Supermicro Supero 6016T-6F User manual

®
SUPERSERVER
6016T-6F
SUPER
USER’S MANUAL
1.0a

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 1.0a
Release Date: February 20, 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 6016T-6F. Instal-
lation and maintainance 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 X8DT6-F serverboard and
the SC815TQ-563CB chassis.
Chapter 2: Server Installation
This chapter describes the steps necessary to install the SuperServer 6016T-6F 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 6016T-6F.

SUPERSERVER 6016T-6F User's Manual
iv
Chapter 5: Advanced Serverboard Setup
Chapter 5 provides detailed information on the X8DT6-F 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 reconfiguring the
serverboard.
Chapter 6: Advanced Chassis Setup
Refer to Chapter 6 for detailed information on the SC815TQ-563CB server chassis.
You should follow the procedures given in this chapter when installing, removing
or reconfiguring SAS/SATA 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 Error Beep Codes
Appendix B: Installing Windows
Appendix C: System Specifications

Notes
Preface
v

vi
Table of Contents
Chapter 1 Introduction
1-1 Overview .........................................................................................................1-1
1-2 Serverboard Features..................................................................................... 1-2
Processors ......................................................................................................1-2
Memory ...........................................................................................................1-2
SAS ................................................................................................................1-2
Serial ATA ....................................................................................................... 1-2
PCI Expansion Slots....................................................................................... 1-2
Onboard Controllers/Ports .............................................................................. 1-3
Graphics Controller......................................................................................... 1-3
Other Features................................................................................................1-3
1-3 Server Chassis Features ................................................................................1-3
System Power................................................................................................. 1-3
SAS/SATA Subsystem.....................................................................................1-3
Front Control Panel.........................................................................................1-3
I/O Backplane.................................................................................................. 1-4
Cooling System...............................................................................................1-4
1-4 Contacting Supermicro....................................................................................1-6
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............................................................................. 2-2
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
SUPERSERVER 6016T-6F User's Manual

vii
Installing the Server into the Rack.................................................................. 2-6
Installing the Server into a Telco Rack........................................................... 2-7
2-6 Checking the Serverboard Setup.................................................................... 2-8
2-7 Checking the Drive Bay Setup........................................................................ 2-9
Chapter 3 System Interface
3-1 Overview .........................................................................................................3-1
3-2 Control Panel Buttons..................................................................................... 3-1
3-3 Control Panel LEDs ........................................................................................ 3-2
3-4 Hard 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 .......................................................................................................5-2
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
Installing an LGA1366 Processor ...................................................................5-5
Installing the Heatsink.....................................................................................5-7
Removing the Heatsink................................................................................... 5-7
Table of Contents

viii
5-6 Installing Memory............................................................................................5-8
Memory Support..............................................................................................5-8
DIMM Installation ............................................................................................ 5-8
5-7 Adding PCI Expansion Cards .......................................................................5-10
5-8 Serverboard Details .......................................................................................5-11
X8DT6-F Quick Reference............................................................................ 5-12
5-9 Connector Definitions ...................................................................................5-13
5-10 Jumper Settings............................................................................................ 5-19
5-11 Onboard Indicators........................................................................................5-21
5-12 Floppy, SAS and SATA Ports........................................................................ 5-22
5-13 Installing Software.........................................................................................5-23
SuperDoctor III..............................................................................................5-24
5-14 Onboard Battery............................................................................................5-25
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
6-4 Drive Bay Installation/Removal.......................................................................6-4
Removing the Front Bezel..............................................................................6-4
Accessing the Drive Bays............................................................................... 6-5
Hard Drive Installation.....................................................................................6-6
DVD-ROM Drive Installation ...........................................................................6-8
6-5 Power Supply..................................................................................................6-9
Power Supply Failure................................................................................. 6-9
Chapter 7 BIOS
7-1 Introduction...................................................................................................... 7-1
7-2 Main Setup...................................................................................................... 7-2
7-3 Advanced Setup Configurations......................................................................7-4
7-4 Security Settings........................................................................................... 7-22
7-5 Boot Configuration ........................................................................................ 7-24
7-6 Exit Options...................................................................................................7-26
7-7 BIOS Recovery ............................................................................................. 7-27
Appendix A BIOS Error Beep Codes
Appendix B Installing Windows
Appendix C System Specifications
SUPERSERVER 6016T-6F User's Manual

