Supermicro A+ Server AS-1124US-TNRP User manual

USER’S MANUAL
Revision 1.0b

AS -1124US-TNRP

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, and 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 website at www.supermicro.com.
Super Micro Computer, Inc. ("Supermicro") reserves the right to make changes to the product described in this manual
at any time and without notice. This product, including software and documentation, is the property of Supermicro and/
or its licensors, and is supplied only under a license. Any use or reproduction of this product is not allowed, except
as expressly permitted by the terms of said license.
IN NO EVENT WILL Super Micro Computer, Inc. BE LIABLE FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL,
SPECULATIVE OR CONSEQUENTIAL DAMAGESARISING FROM THE USE OR INABILITYTO USE THIS PRODUCT
OR DOCUMENTATION, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. IN PARTICULAR, SUPER
MICRO COMPUTER, INC. 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 Clara County in the
State of California, USA. The State of California, County of Santa Clara shall 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.
FCC Statement: This equipment has been tested and found to comply with the limits for a Class A or Class B digital
device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference when the equipment is operated in industrial environment for Class A device or in residential
environment for Class B device. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the manufacturer’s instruction manual, may cause harmful interference with
radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in
which case you will be required to correct the interference at your own expense.
California Best Management Practices Regulations for Perchlorate Materials: This Perchlorate warning applies only
to products containing CR (Manganese Dioxide) Lithium coin cells. “Perchlorate Material-special handling may apply.
See www.dtsc.ca.gov/hazardouswaste/perchlorate”.
WARNING: This product can expose you to chemicals including
lead, known to the State of California to cause cancer and birth
defects or other reproductive harm. For more information, go
to www.P65Warnings.ca.gov.
!
The products sold by Supermicro are not intended for and will not be used in life support systems, medical equipment,
nuclear facilities or systems, aircraft, aircraft devices, aircraft/emergency communication devices or other critical

property damage. Accordingly, Supermicro disclaims any and all liability, and should buyer use or sell such products
for use in such ultra-hazardous applications, it does so entirely at its own risk. Furthermore, buyer agrees to fully
indemnify, defend and hold Supermicro harmless for and against any and all claims, demands, actions, litigation, and
proceedings of any kind arising out of or related to such ultra-hazardous use or sale.
Manual Revision 1.0b
Release Date: May 05, 2021 mk
Unless you request and receive written permission from Super Micro Computer, Inc., you may not copy any part of this

to herein are trademarks or registered trademarks of their respective companies or mark holders.
Copyright © 2021 by Super Micro Computer, Inc.
All rights reserved.
Printed in the United States of America

3
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 server. Installation and maintenance should be
performed by experienced technicians only.

on supported memory, processors and operating systems (https://www.supermicro.com).
Notes
For your system to work properly, please follow the links below to download all necessary
drivers/utilities and the user’s manual for your server.
• Supermicro product manuals: http://www.supermicro.com/support/manuals/
• Product drivers and utilities: https://www.supermicro.com/wftp/driver/
• Product safety info: http://www.supermicro.com/about/policies/safety_information.cfm
If you have any questions, please contact our support team at:
[email protected]m
This manual may be periodically updated without notice. Please check the Supermicro website
for possible updates to the manual revision level.
Secure Data Deletion
A secure data deletion tool designed to fully erase all data from storage devices can be found
on our website: https://www.supermicro.com/about/policies/disclaimer.cfm?url=/wftp/utility/
Lot9_Secure_Data_Deletion_Utility/
Warnings
Special attention should be given to the following symbols used in this manual.
Warning! Indicates high voltage may be encountered when performing a procedure.
Warning! Indicates important information given to prevent equipment/property damage


