuration labeling and rack suite graphics
for configurations that include multiple racks
• Third-Party Support—Allows you to define and add third-party products
If you are planning a new rack, use Rack Builder Online to view your rack as you
build it. Then print out a report and use it as your shopping list. After your rack
configuration is in place, use Rack Builder Online to assist you in maintenance and
upgrades.
Refer to the documentation accompanying Rack Builder Online for installation and
use of the software features.
2-2 HP 10842 Rack Reference Guide
Rules for Component Placement
The following rules apply to the physical placement of components in the rack.
• Weight—Sort all components by weight, placing the heaviest components at the
bottom of the rack.
• Balance—Be sure to balance the weight load between racks, placing the heaviest
components at the bottom. For example, if you have several UPS units and
several servers, do not put all of the UPS units into one rack—distribute them
evenly in the bottom positions of each rack.
• Server Console Switch—Position the switch box on the side of the rack above
the keyboard, or mount it behind the keyboard.
• CRT Monitor—Position the monitor topmost within the rack.
• Rack Mountable Flat Panel Monitor—Select a position to accommodate the
desired viewing height (a minimum of 4Us above the keyboard tray).
Additional Considerations
Configuration Factors
The following are additional items to consider, based on your specific rack
configuration.
• Power—If a UPS is installed, do not exceed its output rating. Be sure to review
the installation instructions provided with each component for important cautions
and warnings.
• PDUs—Install PDUs before installing other components.
• Height—The height of the rack and of rack-mountable components is measured
in U increments. When you are configuring your rack installation, remember that
the total U measurement of the components you want to install cannot exceed the
stated U height of the rack.
• Keyboard—The rack keyboard requires prior installation of a 1U Keyboard
Drawer Rack Option Kit.
HP 10842 Rack Reference Guide 2-3
Configuration Factors
• Monitor—The monitor requires installation of a Monitor/Utility Shelf Rack
Option Kit unless you are using a rack-mountable flat panel monitor.
• Server Console Switch—If a switch box is configured, use the CPU-to-Switch
cable included with the server. The standard distance between the switch box and
the keyboard, monitor, and/or mouse can vary by 3-, 7-, 12-, 20- and 40-foot
(91.44-, 213.36-, 365.76-, 609.6-, and 1219.2-cm) lengths. Optional Plenumrated KVM cables are available in 20- and 40-foot (609.6- and 1219.2-cm)
lengths.
NOTE: National Electrical Regulations governing the installation of building wiring require
that an appropriate cable, meeting fire-safety standards, be used any time cabling is
routed:
• Through an overhead drop-ceiling
• Under a computer room’s raised flooring
• From room to room
• From floor to floor
Be sure that the cable jacket or sleeving is made of material that does not burn easily and
does not exude toxic fumes when exposed to heat. Be sure that the cable you have
selected is appropriate for your installation site. If you require U.S. plenum-rated (CL2P)
cable, please contact your local HP authorized reseller to obtain the following options:
• 149363-B21—20-foot (609.6-cm) plenum cable
• 149364-B21—40-foot (1219.2-cm) plenum cable
• Rack Option Baying Kit—The number of baying kits needed to join a series of
racks is one less than the number of racks in the suite.
• Rack Option Offset Baying Kit—This kit joins multiple racks of different
series with the same height but different depths.
• Sidewall Panels—Only one set of sidewall panels is required for each row of
bayed racks.
• Stabilizing Feet—A stand-alone rack requires stabilizing feet.
2-4 HP 10842 Rack Reference Guide
Optimum Environment
Specific requirements for space, power, temperature, and airflow must be met to
provide optimum performance with minimum maintenance for your rack
environment.
Space Requirements
When deciding where to place your rack:
• At least 122 cm (48 inches) of clearance is needed all the way around the pallet
and above the rack to allow the removal of packing materials.
• At least 86 cm (34 inches) of clearance is needed in front of the rack to allow the
door to open all the way.
• At least 75 cm (30 inches) of clearance is needed in the rear of the rack to
provide access to components.
• At least 38 cm (15 inches) of clearance is needed around a power supply to
facilitate servicing.
Configuration Factors
Power Requirements
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 wiring and installation requirements.
When planning for power distribution requirements for your rack configuration:
• The power load must be balanced between available AC supply branch circuits.
• The overall system AC current load must not exceed 80 percent of the branch
circuit AC current rating.
• If a UPS is used, the load should not exceed 80 percent of the marked electrical
current rating of the UPS.
HP 10842 Rack Reference Guide 2-5
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