Chapter 1
Introduction
1-1 Overview
The SuperServer 6016T-6F is a high-end server comprised of two main subsys-
tems: the SC815TQ-563CB 1U server chassis and the X8DT6-F 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 6016T-6F, as listed below:
• Two passive CPU heatsinks (SNK-P0037P)
• One slim DVD-ROM drive (DVM-TEAC-DVD-SBT)
• Four counter-rotating fans (FAN-0086L4)
• One air shroud (MCP-310-18002-0N)
• One riser card for PCI-E x8 expansion card (CSE-RR1U-E8)
• SAS/SATA Accessories
One SAS/SATA backplane (BPN-SAS-815TQ)
One iPass to 4-connector SATA cable (CBL-0176L-01)
Four drive carriers (MCP-220-00024-0B)
• One rackmount kit (CSE-PT51)
• One CD containing drivers and utilities
• SuperServer 6016T-6F User's Manual
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 6016T-6F User's Manual
1-2 Serverboard Features
The SuperServer 6016T-6F is built around the X8DT6-F, a dual processor
serverboard based on the Intel IOH-36D + ICH10R chipset and designed to provide
maximum performance. Below are the main features of the X8DT6-F. (See Figure
1-1 for a block diagram of the chipset).
Processors
The X8DT6-F supports single or dual Intel® Xeon 5600/5500 Series processors.
Please refer to the serverboard description pages on our web site for a complete
listing of supported processors (www.supermicro.com).
Memory
The X8DT6-F has twelve DIMM slots that can support up to 192 GB of ECC regis-
teredDDR3-1333/1066/800or upto 48 GBof ECCunbufferedDDR3-1333/1066/800
SDRAM. Memory mirroring is supported. See Chapter 5 for details.
SAS
An LSI 2008 SAS controller is integrated into the serverboard to support eight SAS2
ports, which are RAID 0, 1 and 10 capable. The SAS drives are hot-swappable
units. SAS RAID 5 is also supported with the AOC-SAS2-RAID5-KEY (optional)
installed on the serverboard.
Note: The operating system you use must have RAID support to enable the hot-
swap capability and RAID function of the SAS drives.
Serial ATA
A Serial ATA controller is integrated into the ICH10R (South Bridge) portion of the
IOH-36D chipset to provide a six-port 3 Gb/s SATA subsystem, which is RAID 0, 1,
10 and 5 supported. The SATA 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 SATA drives. RAID 5 requires the use
of an iButton.
PCI Expansion Slots
The X8DT6-F has three PCI-Express 2.0 x8 slots, one PCI-Express 2.0 x4 slot and
one PCI-Express x4 slot. For the 6016T-6F server, one PCI-Express x8 add-on card
is supported with the use of a riser card (included).

1-3
Chapter 1: Introduction
Onboard Controllers/Ports
A floppy drive connector is included on the serverboard. The color-coded I/O ports
include one COM port (an additional COM header is located on the serverboard),
a VGA (monitor) port, two USB 2.0 ports (additional USB headers are included on
the serverboard), PS/2 mouse and keyboard ports, two gigabit Ethernet ports and
a dedicated IPMI LAN port.
Graphics Controller
The X8DT6-F features an integrated Matrox G200eW video controller. The G200eW
is a 2D/3D/video accelerator chip with a 128-bit core.
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 following is a general outline of the main features of the SC815TQ-563CB
server chassis. Details on the chassis and on servicing procedures can be found
in Chapter 6.
System Power
The SC815TQ-563CB features a single 560W power supply module. The system
must be shut down when replacing or removing this power supply module.
SAS/SATA Subsystem
The SC815TQ-563CB supports up to four SAS or SATA drives. These 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 SAS/SATA drives.
Front Control Panel
The control panel on the SuperServer 6016T-6F provides you with system monitor-
ing and control. LEDs indicate system power, HDD activity, network activity (two)
and overheat/fan fail. A main power button and a system reset button are also
included.

