Supero SuperServer 6024H-32 User manual

SUPERSERVER 6024H-32R
SUPERSERVER 6024H-32
SUPER
NIC 1NIC 2
USER’S MANUAL
1.0

The information in this User’s Manual has been carefully reviewed and is believed to be accurate.
The vendor assumes no responsibility for any inaccuracies that may be contained in this document,
makes no commitment to update or to keep current the information in this manual, or to notify any
person or organization of the updates. Please Note: For the most up-to-date version of
this manual, please see our web site at www.supermicro.com.
SUPERMICRO COMPUTER reserves the right to make changes to the product described in this
manual at any time and without notice. This product, including software, if any, and documenta-
tion may not, in whole or in part, be copied, photocopied, reproduced, translated or reduced to any
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IN NO EVENT WILL SUPERMICRO COMPUTER BE LIABLE FOR DIRECT, INDIRECT, SPECIAL,
INCIDENTAL, SPECULATIVE OR CONSEQUENTIAL DAMAGES ARISING FROM THE USE
OR INABILITY TO USE THIS PRODUCT OR DOCUMENTATION, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES. IN PARTICULAR, THE VENDOR SHALL NOT HAVE
LIABILITY FOR ANY HARDWARE, SOFTWARE, OR DATA STORED OR USED WITH THE
PRODUCT, INCLUDING THE COSTS OF REPAIRING, REPLACING, INTEGRATING, INSTALLING
OR RECOVERING SUCH HARDWARE, SOFTWARE, OR DATA.
Any disputes arising between manufacturer and customer shall be governed by the laws of Santa
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be the exclusive venue for the resolution of any such disputes. Supermicro's total liability for all
claims will not exceed the price paid for the hardware product.
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copy any part of this document.
Information in this document is subject to change without notice. Other products and companies
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Copyright © 2005 by SUPER MICRO COMPUTER INC.
All rights reserved.
Printed in the United States of America

iii
Preface
Preface
About This Manual
This manual is written for professional system integrators and PC technicians.
It provides information for the installation and use of the SuperServer 6024H-
32R/6024H-32. Installation and maintainance should be performed by experienced
technicians only.
The SuperServer 6024H-32R/6024H-32 is a high-end server based on the SC823T-
R500LP/SC823T-550LP 2U rackmount chassis and the X6DH3-G2, a dual proces-
sor serverboard that supports Intel®XeonTM processors at a Front Side (System) Bus
speed of 800 MHz and up to 16/32 GB of registered ECC DDR333/266 SDRAM.
Manual Organization
Chapter 1: Introduction
The first chapter provides a checklist of the main components included with the
server system and describes the main features of the X6DH3-G2 serverboard and
the SC823T-R500LP/SC823T-550LP chassis, which comprise the SuperServer
6024H-32R/6024H-32.
Chapter 2: Server Installation
This chapter describes the steps necessary to install the SuperServer 6024H-
32R/6024H-32 into a rack and check out the server configuration prior to powering
up the system. If your server was ordered without processor and memory com-
ponents, this chapter will refer you to the appropriate sections of the manual for
their installation.
Chapter 3: System Interface
Refer here for details on the system interface, which includes the functions and
information provided by the control panel on the chassis as well as other LEDs
located throughout the system.

SUPERSERVER 6024H-32R/6024H-32 User's Manual
iv
Chapter 4: System Safety
You should thoroughly familiarize yourself with this chapter for a general overview
of safety precautions that should be followed when installing and servicing the
SuperServer 6024H-32R/6024H-32.
Chapter 5: Advanced Serverboard Setup
Chapter 5 provides detailed information on the X6DH3-G2 serverboard, including
the locations and functions of connections, headers and jumpers. Refer to this
chapter when adding or removing processors or main memory and when reconfig-
uring the serverboard.
Chapter 6: Advanced Chassis Setup
Refer to Chapter 6 for detailed information on the SC823T-R500LP/SC823T-550LP
server chassis. You should follow the procedures given in this chapter when install-
ing, removing or reconfiguring hard drives or peripheral drives and when replacing
system power supply units and cooling fans.
Chapter 7: BIOS
The BIOS chapter includes an introduction to BIOS and provides detailed informa-
tion on running the CMOS Setup Utility.
Appendix A: BIOS POST Codes
Appendix B: Software Installation
Appendix C: System Specifications

