HP D5970A - NetServer - LCII User manual

HP NetServer LPr
Rack Cabling Reference
HP Part Number D6129-90005
Printed in October 1998

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Notice
The information contained in this document is subject to change without notice.
Hewlett-Packard makes no warranty of any kind with regard to this
material, including, but not limited to, the implied warranties of
merchantability and fitness for a particular purpose. Hewlett-Packard shall
not be liable for errors contained herein or for incidental or consequential
damages in connection with the furnishing, performance, or use of this material.
Hewlett-Packard assumes no responsibility for the use or reliability of its software
on equipment that is not furnished by Hewlett-Packard.
This document contains proprietary information that is protected by copyright.
All rights are reserved. No part of this document may be photocopied,
reproduced, or translated to another language without the prior written consent of
Hewlett-Packard Company.
Windows is a registered trademark of Microsoft in the U.S. and other countries.
Torx is a registered trademark of CamCar/Textron, Inc.
Hewlett-Packard Company
Network Server Division
Technical Marketing/MS 45S-LE
10955 Tantau Avenue
Cupertino, CA 95014 USA
© Copyright 1998, Hewlett-Packard Company.
Audience Assumptions
The guide is for the person who installs, administers, and troubleshoots LAN
servers. Hewlett-Packard Company assumes you are qualified in the servicing of
computer equipment and trained in recognizing hazards in products with
hazardous energy levels.

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Contents
1 About This Cabling Reference ....................................................................1
Introduction....................................................................................................1
Before You Use This Reference.................................................................1
Purpose of This Document.........................................................................1
Building an HP NetServer Rack.....................................................................2
Suggested Method for Building an HP NetServer Rack Installation............2
General Cabling Warnings and Cautions........................................................9
Unterminated Power Cords Require Licensed Electrician...........................9
Prevent Electric Shock...............................................................................9
Prevent Damage to Components.............................................................10
2 Connecting and Routing Cables to the HP NetServer LPr ......................11
Introduction..................................................................................................11
Overview of Cabling Steps.......................................................................11
The HP NetServer LPr.............................................................................11
Site Preparation...........................................................................................12
Site Preparation Checklist........................................................................12
Site Preparation: Circuit Breakers............................................................14
Cabling Preparation for the HP NetServer LPr.............................................15
Assess How Components Will Be Connected to the Server .....................15
Attach Cable Guide to Rack Column........................................................15
Mount Power Distribution Units................................................................15
Attach Data Cables......................................................................................26
Plan Data Connections ............................................................................26
Overview of Data Cabling the LPr............................................................26
Attach Data Cables to the Server.............................................................27
Attach Data Cables to Other Components................................................28
Using Multiple Console Switches..............................................................28
Attach Power Cables....................................................................................30
Attaching Server and Component Power Cables......................................30
Determining and Balancing Current Draw on Multiple
Circuits in One Rack................................................................................31
Power Cabling..............................................................................................33
100 - 120 VAC PDU Rack Power Configurations......................................33

Contents
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200/208V PDU Rack Power Configurations..............................................36
230/240V PDU Rack Power Configurations..............................................39
High Density Configurations.........................................................................42
120 VAC High Density Example...............................................................42
208 VAC High Density Example...............................................................44
Power Up the Components in the Rack........................................................46
Power Up Sequence ................................................................................46
Power Down Considerations ....................................................................46
3 Cabling Reference Information .................................................................47
Power Cords and Component Reference .....................................................47
Wide-Ranging PDU Configurations..............................................................48
Power and Current for Estimating Supply Needs..........................................50
Data Cabling Principles Used in Determining Rack Locations ......................53
Key Cabling Guidelines Used in Developing a Rack Layout.....................53
Placement Considerations Due to Data Cable Lengths ............................54
Cooling Requirements for the HP NetServer LPr..........................................55
A Specifications............................................................................................57
Weight and Dimensions...........................................................................57
Power ......................................................................................................57
Thermal...................................................................................................57
Index...............................................................................................................59

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1 About This Cabling Reference
Introduction
Before You Use This Reference
This cabling reference assumes:
• You have completed the rack assembly process.
• You have rack-mounted the HP NetServer LPr and other components.
• You are ready to cable the components in the rack.
For instructions on how to install the HP NetServer LPr in a rack, see Chapter 9
in the HP NetServer LPr Installation Guide.
NOTE For instructions on how to assemble other components of a
network system in a rack, please find and follow the
documentation shipped with those components. Look for this
documentation first inside the rack or the separately orderable
installation kit, or use the generic rack assembly process
described in this chapter.
Purpose of This Document
This reference provides information for cabling the HP NetServer LPr, including
power consumption and current requirements. It is written for rack installers who
have installed the HP NetServer LPr in a rack and need information about how to
connect data and power cables. It includes:
•Assessment of floor's flatness and strength
•A review of the generic steps for building a rack installation
•Site preparation information
•Illustrations of electrical power components
•Procedures for connecting data cables between the HP NetServer LPr and
other system components
•Illustrations for installing Power Distribution Units (PDU) in the rack

