HP D5970A - NetServer - LCII User manual

HP NetServer LC 2000r
Rack Cabling Reference Guide
HP Part Number D8514-90008
Printed November 1999

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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.
APC®is a registered trademark of American Power Conversion Corporation.
Hewlett-Packard Company
Network Server Division
Technical Communications/MS 45SLE
19055 Tantau Avenue
Cupertino, CA 95014 USA
© Copyright 1999, 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 following areas:
•you are qualified in the servicing of computer equipment
•you are trained in recognizing hazards in products with hazardous energy
levels
•you are familiar with weight and stability precautions for rack installation

iii
Contents
1 Preparation for Cabling the NetServer LC 2000r........................................ 1
About Cabling the LC 2000r........................................................................... 1
Before You Use this
Reference Guide ....................................................... 1
The HP NetServer LC 2000r...................................................................... 1
Site Preparation............................................................................................. 2
Site Preparation Checklist.......................................................................... 3
Site Preparation -- Circuit Breakers............................................................ 4
Rack Assembly and Cabling Cautions and Warnings..................................... 5
Unterminated Power Cords Require Licensed Electrician........................... 5
Prevent Electrical Shock............................................................................ 6
Prevent Damage to Components............................................................... 6
Generic Rack Assembly Steps....................................................................... 7
Suggested Method for Building an HP NetServer Rack Installation ............ 7
2 Rack Cabling References.......................................................................... 15
Rack Configuration Tools............................................................................. 15
Power Cabling References and Guidelines.................................................. 15
Power Considerations for the HP NetServer LC 2000r............................. 15
Power Cables and Components Available ............................................... 16
Power Distribution Units .......................................................................... 19
Guidelines for Powering the LC 2000r in a Rack...................................... 23
Power and Current for Estimating Supply Needs...................................... 24
Data Cabling References and Guidelines..................................................... 29
Key Cabling Guidelines Used in Developing a Rack Layout..................... 29
Cable Guide Placement Considerations Due to Data Cable Lengths........ 29
Cooling Requirements for the LC 2000r....................................................... 30
3 Procedure for Connecting and Routing Cables to the LC 2000r............. 31
Step 1: Prepare to Cable the HP NetServer LC 2000r.................................. 31
Assess How Components Will be Connected to the Server...................... 31
Attach Cable Guide to Rack Column........................................................ 31
Mount the Cable Management Arm ......................................................... 31
Mount Power Distribution Units................................................................ 32
Step 2: Connect the LC 2000r Data Cables to Peripheral Components ........ 32
Plan Data Connections............................................................................ 32

Contents
iv
Overview of LC 2000r Data Connections ................................................. 32
Attach Data Cables to the Server............................................................. 34
Attach Data Cables to Other Components ............................................... 34
Step 3: Cable the LC 2000r for Power.......................................................... 34
Attaching Server and Component Power Cables...................................... 35
Determining and Balancing Current Draw on Two Circuits in One Rack... 35
100/120 VAC Rack Power Configurations................................................ 37
208V PDU Rack Power Configurations.................................................... 40
230/240V PDU Rack Power Configurations ............................................. 42
Redundant Power Configuration.............................................................. 45
High Density Configuration...................................................................... 46
Step 4: Managing and Routing Cables......................................................... 47
Using the Cable Management Arm and the Cable Guides........................ 47
Route and Tie Cables into the Management Arm..................................... 47
Step 5: Powering Up and Powering Down the Components in the Rack....... 50
Power Up Sequence................................................................................ 50
Power Down Considerations.................................................................... 50
A Cabling Checklist ...................................................................................... 51
B Considerations in Mounting the Redundant Switch ................................ 53
Index............................................................................................................... 57

1
1 Preparation for Cabling the
NetServer LC 2000r
About Cabling the LC 2000r
NOTE A checklist for the cabling process is included in Appendix A.
Before You Use this Reference Guide
This Cabling Reference Guide assumes that you have the rack assembly process
completed, have mounted the HP NetServer LC 2000r, and are ready to cable the
components in the rack enclosure.
If you want a high-level checklist to use in this process, see Appendix A.
For instructions on how to install the HP NetServer LC 2000r in a rack, consult
the Installation Road Map shipped with your rack or the Installation Guide
shipped with your NetServer unit.
NOTE For instructions on how to assemble other components in a
rack, please find and follow the documentation shipped with
your rack components. If there is no such documentation with
your rack and components, check the separately orderable
installation kit. Or, use the generic rack assembly process
described in this chapter.
The HP NetServer LC 2000r
This cabling reference is for the rack optimized HP NetServer LC 2000r shown in
Figure 1-1.