v
Preface
Notes

vi
Table of Contents
Preface
About This Manual ...................................................................................................... iii
Manual Organization ................................................................................................... iii
Chapter 1: Introduction
1-1 Overview ......................................................................................................... 1-1
1-2 Serverboard Features ..................................................................................... 1-2
1-3 Server Chassis Features ................................................................................ 1-3
1-4 Contacting Supermicro ................................................................................... 1-6
Chapter 2: Quick Setup
2-1 Overview .......................................................................................................... 2-1
2-2 Unpacking the System ................................................................................... 2-1
2-3 Preparing for Setup ......................................................................................... 2-1
2-4 Installing the System into a Rack.................................................................... 2-4
2-5 Checking the Serverboard Setup .................................................................... 2-8
2-6 Checking the Drive Bay Setup ...................................................................... 2-10
Chapter 3: System Interface
3-1 Overview ......................................................................................................... 3-1
3-2 Control Panel Buttons .................................................................................... 3-1
Reset ....................................................................................................... 3-1
Power ...................................................................................................... 3-1
3-3 Control Panel LEDs ........................................................................................ 3-2
Power Fail .............................................................................................. 3-2
Overheat/Fan Fail ................................................................................... 3-2
NIC1 ........................................................................................................ 3-2
NIC2 ........................................................................................................ 3-3
HDD ........................................................................................................ 3-3
Power ...................................................................................................... 3-3
3-4 SAS/SATA Drive Carrier LEDs ........................................................................ 3-3
Chapter 4: System Safety
4-1 Electrical Safety Precautions........................................................................... 4-1
4-2 General Safety Precautions............................................................................. 4-2
4-3 ESD Safety Precautions ................................................................................. 4-3
4-4 Operating Precautions .................................................................................... 4-4
SUPERSERVER 6024H-32R/6024H-32 User's Manual

Chapter 5: Advanced Serverboard Setup
5-1 Handling the Serverboard................................................................................ 5-1
5-2 Serverboard Installation................................................................................... 5-2
5-3 Connecting Cables .......................................................................................... 5-3
Connecting Data Cables ........................................................................... 5-3
Connecting Power Cables......................................................................... 5-3
Connecting the Control Panel ................................................................... 5-3
5-4 I/O Ports ......................................................................................................... 5-4
5-5 Installing the Processor and Heatsink............................................................. 5-5
5-6 Installing Memory............................................................................................. 5-8
5-7 Adding PCI Cards............................................................................................ 5-9
5-8 Serverboard Details ...................................................................................... 5-10
X6DH3-G2 Layout ................................................................................... 5-10
X6DH3-G2 Quick Reference................................................................... 5-11
5-9 Connector Definitions .................................................................................... 5-12
Main ATX Power Connector .................................................................. 5-12
Processor Power Connector ................................................................... 5-12
Processor Power Connector ................................................................... 5-12
Auxiliary Power Connector ..................................................................... 5-12
PW_ON Connector ............................................................................... 5-12
Reset Connector .................................................................................... 5-13
Overheat/Fan Fail LED .......................................................................... 5-13
NIC2 LED .............................................................................................. 5-13
NIC1 LED .............................................................................................. 5-13
IDE/SATA LED ...................................................................................... 5-13
Power On LED ....................................................................................... 5-14
Reset Button ......................................................................................... 5-14
NMI Button ............................................................................................. 5-14
Fan Headers............................................................................................ 5-14
ATX PS/2 Keyboard and Mouse Ports.................................................... 5-14
Chassis Intrusion..................................................................................... 5-15
Wake-On-LAN ......................................................................................... 5-15
Wake-On-Ring ........................................................................................ 5-15
LAN1/2 (Ethernet Ports .......................................................................... 5-15
Serial Ports.............................................................................................. 5-16
Universal Serial Bus (USB0/1)................................................................ 5-16
Power LED/Speaker................................................................................ 5-16
Overheat LED ........................................................................................ 5-16
SMB ........................................................................................................ 5-17
vii
Table of Contents

