Supero SuperServer 6017R-72RFTP User manual

SUPERSERVER
6017R-72RFTP
SUPER ®
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.
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 docu-
mentation, 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 WILLSUPERMICRO 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, SUPERMICRO SHALL NOT HAVE LIABILITY FOR ANY
HARDWARE, SOFTWARE, OR DATASTORED 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. Super Micro'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
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 a commercial environ-
ment. 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 warn-
ing 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: Handling of lead solder materials used in this
product may expose you to lead, a chemical known to the
State of California to cause birth defects and other repro-
ductive harm.
Manual Revision 1.0
Release Date: January 18, 2013
Unless you request and receive written permission from Super Micro Computer, Inc., you may not
copy any part of this document.
Information in this document is subject to change without notice. Other products and companies
referred to herein are trademarks or registered trademarks of their respective companies or mark
holders.
Copyright © 2013 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 6017R-72RFTP.
Installation and maintenance should be performed by experienced technicians only.
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 serverboard and the chassis.
Chapter 2: Server Installation
This chapter describes the steps necessary to install the SuperServer into a rack and
check out the server configuration prior to powering up the system. If your server
was ordered without processor and memory components, 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.
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 6017R-72RFTP.
Chapter 5: Advanced Serverboard Setup
Chapter 5 provides detailed information on the X9DRW-7TPF serverboard, includ-
ing 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.

SUPERSERVER 6017R-72RFTP User's Manual
iv
Chapter 6: Advanced Chassis Setup
Refer to Chapter 6 for detailed information on the SC819TQ-R700WB server chas-
sis. You should follow the procedures given in this chapter when installing, removing
or reconfiguring SAS or peripheral drives and when replacing system power supply
modules 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 Error Beep Codes
Appendix B: System Specifications

v
Preface
Notes

vi
SUPERSERVER 6017R-72RFTP User's Manual
Table of Contents
Chapter 1 Introduction
1-1 Overview .........................................................................................................1-1
1-2 Serverboard Features..................................................................................... 1-2
Processors ......................................................................................................1-2
Memory ...........................................................................................................1-2
Onboard SAS..................................................................................................1-2
Onboard Serial ATA ........................................................................................1-2
Rear I/O Ports.................................................................................................1-2
Graphics Controller......................................................................................... 1-3
1-3 Server Chassis Features ................................................................................1-3
System Power.................................................................................................1-3
Hard Drives.....................................................................................................1-3
PCI Expansion Slots....................................................................................... 1-3
Front Control Panel.........................................................................................1-3
Cooling System...............................................................................................1-3
1-4 Contacting Supermicro....................................................................................1-5
Chapter 2 Server Installation
2-1 Overview .........................................................................................................2-1
2-2 Unpacking the System.................................................................................... 2-1
2-3 Preparing for Setup.........................................................................................2-1
Choosing a Setup Location............................................................................. 2-1
2-4 Warnings and Precautions..............................................................................2-2
Rack Precautions............................................................................................2-2
Server Precautions..........................................................................................2-2
Rack Mounting Considerations.......................................................................2-3
Ambient Operating Temperature................................................................2-3
Reduced Airflow .........................................................................................2-3
Mechanical Loading ................................................................................... 2-3
Circuit Overloading.....................................................................................2-3
Reliable Ground ......................................................................................... 2-3
2-5 Installing the System into a Rack ...................................................................2-4
Identifying the Sections of the Rack Rails......................................................2-4
Installing the Inner Rails .................................................................................2-4
Installing the Outer Rails.................................................................................2-5
Installing the Server into a Telco Rack...........................................................2-6

vii
Table of Contents
Chapter 3 System Interface
3-1 Overview .........................................................................................................3-1
3-2 Control Panel Buttons..................................................................................... 3-1
UID..................................................................................................................3-1
Reset...............................................................................................................3-1
Power..............................................................................................................3-1
3-3 Control Panel LEDs ........................................................................................ 3-2
Information LED.............................................................................................. 3-2
NIC2................................................................................................................3-2
NIC1................................................................................................................3-2
HDD................................................................................................................. 3-2
Power..............................................................................................................3-3
3-4 Drive Carrier LEDs..........................................................................................3-3
Chapter 4 Standardized Warning Statements for AC Systems
4-1 About Standardized Warning Statements.......................................................4-1
Warning Definition........................................................................................... 4-1
Installation Instructions.................................................................................... 4-4
Circuit Breaker ................................................................................................ 4-5
Power Disconnection Warning........................................................................ 4-6
Equipment Installation.....................................................................................4-8
Restricted Area................................................................................................ 4-9
Battery Handling............................................................................................ 4-10
Redundant Power Supplies .......................................................................... 4-12
Backplane Voltage ........................................................................................ 4-13
Comply with Local and National Electrical Codes........................................4-14
Product Disposal...........................................................................................4-15
Hot Swap Fan Warning.................................................................................4-16
Power Cable and AC Adapter ...................................................................... 4-18
Chapter 5 Advanced Serverboard Setup
5-1 Handling the Serverboard............................................................................... 5-1
Precautions .....................................................................................................5-1
Unpacking .......................................................................................................5-1
5-2 Processor and Heatsink Installation................................................................5-2
Installing an LGA 2011 Processor...................................................................5-2
Removing the Heatsink................................................................................... 5-5
5-3 Connecting Cables..........................................................................................5-6
Connecting Data Cables................................................................................. 5-6
Connecting Power Cables .............................................................................. 5-6
Connecting the Control Panel......................................................................... 5-6