Chapter 1 Preparation for Cabling the HP NetServer LC 2000r
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Figure 1-1. The HP NetServer LC 2000r
Site Preparation
You may want to copy and use the site preparation checklist in this section
(Table 1-1). Doing so before you begin to install and cable the NetServer may
reveal actions you can take to support your success. Also be sure to read the
section on site preparation of circuit breakers.

Chapter 1 Preparation for Cabling the HP NetServer LC 2000r
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Site Preparation Checklist
Table 1-1. Site Preparation Checklist
HP NetServer General Guidelines
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 integratinginto an
existing network)
Software license requirements met
Networking peripherals connected
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 (600 mm) rear
door clearance and 36 inches (900 mm) front door clearance.
Power
Correct size, type, and rating of receptacles, circuits, and circuit breakers; see the section
entitled “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 to ensure earth ground continuity for
circuits to be used for rack mounted equipment

Chapter 1 Preparation for Cabling the HP NetServer LC 2000r
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Table 1-1. Site Preparation Checklist (Continued)
Environment and Space Requirements
Must meet OSHA, local code, and HP specifications for safety and supportability (3 feet
minimum access in front and rear of electrical cabinets)
Side access of 24 inches improves cable routing and management
Optimal: 24 hour air conditioning (68 - 72 deg. F; 20 - 22 deg. C, 40 - 60% RH)
Minimum: Maintain temperature inside NetServer enclosure between 41 and 95 deg. F,
5 - 35 deg. C
Enough table or work space 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
Data & 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 network connection standard
System Parameters
Hostname
IP address
Subnet Mask
Gateway IP Address
Gateway Host Name
DTC Node Name
Hardware Configuration, Cables, and Other Equipment
Availability of I/O paths and SCSI addresses for add-on devices
Availability of I/O backplane slots, memory slots, etc.
Valid, supportable configuration for added devices, interfaces, memory, etc.
Correct type and length of cables, as specified in order documents
Site Preparation -- Circuit Breakers
When you connect the HP NetServer LC 2000r to an AC power source, the server
temporarily draws a large “inrush current.” This occurs even when the system is in

Chapter 1 Preparation for Cabling the HP NetServer LC 2000r
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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.
However, if you install several HP NetServers on one circuit, precautions are
necessary. For instance, if there is a power failure and power is then restored 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.
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 LC 2000r.
•In Europe:
◊For a single LC 2000r unit in a rack, use a 16-amp-minimum circuit
with one IEC MCB C-type breaker for each 16-amp Power Distribution
Unit.
◊For multiple LC 2000r 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.
Rack Assembly and Cabling Cautions and
Warnings
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. The reason is that the
current demand of a fully loaded rack may exceed the demand for the normal
circuit in some countries. Therefore, HP recommends that you 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.

Chapter 1 Preparation for Cabling the HP NetServer LC 2000r
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Prevent Electrical Shock
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 hazard 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. Turning on an entire
rack at one time may create damaging and dangerous
electrical surges that could trip circuit breakers in the system.
Follow instructions in the section entitled “Power Up
Sequence” at the end of Chapter 3 to minimize current inrush.

Chapter 1 Preparation for Cabling the HP NetServer LC 2000r
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Generic Rack Assembly Steps
Suggested Method for Building an HP NetServer Rack Installation
1. Check Site Preparation
Use the Site Preparation Checklist in this chapter to be sure that all necessary
preparations have been completed, including:
•floor assessed for levelness and sufficient strength and space
•network and software guidelines met
•site electrical power supply set-up complete
•environmental and space requirements met
•data and voice communications pre-tested
•system parameters correctly configured
•hardware and cables order checked
2. Receiving
CAUTION Units are heavy, often weighing between 85 and 180 lbs. (50
and 110 kg). Do not attempt to move or install such units
without help. Also, remove power supplies and hard disk
drives to minimize the amount of weight to be lifted.
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 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.