viii
Power SMB Connector .......................................................................... 5-17
SAS Activity LED Header ....................................................................... 5-17
SAS SMB Bus Header ........................................................................... 5-17
Power Supply Fail LED Header .............................................................. 5-18
Alarm Reset ........................................................................................... 5-18
5-10 Jumper Settings............................................................................................. 5-19
Explanation of Jumpers........................................................................... 5-19
CMOS Clear ............................................................................................ 5-19
Onboard Speaker ................................................................................... 5-19
Watch Dog Enable/Disable ..................................................................... 5-20
LAN1/2 Enable/Disable .......................................................................... 5-20
I2C to PCI Enable/Disable ...................................................................... 5-20
VGA Enable/Disable................................................................................ 5-20
System Power Force On ........................................................................ 5-21
3rd Power Supply Fail Detect ................................................................. 5-21
SAS Controller Enable/Disable .............................................................. 5-21
5-11 Onboard Indicators ........................................................................................ 5-22
LAN LEDs................................................................................................ 5-22
SAS Activity LEDs .................................................................................. 5-22
5-12 Parallel Port and Peripheral Drive Connections............................................ 5-23
Parallel Port Connector ........................................................................... 5-23
IPMI ........................................................................................................ 5-23
Floppy Connector .................................................................................... 5-24
SATA Connectors ................................................................................... 5-24
IDE Connector ........................................................................................ 5-25
Chapter 6: Advanced Chassis Setup
6-1 Static-Sensitive Devices .................................................................................. 6-1
6-2 Control Panel ................................................................................................... 6-2
6-3 System Fans.................................................................................................... 6-3
System Fan Failure ................................................................................... 6-3
Replacing System Fans ............................................................................ 6-3
6-4 Drive Bay Installation/Removal........................................................................ 6-4
SAS/SATA Drive Installation...................................................................... 6-5
Installing a Component in the 5.25" Drive Bay......................................... 6-8
CD-ROM and Floppy Drive Installation..................................................... 6-8
6-5 Power Supply................................................................................................... 6-9
6024H-32R: Power Supply Failure ........................................................... 6-9
6024H-32R: Removing/Replacing the Power Supply ............................... 6-9
SUPERSERVER 6024H-32R/6024H-32 User's Manual

Table of Contents
ix
6024H-32: Power Supply Failure ............................................................ 6-10
6024H-32: Removing/Replacing the Power Supply................................ 6-10
Chapter 7: BIOS
7-1 Introduction ...................................................................................................... 7-1
7-2 Running Setup ................................................................................................ 7-2
7-3 Main BIOS Setup ............................................................................................ 7-2
7-4 Advanced Setup ............................................................................................. 7-6
7-5 Security ......................................................................................................... 7-17
7-6 Boot .............................................................................................................. 7-18
7-7 Exit ................................................................................................................ 7-19
Appendices:
Appendix A: BIOS POST Codes ............................................................................... A-1
Appendix B: Software Installation ............................................................................. B-1
Appendix C: System Specifications ......................................................................... C-1

Notes
x
SUPERSERVER 6024H-32R/6024H-32 User's Manual

Chapter 1
Introduction
1-1 Overview
The SuperServer 6024H-32R/6024H-32 is a high-end server comprised of two
main subsystems: the SC823T-R500LP/SC823T-550LP 2U server chassis and
the X6DH3-G2 Intel Xeon dual processor serverboard. Please refer to our web
site for information on operating systems that have been certified for use with the
SuperServer 6024H-32R/6024H-32 (www.supermicro.com).
In addition to the serverboard and chassis, various hardware components have been
included with the SuperServer 6024H-32R/6024H-32, as listed below:
 One (1) 3.5" floppy drive [FPD-PNSC-02(01)]
 One (1) slim CD-ROM drive [CDM-TEAC-24(B)]
 Four (4) 8-cm hot-swap chassis fans (FAN-0070)
 One (1) 2U chassis air shroud (CSE-PT47)
 One (1) 5.25" dummy drive tray [CSE-PT41(B)]
 One (1) front control panel cable (CBL-0049)
 Serial Attached SCSI (SAS) Accessories
One (1) SAS backplane [CSE-SATA-822]
Two (2) SAS data cables (CBL-0118)
Six (6) SAS hot-swap drive carriers [CSE-PT17(B)]
 One (1) rackmount kit (CSE-PT025)
 One (1) driver CD (CDR-X6)
 Optional:
One (1) front access USB kit [CSE-PT29(B)]
Two (2) CPU passive heatsinks (SNK-P0010)
Chapter 1: Introduction
1-1