4
A+ Server AS -1124US-TNRP User's Manual
Contents
Chapter 1 Introduction
1.1 Overview...............................................................................................................................8
1.2 Unpacking the System .........................................................................................................8
1.3 System Features ..................................................................................................................9
1.4 Chassis Features ...............................................................................................................10
Control Panel ....................................................................................................................10
Chassis Front ....................................................................................................................11
Chassis Rear.....................................................................................................................12
1.5 Motherboard Layout ...........................................................................................................13
Quick Reference ...............................................................................................................14
System Block Diagram......................................................................................................15
1.6 Where to Get Replacement Components..........................................................................16
1.7 Returning Merchandise for Service....................................................................................16
Chapter 2 Server Installation
2.1 Overview.............................................................................................................................17
2.2 Preparing for Setup ............................................................................................................17
Choosing a Setup Location...............................................................................................17
Rack Precautions ..............................................................................................................17
Server Precautions............................................................................................................18
Rack Mounting Considerations .........................................................................................18
Ambient Operating Temperature....................................................................................18
 ............................................................................................................................18
Mechanical Loading.......................................................................................................18
Circuit Overloading ........................................................................................................19
Reliable Ground.............................................................................................................19
2.3 Installing the Rails..............................................................................................................20
Identifying the Rails...........................................................................................................20
Installing the Outer Rails onto the Rack...........................................................................21
2.4 Installing the Chassis into a Rack ...................................................................................22
Removing the Chassis from the Rack ..............................................................................23
Installing the Server into a Telco Rack .............................................................................24

5
Contents
Chapter 3 Maintenance and Component Installation
3.1 Removing Power ................................................................................................................25
3.2 Accessing the System........................................................................................................25
3.3 Motherboard Components..................................................................................................26
Processor and Heatsink Installation..................................................................................26
Memory Installation ...........................................................................................................34
Memory Support ............................................................................................................34
DIMM Module Population Guidelines ............................................................................34
DIMM Installation...........................................................................................................36
DIMM Removal..............................................................................................................36
Motherboard Battery .........................................................................................................37
3.4 Chassis Components .........................................................................................................38
Storage Drives ..................................................................................................................38
Drive Carrier Indicators..................................................................................................38
Cable Routing................................................................................................................38
Replacing or Installing Drives........................................................................................39
System Cooling .................................................................................................................41
System Fan Replacement .............................................................................................42
Installing the Air Shroud ................................................................................................43
Checking the Server Air Flow........................................................................................44
Overheating ...................................................................................................................44
Power Supply ....................................................................................................................45
Power Supply LEDs.......................................................................................................45
PCI Expansion Cards .......................................................................................................46
Removing the Ultra Riser Card.........................................................................................49
Chapter 4 Motherboard Connections
4.1 Power Connections ............................................................................................................50
4.2 Headers and Connectors ...................................................................................................51
Control Panel.................................................................................................................53
4.3 Ports ...................................................................................................................................56
4.4 Jumpers..............................................................................................................................57
Explanation of Jumpers.................................................................................................57
4.5 LED Indicators ...................................................................................................................59

6
A+ Server AS -1124US-TNRP User's Manual
Chapter 5 Software
5.1 Microsoft Windows OS Installation.....................................................................................60
5.2 Driver Installation................................................................................................................62
5.3 SuperDoctor®5...................................................................................................................63
5.4 BMC....................................................................................................................................64
BMC ADMIN User Password ............................................................................................64
Chapter 6 UEFI BIOS
6.1 Introduction.........................................................................................................................65
Starting BIOS Setup Utility................................................................................................65
6.2 Main Setup .........................................................................................................................65
.........................................................................................67
6.4 IPMI ................................................................................................................................... 83
6.5 Event Logs .........................................................................................................................86
6.6 Security...............................................................................................................................88
6.7 Boot ....................................................................................................................................93
6.8 Save & Exit.........................................................................................................................94
6.9 BIOS Update Using IPMI ...................................................................................................96
6.10 UEFI BIOS Recovery ........................................................................................................98
Overview ...........................................................................................................................98
Recovering the UEFI BIOS Image....................................................................................98
Recovering the BIOS Block with a USB Device...............................................................98
Appendix A Standardized Warning Statements for AC Systems
Appendix B System Specications
Appendix C UEFI BIOS Recovery