Chapter 1 Preparation for Cabling the HP NetServer LC 2000r
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3. 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 rack from
falling over and causing potential damage or injury.
If you receive pre-configured units, follow assembly instructions from the
supplying organization first, if you have them. Otherwise, continue with this set of
instructions.
4. 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.
5. Unpack Rack Enclosures and Hardware, Use Anti-Tip Measures, and Remove
the Shipping Panels
WARNING Use care in moving the rack down from the pallet. Three
people are required for this step.
1. Follow any pictorial instructions on the outside of the shipping container to
unbox the rack enclosure.
2. Adjust the leveler screws, when present, under each of the four corners of
each rack. Lower each leveler screw to be in firm contact with the floor.
CAUTION The leveler screws prevent the rack from rolling away when
you install components. Be sure to lower these screws before
you put anything into the rack.
3. Find and extend the anti-tip foot under the rack (or bolt on the anti-tip
mechanism, if included) before you mount any rack equipment on slides.

Chapter 1 Preparation for Cabling the HP NetServer LC 2000r
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WARNING When equipment is mounted on slides, 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 slide-mounted
equipment at a time.
•Reduce weight by removing power supplies.
•Always use the rack mounting handles that are shipped on
rack optimized units as shown in accompanying instructions.
4. Remove shipping panels, if present, from inside the rack enclosure. Save
panels, screws, and rack nuts if you are going to reship the rack.
6. 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.
7. 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 tied together before or after equipment is mounted
in them. Follow instructions included with tie-together hardware.

Chapter 1 Preparation for Cabling the HP NetServer LC 2000r
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NOTE Older racks (with the words "HP Systems" on the nameplate)
may require that enclosures to be tied together before any
components are mounted inside them. To avoid problems, if
older rack versions are to be tied together, do so before
installing slide members, rails, shelves, units, 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.
NOTE Older racks (with the words "HP Systems" on the nameplate)
may also require door hardware to be in place before mounting
components. If you are using front or rear doors on older
models of the HP Systems Rack, 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 hinge and latch
catch brackets protrude. To avoid injury, temporarily remove
these brackets prior to installing components into the rear of
the rack.
3. If present, remove side panels to allow better access. Follow instructions
included with the rack to do so.
8. Install Fans If Required and Redundant Switch 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 Most HP NetServers have an internal fan system. However,
rack doors must be perforated (front and rear). In this case, you
do not need an extractor fan.
2. If an Uninterruptible Power Supply (UPS) is used, install the UPS
mounting rails and fasten the unit in place following instructions which
accompany it. Place the UPS equipment in the lowest EIA Units of the
rack. Plug the UPS in to charge the batteries as soon as possible.

Chapter 1 Preparation for Cabling the HP NetServer LC 2000r
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3. Install the Redundant Switch, if you have one, in one of the configurations
shown in Appendix B.
9. Mount Component 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.
HP NetServer rack configuration tools (for instance, HP Rack Assistant) make
ordering easier and automatically check that orders are complete. These tools can
be found on the HP web site. Use the Search function with the words “rack
configuration tools” at the following URL:
http://www.hp.com/go/netserver
Look for “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 NetServers and mass storage units have instructions in
their user or installation 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. You may already have installed the UPS, Redundant Switch, and Power
Distribution Units. Do so now if you have not. Begin at the bottom of the
rack, installing therack mount kit for the first component just above the
power components. Configuration information and examples are available
in Chapter 2 and 3.

Chapter 1 Preparation for Cabling the HP NetServer LC 2000r
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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.
CAUTION A tip-over hazard exists. Servers are heavy and may be
awkward to position on their mounting rails. Therefore,
always minimize the weight to be lifted into therack by
removing power supplies and hard disk drives.
When each component is correctly secured in the rack, replace disk drives
and power supplies and add the front panel (bezel) to the unit.
6. Proceed with units one by one, from the bottom of the rack to the top. Fill
any gaps with filler panels.
10. Connect and Route Cables
NOTE Illustrated information about cabling the HP NetServer
LC 2000r in the rack is available in Chapter 3 of this Reference
Guide, which describes the procedures for connecting and
routing cables.
Generally, do the following to ensure cables are correctly connected and managed:
Prepare to Cable the HP NetServer LC 2000r
•Determine which components will be connected to each server.
•Attach Cable Guides to the rack column. See instructions included with
Cable Guides.
•Attach Cable Management Arm to rear of server and to the rack column.