viii
SUPERSERVER 6017R-72RFTP User's Manual
5-4 I/O Ports.......................................................................................................... 5-7
5-5 Installing Memory............................................................................................5-8
5-6 Adding PCI Cards......................................................................................... 5-10
5-7 Serverboard Details .......................................................................................5-11
5-8 Connector Definitions.................................................................................... 5-14
5-9 Jumper Settings............................................................................................ 5-22
5-10 Onboard Indicators........................................................................................5-25
5-11 SAS/SATA Port Connections......................................................................... 5-27
5-12 Installing Software.........................................................................................5-28
SuperDoctor III..............................................................................................5-29
5-13 Onboard Battery............................................................................................5-31
Chapter 6 Advanced Chassis Setup
6-1 Static-Sensitive Devices..................................................................................6-1
Precautions .....................................................................................................6-1
6-2 Control Panel .................................................................................................. 6-2
6-3 System Fans................................................................................................... 6-3
System Fan Failure......................................................................................... 6-3
Air Shroud.......................................................................................................6-4
Hard Drive Installation.....................................................................................6-7
Hard Drive Backplane..................................................................................... 6-8
DVD-ROM Drive Installation ...........................................................................6-9
6-4 Power Supply................................................................................................6-10
Power Supply Failure.................................................................................... 6-10
Chapter 7 BIOS
7-1 Introduction...................................................................................................... 7-1
Starting BIOS Setup Utility..............................................................................7-1
How To Change the Configuration Data......................................................... 7-2
Starting the Setup Utility................................................................................. 7-2
7-2 Main Setup...................................................................................................... 7-2
7-3 Advanced Setup Configurations......................................................................7-4
7-4 Event Logs.................................................................................................... 7-27
7-5 IPMI............................................................................................................... 7-29
7-6 Boot............................................................................................................... 7-31
7-7 Security......................................................................................................... 7-32
7-8 Save & Exit...................................................................................................7-33
Appendix A BIOS Error Beep Codes
Appendix B System Specifications

Chapter 1
Introduction
1-1 Overview
The SuperServer 6017R-72RFTP is a high-end server comprised of two main sub-
systems: the SC819TQ-R700WB 1U server chassis and the X9DRW-7TPF dual
processor serverboard. Please refer to our web site for information on operating
systems that have been certified for use with the system (www.supermicro.com).
In addition to the serverboard and chassis, various hardware components have
been included with the 6017R-72RFTP, as listed below:
• One IPASS to 4 SATA Cable (CBL-0476L)
• Two passive CPU heatsinks (SNK-P0047PS)
• Six sets of 4-cm counter rotating fans (FAN-0101L4)
• One air shroud and one air baffle (MCP-310-19003-0N, MCP-310-19013-0B)
• Riser Cards: (see Section 5-6 for details)
One RSC-R1UW-2E16-O-P
One RSC-R1UW-E8R-O-P
• SAS/SATA Accessories
One SAS backplane (BPN-SAS-815TQ)
Four drive carriers (MCP-220-00075-0B)
• SuperServer 6017R-72RFTP Quick Reference Guide
Note: a complete list of safety warnings is provided on the Supermicro web site at
http://www.supermicro.com/about/policies/safety_information.cfm
Chapter 1: Introduction
1-1