7
Contacting Supermicro
7
Contacting Supermicro
Headquarters
Address: Super Micro 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)
Website: www.supermicro.com
Europe
Address: Super Micro 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)
Website: www.supermicro.nl
Asia-Pacic
Address: Super Micro Computer, Inc.
3F, No. 150, Jian 1st Rd.
Zhonghe Dist., New Taipei City 235
Taiwan (R.O.C)
Tel: [phone]
Fax: [phone]
Email: [email protected]
Website: www.supermicro.com.tw

8
A+ Server AS -1124US-TNRP User's Manual
Chapter 1
Introduction
1.1 Overview
The Supermicro AS -1124US-TNRP A+ server is a high-end enterprise server well suited
             
H12DSU-iN motherboard and the CSE-119UHTS-R1K22HP-A chassis. This chapter provides
a brief outline of the functions and features.
In addition to the motherboard and chassis, several important parts are listed below.
Main Parts List
Description Part Number Quantity
Power supply modules PWS-1K22A-1R 2
Backplane BPN-SAS3-119A-N12 1
LAN add-on card AOC-URG4N4-i4XTS 1
Fans FAN-0163L4 8
Air Shrouds MCP-310-81917-0B 1 set
Heatsinks SNK-P0062P 2
Riser cards: for 1 PCIe x16 slot (LP)
for 2 PCIe x16 slot (FH/ 9.5"L)
RSC-W-66G4
RSC-WR-6
1
1
Rack mount rails MCP-290-00062-0N 1 set
 MCP-220-00178-0B 12
Software Out of Band License key included for OOB BIOS management SFT-OOB-LIC 1
Note
as compliant with CSA or UL models: 119UH-R10H12, 119UH-R12H12, 119UH-10, 119UH-12
1.2 Unpacking the System
Inspect the box the system was shipped in and note if it was damaged in any way. If any

Decide on a suitable location for the rack unit that will hold the server. It should be situated
in a clean, dust-free area that is well ventilated. Avoid areas where heat, electrical noise and

Be sure to read the precautions and considerations noted in Appendix A.

9
Chapter 1: Introduction
1.3 System Features
The following table is an overview of the main features of the AS -1124US-TNRP server.
System Features
Motherboard
H12DSU-iN
Chassis
CSE-119UHTS-R1K22HP-A
CPU
Dual AMD EPYC 7003/7002 Series in SP3 sockets (7003 Series Processor drop-in support requires BIOS
version 2.0 or newer)
Chipset
System on Chip
Memory
Up to 8TB of ECC DDR4 3200MHz speed, RDIMM/LRDIMM/3DS/NVDIMM memory in 32 slots
Storage Drives
Twelve hot-swap 2.5" bays for choice of:
NVMe Gen4 U.2 drives (default)
SATA/SAS (optional SAS cards, cables and trays required)
M.2 NVMe (optional add-on card required)
Expansion Slots
Two full height, 9.5"-length x16 PCIe 4.0


Cooling
Eight mid-chassis 4-cm counter-rotating fans; two air shrouds, two CPU heatsinks
Power
1200W redundant modules, 80Plus Titanium Level (96%+)

Input/Output
LAN: Two 10GBase-T ports and two 10G SFP+ ports by means of the Ultra card; one dedicated IPMI port
USB 3.0:
Two ports on the rear I/O panel
One port on front
One Type A header
One COM port
One VGA port
One TPM header
Form Factor
1 U rackmount, (WxHxD) 17.2 x 1.7 x 28.5 in. (437 x 43 x 724 mm)

10
A+ Server AS -1124US-TNRP User's Manual
Figure 1-1. Control Panel
1.4 Chassis Features
Control Panel
Power switches and status LEDs are located on the control panel on the front of the chassis.
Control Panel Features
Item Features Description
1Power button The main power switch applies or removes primary power from the power supply to
the server but maintains standby power.
2Power LED Indicates power is being supplied to the system power supply units. This
LED is illuminated when the system is operating normally.
3HDD 
4NIC LED 
5Information LED Alerts operator to several states, as noted in the table below
6UID button/LED
󰀨
Information LED and a blue LED on the rear of the chassis. These are used to
locate the server in large racks and server banks.
Information LED
Status Description
Continuously on and
red
An overheat condition has occurred.
(This may be caused by cable congestion.)
Blinking red (1Hz) Fan failure, check for an inoperative fan.
Blinking red (0.25Hz) Power failure, check for a non-operational power
supply.
Solid blue UID has been activated locally to locate the
server in a rack environment.
Blinking blue UID has been activated using IPMI to locate the
server in a rack environment.
15 4 3 26

