Dell EMC PowerEdge R740 Manual

Dell EMC PowerEdge R740
Installation and Service Manual
Regulatory Model: E38S Series
Regulatory Type: E38S001

Notes, cautions, and warnings
NOTE: A NOTE indicates important information that helps you make better use of your product.
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.
WARNING: A WARNING indicates a potential for property damage, personal injury, or death.
Copyright ©2017 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other
trademarks may be trademarks of their respective owners.
2017 - 12
Rev. A03

Contents
1 PowerEdge R740 system overview.................................................................................................................8
Supported congurations..................................................................................................................................................8
Front view of the system.................................................................................................................................................10
Left control panel view............................................................................................................................................... 11
Right control panel view............................................................................................................................................ 15
Back view of the system................................................................................................................................................. 16
NIC indicator codes.................................................................................................................................................... 17
Power supply unit indicator codes............................................................................................................................18
Drive indicator codes.......................................................................................................................................................20
LCD panel.......................................................................................................................................................................... 21
Viewing Home screen................................................................................................................................................22
Setup menu................................................................................................................................................................ 22
View menu.................................................................................................................................................................. 22
Locating Service Tag of your system.............................................................................................................................23
2 Documentation resources............................................................................................................................ 24
3 Technical specications............................................................................................................................... 26
System dimensions.......................................................................................................................................................... 26
Chassis weight..................................................................................................................................................................27
Processor specications................................................................................................................................................. 28
PSU specications...........................................................................................................................................................28
System battery specications........................................................................................................................................ 29
Expansion bus specications..........................................................................................................................................29
Memory specications.................................................................................................................................................... 30
Storage controller specications....................................................................................................................................30
Drive specications...........................................................................................................................................................31
Drives........................................................................................................................................................................... 31
Optical drive................................................................................................................................................................ 31
Ports and connectors specications.............................................................................................................................. 31
USB ports.................................................................................................................................................................... 31
NIC ports......................................................................................................................................................................31
VGA ports................................................................................................................................................................... 32
Serial connector......................................................................................................................................................... 32
Internal Dual SD Module or vFlash card..................................................................................................................32
Video specications.........................................................................................................................................................32
Environmental specications.......................................................................................................................................... 33
Standard operating temperature..............................................................................................................................34
Expanded operating temperature............................................................................................................................ 34
Particulate and gaseous contamination specications..........................................................................................36
4 Initial system setup and conguration.......................................................................................................... 37
Contents 3

Setting up your system....................................................................................................................................................37
iDRAC conguration.........................................................................................................................................................37
Options to set up iDRAC IP address........................................................................................................................ 37
Log in to iDRAC..........................................................................................................................................................38
Options to install the operating system.........................................................................................................................38
Methods to download rmware and drivers...........................................................................................................39
Downloading drivers and rmware.......................................................................................................................... 39
5 Pre-operating system management applications..........................................................................................40
Options to manage the pre-operating system applications........................................................................................40
System Setup...................................................................................................................................................................40
Viewing System Setup............................................................................................................................................... 41
System Setup details..................................................................................................................................................41
System BIOS...............................................................................................................................................................42
iDRAC Settings utility.................................................................................................................................................61
Device Settings.......................................................................................................................................................... 62
Dell Lifecycle Controller...................................................................................................................................................62
Embedded system management............................................................................................................................. 62
Boot Manager...................................................................................................................................................................62
Viewing Boot Manager..............................................................................................................................................62
Boot Manager main menu........................................................................................................................................ 63
One-shot BIOS boot menu.......................................................................................................................................63
System Utilities...........................................................................................................................................................63
PXE boot...........................................................................................................................................................................63
6 Installing and removing system components................................................................................................65
Safety instructions...........................................................................................................................................................65
Before working inside your system................................................................................................................................65
After working inside your system...................................................................................................................................65
Recommended tools........................................................................................................................................................66
Optional front bezel......................................................................................................................................................... 66
Removing the front bezel......................................................................................................................................... 66
Installing the optional front bezel............................................................................................................................. 67
System cover....................................................................................................................................................................68
Removing the system cover.....................................................................................................................................68
Installing the system cover....................................................................................................................................... 69
Backplane cover...............................................................................................................................................................70
Removing the backplane cover................................................................................................................................70
Installing the backplane cover................................................................................................................................... 71
Inside the system............................................................................................................................................................. 72
Air shroud.......................................................................................................................................................................... 74
Removing the air shroud........................................................................................................................................... 75
Installing the air shroud..............................................................................................................................................75
Cooling fan assembly.......................................................................................................................................................76
Removing the cooling fan assembly........................................................................................................................ 76
Installing the cooling fan assembly...........................................................................................................................77
4 Contents