Chapter 1 About This Cabling Reference
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•Power cabling information for rack-mounted electronic components
•Power, current, and component reference information
Building an HP NetServer Rack
Suggested Method for Building an HP NetServer Rack Installation
1. Check Site Preparation
Use the Site Preparation Checklist in Chapter 2 of this reference to be sure that
all necessary preparations have been completed, including:
•Customer network and software responsibility met
• Site electrical power supply setup complete
• Environmental and space requirements met
•Precautions are taken to prevent access to the equipment by technically
unqualified personnel
•Data and voice communications pre-tested
•System parameters correctly configured
•Hardware and cables order checked
2. Find and Use Configuration Plans
Use the original ordering information to locate where each component goes in
the rack.
If the original ordering information is not available, use HP rack configuration
tools to plan the location of each component.
You can also use the HP NetServer rack configuration tools rack assistant to
make ordering easier and to automatically check that orders are complete. These
tools can be found on the HP web site with the URL:
http://www.hp.com/go/netserver

Chapter 1 About This Cabling Reference
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3. Verify Shipment and Unpack Server and Storage Unit
WARNING The LPr weighs about 40 pounds (18 kg.). Take appropriate
lifting precautions when moving it. Get help when removing
or replacing an LPr towards the top of a 2 meter rack.
Compare the order documents to the packing list or to a list of boxes received.
Check to see that all parts are present. Unpack the HP NetServer LPr and
external storage and tape backup units (if any were ordered).
NOTE Save the boxes and packaging materials if you intend to reship
the units and rack.
4. Prepare Rack Enclosures for Assembly
WARNING A tip-over hazard exists. Rack enclosures are shipped upright
and are top-heavy. Never move enclosures without adequate
equipment and assistance. Use caution to prevent the rack
from falling over and causing potential damage or injury.
Use the anti-tip foot in the rack base.
If you receive pre-configured units, follow assembly instructions from your
organization first, if you have them. Otherwise, continue with this set of
instructions.
Move Rack Enclosures and Other Units to Installation Location
WARNING Whenever you lift equipment, limit the amount of weight
each person picks up. Lift with your legs, not with your back.
Use two or more people and the proper equipment to move the rack enclosure,
server, mass storage units, and other components. Stage cartons a few feet from
your assembly and final power-up location.

Chapter 1 About This Cabling Reference
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Unpack Rack Enclosures and Hardware, and Remove the Shipping Panels, Doors, and
Side Panels (If applicable)
WARNING Use care in moving the rack down from the pallet. Three
people are required for this step.
1. Follow pictorial instructions on the shipping container to unbox the rack
enclosure.
2. Adjust the leveler feet under each of the four corners of each rack. Lower
each leveler foot to be in firm contact with the floor.
CAUTION The leveler feet prevent the rack from rolling away from you
when you install components. Be sure they have been lowered
before you put anything into the rack.
3. Find and extend the anti-tip foot at the front of the rack before you mount
any rack equipment on slides.
WARNING When equipment is mounted on sliding rails, a tip-over
hazard exists. Always take the precautions listed below:
Extend or bolt on the anti-tip foot for each rack before
mounting equipment on slides.
Never extend more than one piece of equipment on slides at
a time.
Reduce weight by removing power supplies and hard disk
modules from servers.
Always use the rack mounting handles that are shipped on
rack optimized units as shown in the accompanying
instructions.
4. Remove any shipping panels from inside the rack enclosure. Save panels,
screws, and rack nuts if you are going to reship the rack.

Chapter 1 About This Cabling Reference
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Unpack Remaining Components
Unpack each component in the order in which you assemble them (from the
bottom of the rack upward). Each package contains rack installation instructions
or a user guide.
NOTE If an Uninterruptible Power Supply (UPS) is included, plug it
in as soon as you unbox it. Doing so helps ensure batteries are
charged when rack installation is completed.
5. Build Basic Rack Assembly
Position, Tie Together, and Open Up the Rack
1. Determine how rack bays are to be positioned. If two or more racks are to
be tied together, use the optional tie-together kit. Otherwise skip this step.
Newer models may be attached, or tied together, before or after equipment
is mounted in them. Follow instructions included with tie together
hardware.
NOTE HP Rack System product numbers J1487B, J1487B option
AXH, and J1488A require that enclosures be attached, or tied
together, before any components are placed in them. To avoid
problems, if racks are to be tied together, do so before
installing units, rails, shelves, or other hardware. Otherwise,
you may have to remove components from the rack to gain
access to the tie-bolt locations.
2. If present, remove the front and rear doors to increase accessibility inside
the rack. Follow instructions shipped with the rack to do so.