1-2
SUPERSERVER 6017R-72RFTP User's Manual
1-2 Serverboard Features
At the heart of the SuperServer 6017R-72RFTP lies the X9DRW-7TPF, a dual pro-
cessor serverboard based on the Intel® C602 chipset. Below are the main features
of the serverboard. (See Figure 1-1 for a block diagram of the chipset).
Processors
The X9DRW-7TPF supports single or dual Intel® E5-2600 Series processors in
LGA2011 sockets. Please refer to our web site for a complete listing of supported
processors (www.supermicro.com).
Memory
The X9DRW-7TPF features 16 DIMM slots that can support up to 512 GB of ECC
DDR3-1600/1333/1066/800 RDIMM SDRAM or 128 GB ECC/non-ECC UDIMM type
memory. Please refer to Chapter 5 for installing memory.
Onboard SAS
A SAS controller is integrated into the chipset and provides eight SAS2 ports.
The hot-swap SAS drives are connected to a backplane that provides power, bus
termination and configuration settings. Unless otherwise stated, SAS is used in
this server by default.
Note:RAID 0, 1, 5, 6, 10, 50 and 60 is supported. Refer to the following ftp site
for setup guidelines: <ftp://ftp.supermicro.com/driver/SAS/LSI/LSI_SAS_EmbM-
RAID_SWUG.pdf>.
Onboard Serial ATA
A SATA controller is integrated into the chipset to provide a four-port SATA sub-
system. RAID 0, 1, 5 and 10 are supported.
Rear I/O Ports
The color-coded I/O ports include one COM port, a VGA (monitor) port, two USB
2.0 ports, PS/2 mouse and keyboard ports, two 1 Gb LAN ports, two 10Gb SFP+
LAN ports and one dedicated IPMI LAN port..

1-3
Chapter 1: Introduction
Graphics Controller
The X9DRW-7TPF features an integrated Matrox G200 graphics chip.
1-3 Server Chassis Features
The 6017R-72RFTP is built upon the SC819TQ-R700WB chassis. Details on the
chassis and on servicing procedures can be found in Chapter 6.The following is a
general outline of the main features of the chassis.
System Power
The SC819TQ-R700WB features two redundant 700W power supplies. The system
does not need to be shut down when replacing or removing a single power supply
module.
Hard Drives
The SC819TQ-R700WB chassis was designed to support four hot-swap SAS or
SATA hard drives.
PCI Expansion Slots
Two riser cards are included. The RSC-R1UW-2E16-O-P supports one standard
size PCI-E 3.0 x16 card and one standard size PCI-E 3.0 x8 card. The RSC-R1UW-
E8R-O-P supports one low-profile PCI-E 3.0 x8 add-on card. See our web site for
details (http://www.supermicro.com/products/nfo/UIO.cfm) and section 5-6 of this
manual for details.
Front Control Panel
The chassis' control panel provides you with system monitoring and control. LEDs
indicate system power, HDD activity, network activity (2), overheat/fan/power failure
and system information. A main power button and a UID button is also included.
Cooling System
The SC819TQ-R700WB has an innovative cooling design that features six sets of
4-cm counter-rotating fans located in the middle section of the chassis. Fan speed
may be determined by IPMI. The power supply module also includes a cooling fan.

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SUPERSERVER 6017R-72RFTP User's Manual
Figure 1-1. Intel C602 Chipset:
System Block Diagram
Note: This is a general block diagram. Please see Chapter 5 for details.
P0 P1
PE3 PE2 DMI
DDR3 DIMM
CPU2
F
ESocket 01
#2
#1
DDR3 DIMM
#2
#1
x16
x16
x8
x16
x16
#1~#8
#1~#6
#7~#10
x8 [7..0]
x8 [15..8]
x4
PE1
x8 Gen3
RJ45
CPU0
PE3
RJ45
VGA CONN
SFP+ Conn + Cage
SFP+ Conn + Cage
PHY1
RTL8201F
x16
CPU1
PE3
x16
CPU1
PE2
DDR3 DIMM
H
G
#2
#1
DDR3 DIMM
#2
#1
P1 P0
PE3 PE2 DMI
DMI
PCH C602/C602J
SPI
SATA
SCU
USB USB
LPC
PEG0
PEG1 [4:1]
PEG1_8
PCI
AT25321
BMC57810S
10G SFP+
Chipset
SAS2208
DDR3 DIMM
CPU1
D
CSocket 00
#2
#1
#2
#1
PE1
DDR3 DIMM
B
A
#2
#1
DDR3 DIMM
QPI QPI
#2
#1
USB
SATA
SAS
SATA
Powerville-2
L1/L2
REAR
HDR 2X5
0,1
TYPE-A
2,3 4,5 6
HDR 2X5
TPM
Header
WPCM450
VGA BMC
DDR2
BBU Conn
DDR3 DDR3 DDR3
DDR3 DDR3
DDR3 DIMM
Processor
E5-2600 Series
Processor
E5-2600 Series
to WIO
Left WIO
to WIO
x8
CPU0
PE2 [7..0]
x8
CPU1
PE1
Right WIO