11
Chapter 1: Introduction
Figure 1-2. Front View
Chassis Front Features
Item Features Description
1Control Panel see previous page
2USB One USB 3.0 port
3Drive Bays 
4Asset Tag/
BMC Password sticker
A slide-out tab for an asset tag; also the sticker showing the default IPMI/
BMC ADMIN password is on the underside of the tab.
Chassis Front
The illustration below shows the features included on the front of the chassis. Storage drive
carriers display status lights.
1
3
24
(2) Label on 119U service tag (label on bottom)
Figure 1-3. Location of the BMC Password Label
This graphic is for illustration only.
󰀨

12
A+ Server AS -1124US-TNRP User's Manual
Chassis Rear
The illustration below shows the features included on the rear of the chassis. Power supply
modules display status lights.
Figure 1-4. Rear View
Chassis Rear Features
Item Features Description
1Power Supply Two power supply modules, PWS1 on the left, PWS2 on the right
2LAN Two 10G RJ45 ports and two 10G SFP+ ports
3USB Two USB 3.0 ports
4IPMI LAN Dedicated LAN port for IPMI
5COM Serial port
6UID UID indicator and button to toggle the UID indicators
7VGA Video port
8PCIe Slot 
9PCIe Slot Two PCIe x16 full height, 9.5" length slots
2 3 94 5 7
8
11
9
Figure 1-5. LAN Numbering
6
12
43
SFP+

13
Chapter 1: Introduction
Figure 1-6. Motherboard Layout
1.5 Motherboard Layout

the table on the following page for descriptions. For detailed descriptions, pinout information

+
DESIGNED IN USA
H12DSU-iN
REV:
USB0/1 (3.0)
IPMI_LAN
COM1
VGA
UID_LED
P1_NVME0/1 SATA0-7 SATA8
BP PWR1-4
SATA9
FAN2
FAN1
CPU1
GPU PWR1
PSU2
FAN3FAN5FAN6
FAN7
FAN8
CPU2
FAN4
PSU1
JBT1
JF1
FP1
PWROK LED
P2-DIMME1~H2
P1-DIMMA1~D2
SXB2 SXB3A
JIPMB1
SXB1A
SP1
SXB1C
USB3/4 (3.0)
JTPM1
SXB3B
USB2 (3.0)
P2-DIMMA1~D2
GPU PWR2-3
P2_NVME2/3
SXB1B
P2_NVME0 SATA10-13
P2_NVME1 SATA14-17
P1-DIMME1~H2
JSD1
JSD2
JNCSI1
SXB3C
JUID_SW
BMC_HB LED
JWD1
P1_NVME2/3
BT1
JL1
JSEN1