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NOTE HP Rack System product numbers J1487B, J1487B option
AXH, and J1488A require door hardware to be in place before
mounting components. If you are using front or rear doors, be
sure the hinge and latch hardware is mounted before putting
on any other hardware. This prevents later disassembly.
WARNING When the back door of a rack is removed, the latch catch
bracket protrudes. To avoid injury, temporarily remove this
bracket prior to installing components into the rear of the
rack.
3. If present, remove side panels to allow better access. Follow instructions
shipped with the rack to do so.
Install Fans if Required and UPS First If You Have Them
1. If an extractor fan unit is to be used, install it following instructions which
accompany the unit.
NOTE The LPr has an internal fan system, so rack doors must be
perforated (front and/or rear). As longs as the doors are
perforated, an extractor fan panel is not necessary.
2. If an Uninterruptible Power Supply (UPS) is used, install the UPS
mounting rails and fasten the unit into place following instructions
which accompany it. Place UPS equipment in the lowest EIA Units of the
rack. Plug the UPS in to charge the batteries as soon as possible.
6. Mount Components in the Rack
Plan Component Locations
Use the original ordering information to locate where each component goes in
the rack.
If the original ordering information is not available, use HP rack configuration
tools to plan the location of each component.

Chapter 1 About This Cabling Reference
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You can also use the HP NetServer rack configuration tools (for instance, HP
Rack Assistant) to make ordering easier and to automatically check that orders
are complete. These tools can be found on the HP web site. Use a Web browser to
go to the following URL:
http://www.hp.com/go/netserver
Then use the Search function with the words: "rack configuration tools." Find
one of the following in the list of search responses: "Ordering NetServers,"
"Select a Configuration," "Configuration Software," or "Rack Assistant."
Mount Each Unit in the Rack Enclosure
1. Position each unit following the original layout used to order the server.
Follow the instructions which accompany each component. If you do not
have the original layout, you can use HP rack configuration tools,
available at HP's web site, to regenerate it.
2. Rack-optimized HP NetServer and mass storage unit have instructions in
their user guides for mounting the units in the rack enclosure. For other
servers and storage units, rack mounting instructions are included with
optional rack-mount kits, if available. See the user or installation guide
or rack-mount kit instruction sheet which accompanies your unit for
details.
CAUTION To prevent rack tip-over, extend or bolt on the anti-tip foot
before installing units on sliding members. Also prevent rack
tip-over by extending only one piece of equipment at a time
from the front or rear of the rack.
3. Begin at the bottom of the rack, installing the rack mount kit for the first
component. Install the UPS first, if you have one.
NOTE For both safety and accessibility, always start assembly at the
bottom of the rack and work upward.
4. Be sure to locate and place rack nuts along the front outside face of the
vertical column before placing each component on its rails or base. The
pre-positioning of rack nuts allows the front of the component to be
secured to the front of the rack. (Some units use threaded inserts or bar
nuts, and require no rack nuts to secure the unit to the rack.)
5. Mount each unit on its accompanying rails, brackets, or slides.

Chapter 1 About This Cabling Reference
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CAUTION Tip-over hazard exists. Servers are heavy and may be
awkward to position on their mounting rails. Therefore,
always minimize the weight to be mounted into the rack by
removing power supplies modules and hard disk modules
from the NetServer.
Once each component is correctly secured in the rack, add the front panel
(bezel) to the unit.
Proceed with units one by one, from the bottom of the rack to the top. Fill
any gaps with spacer panels.
7. Connect and Route Cables
NOTE Illustrated information about cabling the HP NetServer LPr in
the rack is available in Chapter 2 of this reference, which
describes the procedures for connecting and routing cables.
Generally, follow these steps to ensure cables are correctly connected and
managed:
Cable management preparation
•Determine which components will be connected to each server.
•Attach Cable Guides to the rack column. See instructions included with
Cable Guides.
•Mount Power Distribution Unit (PDU) or Units.
Attach data cables
•Plan where data connections are to be made.
•Attach data cables to the server. Mark the ends of data cables with colored
tie-wraps and labels that come along with each server. This simplifies the
attaching of cables later in the procedure.
•Attach data cables to their respective components.