1-5
Chapter 1: Introduction
1-4 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)
Web Site: 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)
Asia-Pacific
Address: Super Micro Computer, Inc.
4F, No. 232-1, Liancheng Rd
Chung-Ho Dist., New Taipei City 235
Taiwan
Tel: [phone]
Fax: [phone]
Web Site: www.supermicro.com.tw
Technical Support:
Email: [email protected]
Tel: [phone]

1-6
SUPERSERVER 6017R-72RFTP User's Manual
Notes

Chapter 2: Server Installation
2-1
Chapter 2
Server Installation
2-1 Overview
This chapter provides a quick setup checklist to get your 6017R-72RFTP 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 pre-installed. 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 6017R-72RFTP 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 6017R-72RFTP.
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. Be sure to read the Rack and Server
Precautions in the next section.
2-3 Preparing for Setup
The box the 6017R-72RFTP was shipped in should include two sets of rail assem-
blies, 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.
Choosing a Setup Location
• Leave enough clearance in front of the rack to enable you to open the front door
completely (~25 inches) and approximately 30 inches of clearance in the back
of the rack to allow for sufficient airflow and ease in servicing.This product is for

2-2
SUPERSERVER 6017R-72RFTP User's Manual
installation only in a Restricted Access Location (dedicated equipment rooms,
service closets and the like).
• This product is not suitable for use with visual display work place devices
acccording to §2 of the the German Ordinance for Work with Visual Display
Units.
2-4 Warnings and Precautions
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 si-
multaneously 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 SAS/SATA drives and power supply modules to cool before
touching them.
• Always keep the rack's front door and all panels and components on the servers
closed when not servicing to maintain proper cooling.

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.).
Warning! To prevent bodily injury when mounting or servicing this unit in a
rack, you must take 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.
• When mounting this unit in a partially filled rack, load the rack from the bottom
to the top 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.

2-4
SUPERSERVER 6017R-72RFTP User's Manual
2-5 Installing the System into a Rack
This section provides information on installing the 6017R-72RFTP into a rack unit
with the rack rails provided. If the system 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. 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 in the rack mounting kit. Each
assembly consists of two sections: an inner fixed chassis rail that secures directly
to the server chassis and an outer fixed rack rail that secures directly to the rack
itself (see Figure 2-1). Two pairs of short brackets to be used on the front side of
the outer rails are also included.
Installing the Inner Rails
Both the left and right side inner rails have been pre-attached to the chassis. Pro-
ceed to the next step.
Figure 2-1. Identifying the Sections of the Rack Rails
(left side rail shown)
Inner Rail Outer RailLocking Tab

Chapter 2: Server Installation
2-5
Installing the Outer Rails
Installing the Outer Rails to the Rack
1. Measure the distance from the front rail to the rear rail of the rack.
2. Attach a short bracket to the front side of the right outer rail and a long
bracket to the rear side of the right outer rail.
3. Adjust both the short and long brackets to the proper distance so that the rail
can fit snugly into the rack.
4. Secure the short bracket to the front side of the outer rail with two M4 screws
and the long bracket to the rear side of the outer rail with three M4 screws.
5. Repeat these steps for the left outer rail.
Locking Tabs
Both chassis rails have a locking tab, which serves two functions. The first is to
lock the server into place when installed and pushed fully into the rack, which is
its normal position. Secondly, these tabs also lock the server in place when fully
extended from the rack. This prevents the server from coming completely out of the
rack when you pull it out for servicing.
Figure 2-2. Installing the Rack Rails

2-6
SUPERSERVER 6017R-72RFTP User's Manual
Installing the Server into the Rack
Installing the Chassis into a Rack (Figure 2-3)
1. Confirm that chassis includes the inner rails and rail extensions . Also, confirm
that the outer rails are installed on the rack.
2. Line chassis rails with the front of the rack rails.
3. Slide the chassis rails into the rack rails, keeping the pressure even on both
sides (you may have to depress the locking tabs when inserting). When the
server has been pushed completely into the rack, you should hear the locking
tabs "click".
4. (Optional) Insert and tightening the thumbscrews that hold the front of the
server to the rack.
Installing the Server into a Telco Rack
To install the 6017R-72RFTP into a Telco type rack, use two L-shaped brackets on
either side of the chassis (four total). First, determine how far follow the server will
extend out the front of the rack. Larger chassis should be positioned to balance the
weight between front and back. If a bezel is included on your server, remove it. Then
attach the two front brackets to each side of the chassis, then the two rear brackets
positioned with just enough space to accommodate the width of the telco rack.
Finish by sliding the chassis into the rack and tightening the brackets to the rack.
Stability Hazard: The rack stabilizing mechanism must be in place, or the
rack must be bolted to the floor before you slide the unit out for servicing.
Failure to stabilize the rack can cause the rack to tip over.
Warning: do not pick up the server with the front handles. They are designed
to pull the system from a rack only.