Cooling fans...................................................................................................................................................................... 78
Removing a cooling fan............................................................................................................................................. 79
Installing a cooling fan............................................................................................................................................... 80
Intrusion switch................................................................................................................................................................80
Removing an intrusion switch................................................................................................................................... 81
Installing an intrusion switch......................................................................................................................................81
NVDIMM-N battery.........................................................................................................................................................82
Removing the NVDIMM-N battery from the air shroud....................................................................................... 82
Installing NVDIMM-N battery into air shroud.........................................................................................................83
Drives.................................................................................................................................................................................84
Removing a drive blank............................................................................................................................................. 84
Installing a drive blank................................................................................................................................................85
Removing a drive carrier........................................................................................................................................... 86
Installing a drive carrier..............................................................................................................................................87
Removing a 2.5 inch drive from the 3.5 inch drive adapter..................................................................................88
Installing a 2.5 inch drive into the 3.5 inch drive adapter......................................................................................88
Removing a 3.5 inch adapter from a 3.5 inch drive carrier...................................................................................89
Installing a 3.5 inch adapter into a 3.5 inch drive carrier.......................................................................................90
Removing the drive from the drive carrier.............................................................................................................. 91
Installing a drive into the drive carrier......................................................................................................................92
System memory............................................................................................................................................................... 93
General memory module installation guidelines......................................................................................................95
NVDIMM-N memory module installation guidelines .............................................................................................95
Mode-specic guidelines.......................................................................................................................................... 95
Removing a memory module.................................................................................................................................... 97
Installing a memory module...................................................................................................................................... 98
Processors and heat sinks.............................................................................................................................................. 99
Removing a processor and heat sink module.........................................................................................................99
Removing the processor from the processor and heat sink module................................................................. 100
Installing the processor into a processor and heat sink module......................................................................... 102
Installing a processor and heat sink module..........................................................................................................104
Expansion cards and expansion card risers.................................................................................................................105
Expansion card installation guidelines.................................................................................................................... 106
Opening and closing the PCIe card holder latch.................................................................................................. 109
Removing the expansion card from expansion card riser.....................................................................................110
Installing expansion card into expansion card riser................................................................................................113
Removing riser 2 and 3 blank...................................................................................................................................115
Installing riser 2 and 3 blank.....................................................................................................................................116
Removing riser 3 blank..............................................................................................................................................117
Installing riser 3 blank................................................................................................................................................118
Removing expansion card riser 1............................................................................................................................. 119
Installing expansion card riser 1...............................................................................................................................120
Removing expansion card riser 2.............................................................................................................................121
Installing expansion card riser 2.............................................................................................................................. 122
Removing expansion card riser 3............................................................................................................................124
Contents 5