Chapter 1 About This Cabling Reference
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Attach power cables
•Connect each component to a Power Distribution Unit (PDU) or Units.
•Connect PDU cables to Uninterruptible Power Supply (UPS) and UPS
cables to Branch Circuits--if present.
Route and secure cables
•Route cables through Cable Guide and tie them in place.
Power on the components in the rack.
•Follow the power up sequence. See "Power Up Sequence" in Chapter 2.
8. Configure the System, Install Doors and Side Panels
At this point, refer to the HP NetServer LPr Installation Guide and configure the
system.
Install front and rear doors as required, and mount side panels. Detailed
instructions and illustrations are included with the rack enclosure and
components.
General Cabling Warnings and Cautions
Unterminated Power Cords Require Licensed Electrician
In some cases in the 230/240V environment, the Uninterruptible Power Supply
(UPS) is shipped with a power cord that is unterminated (that is, there is no
power connector, just wires). The reason is that the current demand of a fully
loaded rack may exceed the demand for the normal circuit in some countries.
Therefore, you should have a qualified electrician or electrical engineer analyze
the current demand for each branch circuit used by rack mounted equipment.
Proper wiring and cord termination are part of the same process.
Prevent Electric Shock
WARNING The LPr must be installed only in locations where access is
restricted to technically qualified personnel.

Chapter 1 About This Cabling Reference
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WARNING Ensure site electrical circuits have reliable earth grounding.
Never operate products in any rack enclosure with the ground
connector disconnected. Although leakage current from any
one device may be minimal, cumulative leakage current of
equipment mounted in a rack may exceed 5mA, and could
reach 15mA. This level of current can be dangerous, unless a
reliable earth ground is in place. Thus, reliable ground
circuit continuity is vital to safe operation of this system.
WARNING Prevent shock by disconnecting power and telephone cords
when you service or install components.
Prevent Damage to Components
CAUTION Rack optimized products are sensitive to static electricity
(ESD). When installing components, take precautions against
ESD damage. Wear a wrist-strap and use a static-dissipating
work surface connected to the server chassis when handling
printed circuit boards, memory devices, and processor chips
or modules. Ensure that the metal of the wrist-strap contacts
your skin and that the alligator clip is attached to a static-
neutral surface.
CAUTION Power up the components one at a time as recommended in
the section titled "Power Up Sequence" to minimize current
inrush.

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2 Connecting and Routing Cables to
the HP NetServer LPr
Introduction
Overview of Cabling Steps
This chapter includes information on cabling the server and other components in
a rack, including how to:
• do site preparation
• prepare for cabling data and power
• attach data cables
• attach power cables
• route cables
• power on the equipment in the rack
The HP NetServer LPr
The HP NetServer LPr offers mid-range server capabilities in an enclosure only
two EIA units (2 U) high.

Chapter 2 Connecting and Routing Cables to the HP NetServer LPr
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Figure 2-1. The HP NetServer LPr
Site Preparation
You may want to copy and use the site preparation checklist.
Site Preparation Checklist
Table 2-1. Site Preparation Checklist
HP NetServer Customer Responsibilities
Logical and physical network design provided
Server configuration parameters determined
Disk partition and directory structure determined
Required incoming power and data cabling in place
Working LAN, one working client, one working printer available, (if integrating into an
existing network)
Software license requirements met
Networking peripherals connected

Chapter 2 Connecting and Routing Cables to the HP NetServer LPr
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Floor
Ensure the floor where the NetServer rack is to be installed is level.
Assess floor strength and ensure it is sufficient to support the type of rack you have
ordered. (See the rack documentation included with your rack.)
Ensure sufficient area to accommodate your rack, including up to 24 inches (61 cm) rear
door clearance.
Power
Correct size, type, and rating of receptacles, circuits, and circuit breakers; see the section
titled "Site Preparation: Circuit Breakers."
Locate close enough to power sources so that power cords will reach
If raised floor, need floor tile(s) with a cutout for cables, all posts electrically grounded
Facility for grounding each rack to earth connection, ensure earth ground continuity for
circuits to be used for rack mounted equipment
Environmental and Space Requirements
Must meet OSHA and HP specifications for safety and supportability (3 feet minimum
access in front and rear of cabinets)
Side access of 24 inches improves cable routing and management
24 hour air conditioning (68 - 72 F, 40 - 60% RH)
Table or work space big enough for console terminal and user guides
Bookshelf for documentation
Area to store equipment until time of installation
Ensure all equipment and/or shipping pallets can fit through doorways, hallways, and into
and out of elevators
Security
The LPr must be installed only in locations where access is restricted to technically
qualified personnel.
Use the lock on the rack to secure the LPr control panels.
Data and Voice Communications (Pre-Tested and Verified)
Voice phone located at system console terminal with cord long enough to reach all parts of
the rack installation
Phone line for remote support at each system
Ethernet, FDDI, Token Ring, or other standard