1-2
SUPERSERVER 6024H-32R/6024H-32 User's Manual
1-2 Serverboard Features
At the heart of the SuperServer 6024H-32R/6024H-32 lies the X6DH3-G2, a dual
processor serverboard based on the Intel E7520 chipset and designed to provide
maximum performance. Below are the main features of the X6DH3-G2. (See Figure
1-1 for a block diagram of the E7520 chipset).
Processors
The X6DH3-G2 supports single or Intel dual Xeon EM64T type processors at
a front side (system) bus speed of 800 MHz. Please refer to the serverboard
description pages on our web site for a complete listing of supported processors
(www.supermicro.com).
Memory
The X6DH3-G2 has eight 240-pin DIMM slots that can support up to 16 GB of
dual channel, registered ECC DDR2-400 SDRAM. The memory is an interleaved
configuration, which requires modules of the same size and speed to be installed
in pairs.
Serial ATA
The 6300ESB portion of the E7520 chipset includes a SATA Host controller that
provides a two-port Serial ATA subsystem. In addition, an Adaptec AIC-9410W
controller integrated onboard supports eight SAS or SATA drives, which are RAID
0, 1 and JBOD supported. The SAS drives are hot-swappable units.
Note: The operating system you use must have RAID support to enable the hot-
swap capability and RAID function of the SAS drives.
PCI Expansion Slots
The X6DH3-G2 has six PCI expansion slots, which includes two x8 PCI-Express
slots, one 64-bit 133 MHz PCI-X slot, two 64-bit 100 MHz PCI-X slots and one 32-bit
33 MHz PCI slot. (One 100 MHz PCI slot supports Zero Channel RAID.)

1-3
Chapter 1: Introduction
Onboard Controllers/Ports
One floppy drive controller and two onboard ATA/100 controllers are provided to
support up to four IDE hard drives or ATAPI devices. The color-coded I/O ports
include one COM port (an additional COM header is located on the serverboard),
a VGA (monitor) port, a parallel (printer) port, two USB 2.0 ports, PS/2 mouse and
keyboard ports and two gigabit Ethernet ports. Two front side USB ports are also
included on the front of the chassis.
ATI Graphics Controller
The X6DH3-G2 features an integrated ATI video controller based on the Rage XL
graphics chip.
Other Features
Other onboard features that promote system health include onboard voltage moni-
tors, a chassis intrusion header, auto-switching voltage regulators, chassis and CPU
overheat sensors, virus protection and BIOS rescue.
1-3 Server Chassis Features
The SuperServer 6024H-32R/6024H-32 is a high-end, scaleable server platform de-
signed with today's most state-of-the-art features. The following is a general outline
of the main features of the SC823T-R500LP/SC823T-550LP server chassis.
System Power
The SC823T-R500LP features a redundant 500W power supply that consists of
two separate power supply modules. Under normal operation, both modules share
the load and run continuously. If one fails, the other module will pick up the load
and keep the system running without interruption. A failed power supply module
will illuminate the power fail LED and set off an onboard alarm. The power sup-
ply modules are hot-swappable, so you don't have to power down the system to
replace a module.
The SC823T-550LP features a single 550W power supply.

1-4
SUPERSERVER 6024H-32R/6024H-32 User's Manual
SAS/SATA Subsystem
The SAS/SATA subsystem supports up to six SAS/SATA drives. The SAS/SATA
drives are hot-swappable units and are connected to a backplane that provides
power and control.
Note: The operating system you use must have RAID support to enable the hot-
swap capability of the SATA drives.
Front Control Panel
The SuperServer 6024H-32R/6024H-32's control panel provides you with system
monitoring and control. LEDs indicate system power, HDD activity, network activity,
overheat/fan fail and (6024H-32R only) power supply failure. A main power button
and a system reset button are also included.
I/O Backplane
The SC823T-R500LP/SC823T-550LP is an ATX form factor chassis that is designed
to be used in a 2U rackmount configuration. The I/O backplane provides seven low-
profile motherboard expansion slots, one COM port, a parallel port, a VGA port, two
USB 2.0 ports, PS/2 mouse and keyboard ports and two gigabit Ethernet ports.
Cooling System
The SC823T-R500LP/SC823T-550LP chassis has an innovative cooling design
that includes four 8-cm hot-plug system cooling fans located in the middle section
of the chassis. An air shroud channels the air flow from these fans to efficiently
cool the processor area of the system. The power supply module(s) also includes
a cooling fan.