Installing expansion card riser 3.............................................................................................................................. 125
GPU card installation guidelines..............................................................................................................................125
Removing a GPU...................................................................................................................................................... 126
Installing a GPU.........................................................................................................................................................128
IDSDM/vFlash card (optional)......................................................................................................................................134
Removing the micro SD card.................................................................................................................................. 134
Installing the micro SD card.....................................................................................................................................134
Removing the optional IDSDM/vFlash card..........................................................................................................135
Installing the optional IDSDM/vFlash card............................................................................................................136
Network daughter card..................................................................................................................................................137
Removing the network daughter card................................................................................................................... 137
Installing the network daughter card..................................................................................................................... 138
Integrated storage controller card................................................................................................................................139
Removing integrated storage controller card........................................................................................................139
Installing integrated storage controller card...........................................................................................................141
Drive backplane...............................................................................................................................................................142
Drive backplane connectors....................................................................................................................................142
Removing drive backplane.......................................................................................................................................143
Installing drive backplane ........................................................................................................................................144
Cable routing.............................................................................................................................................................146
System battery............................................................................................................................................................... 152
Replacing the system battery................................................................................................................................. 152
USB 3.0 module..............................................................................................................................................................153
Removing USB 3.0 module......................................................................................................................................154
Installing USB 3.0 module........................................................................................................................................155
Internal USB memory key (optional)............................................................................................................................156
Replacing optional internal USB memory key....................................................................................................... 156
Optical drive (optional).................................................................................................................................................. 156
Removing the optional optical drive.......................................................................................................................156
Installing the optional optical drive......................................................................................................................... 157
Power supply units......................................................................................................................................................... 158
Hot spare feature..................................................................................................................................................... 159
Removing a power supply unit blank......................................................................................................................159
Installing a power supply unit blank........................................................................................................................160
Removing a power supply unit................................................................................................................................160
Installing a power supply unit...................................................................................................................................161
Wiring instructions for a DC power supply unit.................................................................................................... 162
System board..................................................................................................................................................................164
Removing system board.......................................................................................................................................... 164
Installing system board............................................................................................................................................ 165
Trusted Platform Module...............................................................................................................................................168
Replacing the Trusted Platform Module................................................................................................................168
Initializing TPM for BitLocker users....................................................................................................................... 169
Initializing the TPM 1.2 for TXT users....................................................................................................................169
Initializing the TPM 2.0 for TXT users................................................................................................................... 169
6 Contents

Control panel...................................................................................................................................................................169
Removing the left control panel..............................................................................................................................170
Installing the left control panel................................................................................................................................170
Removing the right control panel............................................................................................................................171
Installing the right control panel..............................................................................................................................172
7 Using system diagnostics............................................................................................................................174
Dell Embedded System Diagnostics............................................................................................................................. 174
Running the Embedded System Diagnostics from Boot Manager..................................................................... 174
Running the Embedded System Diagnostics from the Dell Lifecycle Controller.............................................. 174
System diagnostic controls..................................................................................................................................... 175
8 Jumpers and connectors ............................................................................................................................176
System board jumpers and connectors........................................................................................................................177
System board jumper settings...................................................................................................................................... 179
Disabling forgotten password........................................................................................................................................179
9 Getting help................................................................................................................................................ 181
Contacting Dell................................................................................................................................................................ 181
Documentation feedback............................................................................................................................................... 181
Accessing system information by using QRL...............................................................................................................181
Quick Resource Locator for PowerEdge R740 and R740xd systems................................................................182
Receiving automated support with SupportAssist ....................................................................................................182
Contents 7

PowerEdge R740 system overview
The PowerEdge R740 is a 2U rack server that supports up to:
• Two Intel Xeon Processor Scalable Family processors
• 24 DIMM slots supporting up to 1536 GB of memory
• Two AC or DC power supply units
• 16 SAS, SATA, Nearline SAS hard drives or SSDs. For more information about supported drives, see the Technical specications section.
NOTE: All instances of SAS, SATA hard drives, NVMe and SSDs are referred to as drives in this document, unless specied
otherwise.
Topics:
• Supported congurations
• Front view of the system
• Back view of the system
• Drive indicator codes
• LCD panel
• Locating Service Tag of your system
Related link
Technical specications
Supported congurations
The PowerEdge R740 system supports the following congurations:
1
8 PowerEdge R740 system overview

Figure 1. Supported congurations
PowerEdge R740 system overview 9

Front view of the system
The front view displays the features available on the front of the system.
Figure 2. Front view of 16 x 2.5 inch drive system
Figure 3. Front view of 8 x 2.5 inch drive system
Figure 4. Front view of 8 x 3.5 inch drive system
10 PowerEdge R740 system overview