Chapter 1 Preparation for Cabling the HP NetServer LC 2000r
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•Determine configurations for and mount the PDU (Power Distribution Unit
or Units).
Connect the LC 2000r Data Cables to Peripheral Components
•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 supplied with each server. This simplifies attaching
cables later in the procedure.
•Provide sufficient cable length to allow servers to be extended from the
rack for maintenance.
•Attach data cables to their respective components.
Cable the LC 2000r for Power
•Connect each component to a Power Distribution Unit (PDU).
•Connect each PDU to an Uninterruptible Power Supply (UPS) (optional).
•Connect PDU or UPS cables (if present) to branch circuits.
Managing and Routing Cables
•Route cables through the Cable Management Arm and tie-wrap them in
place.
•Route cables through Cable Guide and tie wrap them in place.
Powering Up and Powering Down the Components in the Rack
•Follow the power up sequence. See "Power Up Sequence" in Chapter 3.
•If it becomes necessary to bring the server power down, follow the "Power
Down Considerations" in Chapter 3.
11. Configure the System, Install Doorsand Side Panels
At this point, refer to the NetServer user or installation manual and configure the
system.
Install front and rear doors as required, and mount side panels. Look for detailed
instructions and illustrations with the rack enclosure and components.

15
2 Rack Cabling References
Rack Configuration Tools
Selected reference material derived from HP’s rack configuration tools is
published in this chapter for convenience including the following:
•necessary and optional components
•rack power subsystem configuration and placement
•current and power requirements
•discussion of component location in the rack
•routing cables through the Cable Management Arm and Cable Guide
•cooling requirements and air flow
HP rack configuration tools are available on the worldwide web. Enter the
following URL in your browser:
www.hp.com/go/netserver
At that Web site, search for "configuration tools". Look for Rack Configuration,
Rack Assistant, and Order Assistant.
You can read about the tools or download copies for installation. These tools can
be used to plan a rack configuration for the components of your system.
Power Cabling References and Guidelines
Power Considerations for the HP NetServer LC 2000r
The HP NetServer LC 2000r can be configured in a wide range of voltages from
100 - 240 VAC. Power supply (UPS) and distribution (PDU) components are
available to support these configurations. A Redundant Switch is also available.
Details of power considerations for the HP NetServer LC 2000r include:
◊the appropriate power cord(s) for each server is (are) shipped according
to voltage requirements; refer to Table 2-2 for details
◊each power supply installed in the HP NetServer LC 2000r uses a
separate jumper cord

Chapter 2 Rack Cabling References
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◊available in 100/120, 200/208, and 220/230/240 VAC configurations
for the U. S. market
◊available in either 200/208 VAC or 220/230/240 VAC configurations
for international markets
◊Uninterruptible Power Supply (UPS) models rated at 3000 Volt Amps
(2250 Watts) are available for each voltage range; and a 2200 Volt
Amp (1600 Watts) UPS is available for 110/120 and 220/230/240 VAC
(see Table 2-1)
◊at 100/120 VAC, a wide range Power Distribution Unit (PDU) rated at
16 A is available (9 outlets)
◊for both 200/208 and 220/230/240 voltages, a wide range Power
Distribution Unit (PDU) model rated at 16 Amps is available; a
10-Amp-rated extension PDU is also available (see Figure 2-1)
◊one or more PDUs can be used in each rack enclosure, depending upon
requirements for power, current, and number of receptacles (see Table
2-4)
Power Cables and Components Available
When components are installed in a rack, a power supply subsytem for the rack is
required. HP recommends the NetServer LC 2000r be connected as follows:
•connected to a Power Distribution Unit (PDU)--see Figure 2-1
•through an Uninterruptible Power Supply (UPS)--see Table 2-1
•to a properly protected branch circuit or circuits--see "Site Preparation--
Circuit Breakers" in Chapter 1
NOTE A Redundant Switch is available for use between the UPS and
the branch circuit or between the PDU and the branch circuit.
More information is listed in Table 2-2 and in Appendix B.
Table 2-2 lists details of the cables, components, plugs and receptacles for the
rack power supply subsystems for the HP NetServer LC 2000r.