1-4
SUPERSERVER 6016T-6F User's Manual
I/O Backplane
The SC815TQ-563CB is an extended ATX form factor chassis that is designed to
be used in a 1U rackmount configuration. The I/O backplane provides one COM
port, a VGA port, two USB 2.0 ports, PS/2 mouse and keyboard ports, two gigabit
Ethernet ports and one dedicated IPMI LAN port.
Cooling System
The SC815TQ-563CB chassis has an innovative cooling design that features four
sets of 4-cm counter-rotating fans located in the middle section of the chassis. There
is a "Fan Speed Control Mode" setting in BIOS that allows chassis fan speed to
be determined by system temperature. The power supply module also includes a
cooling fan.

1-5
Chapter 1: Introduction
Figure 1-1. Intel IOH-36D/ICH10R Chipset:
System Block Diagram
Note: This is a general block diagram. Please see Chapter 5 for details.
PCI-33
PCI-E x8
LANE6
COM2
PCI-E x8
USB 2.0
3.0 Gb/S
Ports
Ports
#0
CPU #2
Intel ICH10R
PCI-E x8
DMI
LANE5
LANE 1/2/3/4
SPI
PCI-E x4
LPC
SIO
W83627
PCI 33MHz
#7-10
CPU #1
QPI
HG
USB
PCIE x4
SATA
#1-2
#6
#5
Intel
IOH-36D
VRD VRD #0-4
#0-3
#0-2
#0-1
DDR3
#1-4
#1-3
#1-2
#1-1
800/1066/1333
800/1066/1333
DDR3
ESI
#1-5
#1-6
#0-5
#0-6
QPI
QPI
#3
TPM
PCI-33
#1
KB
MS COM1
PCI-E x16/8
#4
x16 Slot
#3-4
PCI-E x4
LAN#1
PCI-E x16
PCI-E x8
Ports#4~7
SAS
LSI 2008
B3
Ports#0~3
LAN#2
82576EB
PCI-E x4
#2
PCI-E x8
#5-6
SPEC
BMC WPCM450
#7
Port
Port
#8
(Optional)
6 PHASE 6 PHASE
Option Ports
Ports Port
82576EB

1-6
SUPERSERVER 6016T-6F User's Manual
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]

Chapter 2: Server Installation
2-1
Chapter 2
Server Installation
2-1 Overview
This chapter provides a quick setup checklist to get your SuperServer 6016T-6F 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 6016T-6F 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 6016T-6F. 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 Pre-
cautions in the next section.
2-3 Preparing for Setup
The box the SuperServer 6016T-6F 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 6016T-6F 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) 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
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.

Chapter 2: Server Installation
2-3
• 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.
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 6016T-6F User's Manual
2-5 Installing the System into a Rack
This section provides information on installing the 6016T-6F 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
(right side rail shown)

Chapter 2: Server Installation
2-5
Installing the Outer Rails
Begin by measuring the distance from the front rail to the rear rail of the rack.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. Adjust both the short and long brackets to the proper
distance so that the rail can fit snugly into the rack. Secure the short bracket to the
front side of the outer rail with two screws and the long bracket to the rear side of
the outer rail with three screws. 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
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.

2-6
SUPERSERVER 6016T-6F User's Manual
Figure 2-3. Installing the Server into a Rack
Installing the Server into the Rack
You should now have rails attached to both the chassis and the rack unit. The next
step is to install the server into the rack. Do this by lining up the rear of the chassis
rails with the front of the rack rails. 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). See Figure 2-3.
When the server has been pushed completely into the rack, you should hear the
locking tabs "click".
Warning: do not pick up the server with the front handles. They are de-
signed to pull the system from a rack only.