Chapter 2 Connecting and Routing Cables to the HP NetServer LPr
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System Parameters
Hostname
IP address
Subnet Mask
Gateway IP Address
Gateway Host Name
DTC Node Name
Hardware Configuration, Cables, and Additional Devices
Availability of I/O paths and SCSI addresses for add-on devices
Availability of I/O backplane slots, memory slots, and so on
Valid, supportable configuration for added devices, interfaces, memory, and so forth
Correct type and length of cables, as specified in order documents
Site Preparation: Circuit Breakers
When you connect the HP NetServer LPr to an AC power source, the server
temporarily draws a large "inrush current." This occurs even when the system is
in standby mode. Inrush current is much greater than the server's normal
operating needs. Generally, your external AC power source can handle the inrush
current.
If you install several HP NetServers on one circuit, however, precautions are
necessary. If there is a power failure and power is then restored, for instance, all
the servers immediately begin to draw inrush current at the same time. If the
circuit breakers on the incoming power line have insufficient capability, they may
trip and thus prevent the servers from powering up. See Appendix A,
"Specifications," for power requirements.
When preparing your site for installation, allow for the additional inrush current.
Consider the following before installing the server in your environment:
•In North America, a 20-amp-minimum circuit is to be used with one
NEMA AB1 class 14B breaker for each 16-amp Power Distribution Unit
that is to be connected to an HP NetServer LPr.
•In Europe:
◊For a single LPr unit in a rack, use a 16-amp-minimum circuit with
one IEC MCB C-type breaker for each 16-amp Power Distribution
Unit.

Chapter 2 Connecting and Routing Cables to the HP NetServer LPr
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◊ For multiple LPr units in a rack, use a 16-amp-minimum circuit with
one IEC MCB D-type breaker for each 16-amp Power Distribution
Unit.
NOTE Some local codes do not allow a 16-amp device to be
connected to a 16-amp service. Consult a qualified electrician
or local regulatory authority before beginning electrical site
preparation.
Cabling Preparation for the HP NetServer LPr
Assess How Components Will Be Connected to the Server
You may find the following steps to be helpful before you begin cabling:
•Review the layout of the rack installation generated with HP's rack
configuration tools. (See Step 2 in Chapter 1 for more information.)
•Consider the cabling guidelines discussed in Chapter 3, in the section
"Data Cabling Principles Used in Determining Rack Locations."
Attach Cable Guide to Rack Column
Using the instructions included with the Cable Guide hardware, attach the Cable
Guide(s) to the rack column.
Mount Power Distribution Units
Plan the location of the Power Distribution Unit or Units (PDU) by reference to
amperage, power, and the number of receptacles. For additional information on
PDUs see Chapter 3, the section titled "Wide-Ranging PDU Configurations."
The following subsections describe the types of PDU's and three ways to mount
them:
◊Horizontally on the rear columns of the rack.
◊Vertically on the rear columns of the rack.
◊Horizontally on extended rear brackets for the LPr.

Chapter 2 Connecting and Routing Cables to the HP NetServer LPr
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Three Types of Power Distribution Unit
The three types of Power Distribution Units (PDUs) currently supplied are shown
in Figure 2-2:
◊The 100/120 VAC PDU (HP product number E7675A) is designed to
fit horizontally between the columns of the rack, but can also be
mounted vertically along the outside edge of the vertical column. See
Figure 2-4. This PDU is supplied as a 16-amp unit with nine available
NEMA 5-15R receptacles and one IEC 320 C13 fan receptacle.
◊The wide-ranging 208/240 VAC PDU (HP product number E7671A)
is designed to fit horizontally between the columns of the rack, but can
also be mounted vertically along the outside edge of the vertical
column. This PDU is rated 16 amps and has six available C13
receptacles and two 19 receptacles.
◊A wide-ranging 208/240 VAC configuration 10-amp extension (HP
product number E7670A) is available to be plugged into the 16-amp
unit to extend the number of C13 receptacles by an additional 10 (HP
product number E7672A when 10 amp, 16 amp, and jumper cord are
ordered together). This accessory also allows positioning of receptacles
at various levels in the rack. (To order the 16-amp unit with its 10-
amp extension and jumper cable, order HP part number E7672A.).