1-5
Chapter 1: Introduction
Figure 1-1. Intel E7520 Chipset:
System Block Diagram
Note: This is a general block diagram. Please see Chapter 5 for details.
MCH
MCH
4_DDR_333/266
4_DDR_333/266
DIMMs
DIMMs
6300ESB
6300ESB
FWH
FWH
LPC I/O
LPC I/O
LPC BUS
LPC BUS
HUB
HUB
BMC CON.
BMC CON.
PCI BUS(32-BIT)
PCI BUS(32-BIT)
DIMMs
DIMMs
USB
USB
0,1,2,3
0,1,2,3
USB PORT
USB PORT
VGA
VGA
KB.
KB.
SER.2
SER.2
SER.1
SER.1
H/W
H/W
MONITOR
MONITOR
FDD.
FDD.
0,
0,
1
SATA
SATA
SATA
SATA
UDMA-100
UDMA-100
IDE
IDE
PRI/SEC
PRI/SEC
A
PXH#1
PXH#1
B
SATA
SATA
HC2_8Ports
HC2_8Ports
PCIX BUS(100 MHZ)
PCIX BUS(100 MHZ)
PCIX BUS(133 MHZ)
PCIX BUS(133 MHZ)
1.5V
1.5V
3.3V
3.3V
DDR266
DDR266
DDR333
DDR333
8.1W 133
8.1W 133
266MB/s
266MB/s
1_PCIX-100
1_PCIX-100
GRN_Slot
GRN_Slot
G LAN
G LAN
K_II
K_II
1_PCIX-133
1_PCIX-133
Slot
Slot
PCI-E A(X8)
PCI-E A(X8)
1_PCIX-E
1_PCIX-E
(X8)Slot
(X8)Slot
PCI-E C(X8)
PCI-E C(X8)
(X8)Slot
(X8)Slot
1_PCIX-E
1_PCIX-E
PCI-E B(X8)
PCI-E B(X8)
B
C
A
1_PCIX-100
1_PCIX-100
Slot
Slot
GLAN
GLAN
K_II
K_II
PCIX66_BUS
PCIX66_BUS
1_PCI32
1_PCI32
4_DDR_333/266
4_DDR_333/266
CH.A
CH.A
CH.B
CH.B
CPU 1
CPU 1
CPU 2
CPU 2
Slot
Slot

1-6
SUPERSERVER 6024H-32R/6024H-32 User's Manual
1-4 Contacting Supermicro
Headquarters
Address: SuperMicro Computer, Inc.
980 Rock Ave.
San Jose, CA 95131 U.S.A.
Tel: [phone]
Fax: [phone]
Email: [email protected] (General Information)
[email protected] (Technical Support)
Web Site: www.supermicro.com
Europe
Address: SuperMicro Computer B.V.
Het Sterrenbeeld 28, 5215 ML
's-Hertogenbosch, The Netherlands
Tel: [phone]
Fax: [phone]
Email: [email protected] (General Information)
[email protected] (Technical Support)
[email protected] (Customer Support)
Asia-Pacific
Address: SuperMicro, Taiwan
4F, No. 232-1, Liancheng Rd.
Chung-Ho 235, Taipei, Taiwan, R.O.C.
Tel: [phone]
Fax: [phone]
Web Site: www.supermicro.com.tw
Technical Support:
Email: [email protected]
Tel: [phone], ext.132 or 139

Chapter 2: Server Installation
2-1
Chapter 2
Server Installation
2-1 Overview
This chapter provides a quick setup checklist to get your SuperServer 6024H-
32R/6024H-32 up and running. Following these steps in the order given should
enable you to have the system operational within a minimum amount of time.
This quick setup assumes that your system has come to you with the processors
and memory preinstalled. If your system is not already fully integrated with a
serverboard, processors, system memory etc., please turn to the chapter or section
noted in each step for details on installing specific components.
2-2 Unpacking the System
You should inspect the box the SuperServer 6024H-32R/6024H-32 was shipped
in and note if it was damaged in any way. If the server itself shows damage you
should file a damage claim with the carrier who delivered it.
Decide on a suitable location for the rack unit that will hold the SuperServer 6024H-
32R/6024H-32. It should be situated in a clean, dust-free area that is well ventilated.
Avoid areas where heat, electrical noise and electromagnetic fields are generated.
You will also need it placed near a grounded power outlet. Read the Rack and
Server Precautions in the next section.
2-3 Preparing for Setup
The box the SuperServer 6024H-32R/6024H-32 was shipped in should include two
sets of rail assemblies, two rail mounting brackets and the mounting screws you
will need to install the system into the rack. Follow the steps in the order given to
complete the installation process in a minimum amount of time. Please read this
section in its entirety before you begin the installation procedure outlined in the
sections that follow.