14
A+ Server AS -1124US-TNRP User's Manual
Quick Reference
Jumper Description Default Setting
JBT1 CMOS Clear Open (Normal)
JWD1 Watch Dog Pins 1-2 (Reset)
Connector Description
JIPMB1 4-pin External I2C Header (for an IPMI card)
BT1 Onboard Battery
VGA VGA Port
UID_SW UID Switch
COM1 COM Port
IPMI_LAN IPMI LAN
USB0/1 (3.0) USB0/1 (3.0) Rear Side Connector
USB3/4 (3.0) USB3/4 (3.0) Front Side Pin Header
USB2 (3.0) USB2 (3.0) Type A Connector
FAN1~FAN8 4-pin System/CPU Fan Headers
JCPLD1 Complex-Programmable Logical Device (CPLD) header
FP1 Front Panel Connector
JF1 Front Control Panel Header 1
P1_NVME0/1 SATA0-7 Processor 1 NVMe Ports 0/1 / SATA 0~7
P1_NVME2/3 Processor 1 NVMe Ports 2/3
P2_NVME0/1 SATA10-17 Processor 2 NVMe Ports 0/1 / SATA 10~17
P2_NVME2/3 Processor 2 NVMe Ports 2/3
SATA8~9 SATA 3.0 Ports
JSD1-2 Disk-On-Module Power Connector
JNCSI1 NCSI
JL1 Chassis Intrusion Header
JSEN1 Inlet Sensor Header
GPU PWR1-3 12V 8-pin Power Connector for Riser Card GPU
BP PWR1-4 12V and 5V 8-pin Power Connector for Backplane
JTPM1 Trusted Platform Module/Port 80 Connector
PSU1/PSU2 Motherboard Main Power Supply Connector
SXB1A/1B/1C WIO-L Riser Card Support (CPU2 PCIe 4.0 x32)
SXB2 WIO-R Riser Card Support (CPU2 PCIe 4.0 x16)
SXB3A/3B/3C Ultra I/O Riser Card Support (CPU1 PCIe 4.0 x40)
LED Description State: Status
UID_LED UID LED Solid Blue: UID Switch On
BMC_HB LED BMC Heartbeat LED Green: Blinking (BMC normal)
Green: Fast blinking (BMC initializing)
PWROK LED Power LED Solid Green: Power On

15
Chapter 1: Introduction
Note: This is a general block diagram and may not exactly represent the features on your

motherboard.
System Block Diagram
Figure 1-7. Chipset Block Diagram
System Block Diagram –AS -1124US-TNRP
VGA, COM,
IPMI LAN
RJ45
WIO LH Riser Slot
(32 PCI-E Lanes)
16 DDR4 DIMM Slots 16 DDR4 DIMM Slots
BMC AST2500
Ultra Riser Card
-4 NVMe Ports (PCI-E x16)
-Network choose 2 10G + 2 SFP+
-Internal 1 PCI-E 4.0-x 16 Slot
Ultra Riser Slot
(40 PCI-E Lanes)
PCI-E x32
PCI-E x40
Failover (NC-SI)
SATA 8 & 9
SATA DOM
xGMI2 x4
AMD EPYC
(CPU1)
AMD EPYC
(CPU 0)
2 USB 3.0
(2 rear,1 Internal
Type A)
JSLIM1
(NVMe x2 /
8 SATA)
JSLM2
(NVMe x2)
JSLIM 4 (NVMe x2)
JSLIM3-1
(NVMe x1 4SATA)
JSLIM3-2
(NVMe x1 4SATA)
WIO LH Riser Card
-2 PCI-E 4.0 x16 Slots
WIO RH Riser Card
-1 PCI-E 4.0 x 16 LP Slot
WIO RH Riser Slot
(16 PCI-E Lanes)
1 x Front USB 3.0
12 NVMe/SATA3/SAS3 Backplane
-8 NVMe/SATA3 Hybrid Drive Bays (NVMe from CPU0)
-4 NVMe/SATA3 Hybrid Drive Bays (NVMe from CPU1)

16
A+ Server AS -1124US-TNRP User's Manual
1.6 Where to Get Replacement Components
If you need replacement parts for your system, to ensure the highest level of professional
service and technical support, purchase exclusively from our Supermicro Authorized
Distributors/System Integrators/Resellers. A list can be found at: http://www.supermicro.com.
Click the "Where to Buy" link.
1.7 Returning Merchandise for Service
A receipt or copy of your invoice marked with the date of purchase is required before any
warranty service will be rendered. You can obtain service by calling your vendor for a Returned
Merchandise Authorization (RMA) number. When returning to the manufacturer, the RMA
number should be prominently displayed on the outside of the shipping carton, and mailed
prepaid or hand-carried. Shipping and handling charges will be applied for all orders that
must be mailed when service is complete.
For faster service, RMA authorizations may be requested online (http://www.supermicro.com/
support/rma/).
Whenever possible, repack the chassis in the original Supermicro carton, using the original
packaging material. If these are no longer available, be sure to pack the chassis securely,
using packaging material to surround the chassis so that it does not shift within the carton
and become damaged during shipping.
This warranty only covers normal consumer use and does not cover damages incurred in
shipping or from failure due to the alteration, misuse, abuse or improper maintenance of
products.


