HP D5970A - NetServer - LCII User manual

HP NetServer LXr 8500
Rack Assembly and Cabling
Reference Guide
HP Part Number D7054-90015
Printed September 1999

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Notice
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Hewlett-Packard Company
Network Server Division
Technical Communications/MS 45SLE
19055 Tantau Avenue
Cupertino, CA 95052-8059 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 servicing of computer
equipment and trained in recognizing hazards in products with hazardous energy levels
and are familiar with weight and stability precautions for rack installations.

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Contents
1 Preparation for Cabling the NetServer LXr 8500........................................ 1
About Cabling the LXr 8500........................................................................... 1
Before You Use this
Cabling Reference Guide ........................................... 1
The HP NetServer LXr 8500...................................................................... 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 LXr 8500 ............................. 15
Power Cables and Components Available ............................................... 16
Power Distribution Units .......................................................................... 18
Guidelines for Powering the LXr in a Rack............................................... 21
Power and Current for Estimating Supply Needs...................................... 22
Data Cabling References and Guidelines..................................................... 25
Key Cabling Guidelines Used in Developing a Rack Layout..................... 25
Cable Guide Placement Considerations Due to Data Cable Lengths........ 25
Cooling Requirements for the LXr 8500 ....................................................... 26
3 Procedure for Connecting and Routing Cables to the LXr 8500 ............. 27
Step 1: Prepare to Cable the HP NetServer LXr 8500.................................. 27
Assess How Components Will be Connected to the Server...................... 27
Attach Cable Guide to Rack Column........................................................ 27
Mount the Cable Management Arm ......................................................... 27
Mount Power Distribution Units................................................................ 28
Step 2: Connect the LXr 8500 Data Cables to Peripheral Components......... 28
Plan Data Connections............................................................................ 28

Contents
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Overview of LXr 8500 Data Connections.................................................. 28
Attach Data Cables to the Server............................................................. 30
Attach Data Cables to Other Components ............................................... 32
Step 3: Cable the LXr 8500 for Power.......................................................... 32
Attaching Server and Component Power Cables...................................... 32
Determining and Balancing Current Draw on Two Circuits in One Rack... 33
208V PDU Rack Power Configurations.................................................... 34
230/240V PDU Rack Power Configurations ............................................. 37
Redundant Power Configuration.............................................................. 39
High Density Configuration...................................................................... 41
Step 4: Managing and Routing Cables......................................................... 42
Using the Cable Management Arm and the Cable Guides........................ 42
Route and Tie Cables into the Management Arm..................................... 42
Step 5: Powering Up and Powering Down the Components in the Rack....... 45
Power Up Sequence................................................................................ 45
Power Down Considerations.................................................................... 45
A Cabling Checklist ...................................................................................... 47
B Considerations in Mounting the Redundant Switch ................................ 49
Index............................................................................................................... 53

1
1 Preparation for Cabling the
NetServer LXr 8500
About Cabling the LXr 8500
NOTE A checklist for the cabling process is included in Appendix A.
Before You Use this Cabling Reference Guide
This HP NetServer LXr 8500 Rack Assembly and Cabling Reference Guide
assumes that you have the rack assembly process completed, have mounted the
HP NetServer LXr 8500, 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 LXr 8500 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 LXr 8500
This Cabling Reference Guide is for the rack-optimized HP NetServer LXr 8500
shown in Figure 1-1.

Chapter 1 Preparation for Cabling the HP NetServer LXr8500
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Figure 1-1. The HP NetServer LXr 8500
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 LXr8500
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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 integrating into 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 LXr8500
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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
24 hour air conditioning (68 - 72 deg. F; 20 - 22 deg. C, 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
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 standard
System Parameters
Hostname
IP address
Subnet Mask
Gateway IP Address
Gateway Host Name
DTC Node Name
Hardware Configuration, Cables, and so on
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 LXr 8500 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.

Chapter 1 Preparation for Cabling the HP NetServer LXr8500
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If you install several HP NetServers on one circuit, however, precautions are
necessary. For instance, if there is a power failure and power is then restored all
the servers immediatelybegin 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 LXr 8500.
•In Europe:
◊For a single LXr 8500 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 LXr 8500 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, 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.

Chapter 1 Preparation for Cabling the HP NetServer LXr8500
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Prevent Electrical Shock
WARNING Ensure site electrical circuitshave 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 LXr8500
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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 level and assessed for 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 lb. (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 LXr8500
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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 andOther 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 feet, when present, under each of the four corners of
each rack. Lower each leveler foot to be in firm contact with the floor.
CAUTION The leveler foot prevent the rack from rolling away when you
install components. Be sure to lower these feet 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 LXr8500
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WARNING When equipment is mounted on slidies, 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
drives from servers.
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 LXr8500
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NOTE Older HP Systems racks 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 mayhave 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 HP Systems racks 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 HaveThem
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/or 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 LXr8500
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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 the rack 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 LXr8500
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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 mounted into the rack 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 LXr
8500 in the rack is available in Chapter 3 of this Cabling
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 LXr 8500
•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 LXr8500
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•Determine configurations for and mount the PDU (Power Distribution Unit
or Units).
Connect the LXr 8500 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 LXr 8500 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 --if present--cables 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.

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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. 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 LXr 8500
The HP NetServer LXr 8500 can be configured in either 208 or 230/240 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 LXr 8500 include:
◊the appropriate power cord for each server is shipped according to
voltage requirements; refer to Table 2-2 for details
◊available in 200/208 VAC configurations for the U. S. market

Chapter 2 Rack Cabling References
16
◊available in either 208 VAC or 230/240 VAC configurations for
international markets
◊Uninterruptible Power Supply (UPS) models rated at 3000 Watts are
available for either voltage range; or a 2250 Watt UPS is available for
230/240 VAC (see Table 2-1)
◊for both 208 and 230/240 voltages, two wide range Power Distribution
Unit (PDU) models (rated 10 A and 16 A) are 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 LXr 8500 be connected as follows:
•connected to a Power Distribution Unit (PDU)--see Figure 2-1.
•through an Uninterrupible 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 two
rack power supply subsystems for the HP NetServer LXr 8500.
Table 2-1. UPS Models and Power Ratings
Uninterruptible Power Supplies (UPS) Available
APC Model Power (VA)1Power (Watts)2
NS3000RMT3U 3000 2250
NS2200RMI3U 2200 1600
NS3000RMI3U 3000 2250
Note 1. Ensure UPS Volt Amps rating is not exceeded. Add power in Volt Amps of each
component and connect no more than those the UPS supports.
Note 2. Also ensure UPS Wattage rating is not exceeded. Add power in Watts of each
component and connect no more than those the UPS supports.