2-2
SUPERSERVER 6024H-32R/6024H-32 User's Manual
Choosing a Setup Location
- Leave enough clearance in front of the rack to enable you to open the front
door completely (~25 inches).
- Leave approximately 30 inches of clearance in the back of the rack to allow
for sufficient airflow and ease in servicing.
-This product is for installation only in a Restricted Access Location (dedicated
equipment rooms, service closets and the like).
Rack Precautions
- Ensure that the leveling jacks on the bottom of the rack are fully extended to the
floor with the full weight of the rack resting on them.
- In single rack installation, stabilizers should be attached to the rack.
- In multiple rack installations, the racks should be coupled together.
- Always make sure the rack is stable before extending a component from the
rack.
- You should extend only one component at a time - extending two or more simul-
taneously may cause the rack to become unstable.
Server Precautions
- Review the electrical and general safety precautions in Chapter 4.
- Determine the placement of each component in the rack before you install the
rails.
- Install the heaviest server components on the bottom of the rack first, and then
work up.
- Use a regulating uninterruptible power supply (UPS) to protect the server from
power surges, voltage spikes and to keep your system operating in case of a power
failure.
-Allow the hot plug SATA drives and power supply units to cool before touch-
ing them.
- Always keep the rack's front door and all panels and components on the servers
closed when not servicing to maintain proper cooling.
!!
Warnings and Precautions!

Chapter 2: Server Installation
2-3
Rack Mounting Considerations
Ambient Operating Temperature
If installed in a closed or multi-unit rack assembly, the ambient operating tempera-
ture of the rack environment may be greater than the ambient temperature of the
room. Therefore, consideration should be given to installing the equipment in an
environment compatible with the manufacturer’s maximum rated ambient tempera-
ture (Tmra).
Reduced Airflow
Equipment should be mounted into a rack so that the amount of airflow required
for safe operation is not compromised.
Mechanical Loading
Equipment should be mounted into a rack so that a hazardous condition does not
arise due to uneven mechanical loading.
Circuit Overloading
Consideration should be given to the connection of the equipment to the power
supply circuitry and the effect that any possible overloading of circuits might have
on overcurrent protection and power supply wiring. Appropriate consideration of
equipment nameplate ratings should be used when addressing this concern.
Reliable Ground
A reliable ground must be maintained at all times. To ensure this, the rack itself
should be grounded. Particular attention should be given to power supply connec-
tions other than the direct connections to the branch circuit (i.e. the use of power
strips, etc.).

2-4
SUPERSERVER 6024H-32R/6024H-32 User's Manual
2-4 Installing the System into a Rack
This section provides information on installing the SuperServer 6024H-32R/6024H-
32 into a rack unit. If the 6024H-32R/6024H-32 has already been mounted into
a rack, you can skip ahead to Sections 2-5 and 2-6. There are a variety of rack
units on the market, which may mean the assembly procedure will differ slightly.
The following is a guideline for installing the system into a rack with the rack rails
provided. You should also refer to the installation instructions that came with the
rack unit you are using.
Identifying the Sections of the Rack Rails
You should have received two rack rail assemblies with the SuperServer 6024H-
32R/6024H-32. Each of these assemblies consist of two sections: an inner fixed
chassis rail that secures directly to the 6024H-32R/6024H-32 (A) and an outer
fixed rack rail that secures directly to the rack itself (B). All screws and hardware
mentioned in the installation steps should be included in the hardware kit.
To remove the fixed chassis rail (A), pull it out as far as possible - you should hear
a "click" sound as a locking tab emerges from inside the rail assembly and locks
the inner rail. Then depress the locking tab to pull the inner rail completely out.
Do this for both the left and right side rack rail assemblies.
Figure 2-1. Identifying the Sections of the Rack Rails
A
B
Locking Tab