Chapter 2: Server Installation
17
Chapter 2
Server Installation
2.1 Overview
This chapter provides advice and instructions for mounting your system in a server rack.
If your system is not already fully integrated with processors, system memory etc., refer to

Caution: Electrostatic Discharge (ESD) can damage electronic components. To prevent such
damage to PCBs (printed circuit boards), it is important to use a grounded wrist strap, handle
all PCBs by their edges and keep them in anti-static bags when not in use.
2.2 Preparing for Setup
The box in which the system was shipped should include the rackmount hardware needed to
install it into the rack. Please read this section in its entirety before you begin the installation.
Choosing a Setup Location
• The system should be situated in a clean, dust-free area that is well ventilated. Avoid areas

• Leave enough clearance in front of the rack so that you can open the front door completely
(~25 inches) and approximately 30 inches of clearance in the back of the rack to allow
󰀩
• This product should be installed only in a Restricted Access Location (dedicated equipment
rooms, service closets, etc.).
• This product is not suitable for use with visual display workplace devices according to §2
of the German Ordinance for Work with Visual Display Units.
Rack Precautions
• 
the full weight of the rack rests on them.

A+ Server AS -1124US-TNRP User's Manual
18
• In single rack installations, stabilizers should be attached to the rack. In multiple rack in-
stallations, the racks should be coupled together.
• Always make sure the rack is stable before extending a server or other component from
the rack.
• You should extend only one server or 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 Appendix A.
• Determine the placement of each component in the rack before you install the rails.
• 
way up.
• Use a regulating uninterruptible power supply (UPS) to protect the server from power
surges and voltage spikes and to keep your system operating in case of a power failure.
• Allow any drives and power supply modules to cool before touching them.
• When not servicing, always keep the front door of the rack and all covers/panels on the
servers closed to maintain proper cooling.
Rack Mounting Considerations
Ambient Operating Temperature
If installed in a closed or multi-unit rack assembly, the ambient operating temperature of
the rack environment may be greater than the room's ambient temperature. Therefore,
consideration should be given to installing the equipment in an environment compatible with
the manufacturer’s maximum rated ambient temperature (TMRA).
Airow
               
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.

Chapter 2: Server Installation
19
Circuit Overloading
Consideration should be given to the connection of the equipment to the power supply circuitry
󰀨
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 connections other than the
direct connections to the branch circuit (i.e. the use of power strips, etc.).

special precautions to ensure that the system remains stable. The following guidelines
are provided to ensure your safety:
• This unit should be mounted at the bottom of the rack if it is the only unit in the rack.
• 
with the heaviest component at the bottom of the rack.
• If the rack is provided with stabilizing devices, install the stabilizers before mounting or
servicing the unit in the rack.
• Slide rail mounted equipment is not to be used as a shelf or a work space.

A+ Server AS -1124US-TNRP User's Manual
20
2.3 Installing the Rails
󰀨
procedure. 
The following is a basic guideline for installing the system into a rack with the rack mounting
hardware provided. You should also refer to the installation instructions that came with the

If you are installing into a two-post "telco" rack, skip to that section later in this chapter.
Identifying the Rails
The chassis comes with two sets of rack rails, one set for the right side of the chassis and
one for the left. Each set consists of an inner rail that is pre-attached to the chassis, an outer
rail that attaches to the rack, and a middle rail that slides forward in the outer rail.
Figure 2-1. Identifying the Sections of the Rack Rails
Note󰀨
Rails, from BOM:
MCP-290-00102-0N Outer rail (quick) for 1U 17.2"W chass 2
MCP-290-00112-0N Inner rail, extension, long (quick) for 1U 17.2"W chass 2
MCP-290-00120-0N* Inner rail, front, quick-release type (thumb screw appiled) 2
MCP-290-00062-0N per Joe Tsai, 5/26 (1029U-Txxx)
Middle Rail (not shown)--
slides forward from the
outer rail
Inner Rail--
pre-attached to
the chassis
Outer Rail,
Front and Rear
Brackets