Table 1. Features available on the front of the system
Item Ports, panels and slots Icon Description
1 Left control panel N/A Contains system health and system ID, status LED and optional
iDRAC Quick Sync 2 (wireless).
2 Drives N/A Enable you to install drives that are supported on your system. For
more information about drives, see the Technical specications
section.
3 Optical drive (optional) N/A Enables you to retrieve and store data on optical discs such as
compact discs (CD) and digital versatile discs (DVD). For more
information, see the Technical specications section.
4 USB 3.0 port (optional) The USB ports are 9-pin, 3.0-compliant. These ports enable you to
connect USB devices to the system.
5 Right control panel N/A Contains the power button, VGA port, iDRAC Direct micro USB port,
and two USB 2.0 ports.
6 Information tag N/A The Information Tag is a slide-out label panel that contains system
information such as Service Tag, NIC, MAC address, and so on. If you
have opted for the secure default access to iDRAC, the Information
tag also contains the iDRAC secure default password.
Related link
Technical specications
Left control panel view
Figure 5. Left control panel view
PowerEdge R740 system overview 11

Table 2. Left control panel features
Item Indicator, button, or
connector
Icon Description
1 Status LED indicators N/A Indicate the status of the system. For more information, see the
Status LED indicators section.
2 System health and system
ID indicator
Indicates the system health. For more information, see the System
health and system ID indicator codes section.
3 iDRAC Quick Sync 2
wireless indicator
(optional)
Indicates if the iDRAC Quick Sync 2 wireless option is activated. The
Quick Sync 2 feature allows management of the system using mobile
devices. This feature aggregates hardware/rmware inventory and
various system level diagnostic/error information that can be used in
troubleshooting the system. You can access system inventory, Dell
Lifecycle Controller logs or system logs, system health status, and
also congure iDRAC, BIOS, and networking parameters. You can also
launch the virtual Keyboard, Video, and Mouse (KVM) viewer and
virtual Kernel based Virtual Machine (KVM), on a supported mobile
device. For more information, see the Integrated Dell Remote Access
Controller User's Guide at Dell.com/idracmanuals.
Related link
Status LED indicators
System health and system ID indicator codes
Status LED indicators
NOTE: The status LED indicators are always o and only turns on to a solid amber if any error
occurs.
Table 3. Status LED indicators and descriptions
Icon Description Condition Corrective action
Drive indicator The indicator turns solid amber if
there is a drive error. • Check the System Event Log to determine if the drive
has an error.
• Run the appropriate Online Diagnostics test. Restart
the system and run embedded diagnostics (ePSA).
• If the drives are congured in a RAID array, restart the
system, and enter the host adapter conguration
utility program.
Temperature
indicator
The indicator turns solid amber if the
system experiences a thermal error
(for example, the ambient
temperature is out of range or there is
a fan failure).
Ensure that none of the following conditions exist:
• A cooling fan has been removed or has failed.
• System cover, air shroud, memory module blank, or
back ller bracket is removed.
• Ambient temperature is too high.
• External airow is obstructed.
If the problem persists, see the Getting help section.
Electrical indicator The indicator turns solid amber if the
system experiences an electrical error
(for example, voltage out of range, or
Check the System Event Log or system messages for the
specic issue. If it is due to a problem with the PSU,
check the LED on the PSU. Reseat the PSU. If the
problem persists, see the Getting help section.
12 PowerEdge R740 system overview

Icon Description Condition Corrective action
a failed power supply unit (PSU) or
voltage regulator).
Memory indicator The indicator turns solid amber if a
memory error occurs.
Check the System Event Log or system messages for the
location of the failed memory. Reseat the memory
module. If the problem persists, see the Getting help
section.
PCIe indicator The indicator turns solid amber if a
PCIe card experiences an error.
Restart the system. Update any required drivers for the
PCIe card. Reinstall the card. If the problem persists, see
the Getting help section.
NOTE: For more information about the
supported PCIe cards, see the Expansion card
installation guidelines section.
Related link
Getting help
Expansion card installation guidelines
System health and system ID indicator codes
The system health and system ID indicator is located on the left control panel of your system.
Figure 6. System health and system ID indicators
Table 4. System health and system ID indicator codes
System health and system ID indicator code Condition
Solid blue Indicates that the system is turned on, system is healthy, and system
ID mode is not active. Press the system health and system ID button
to switch to system ID mode.
Blinking blue Indicates that the system ID mode is active. Press the system health
and system ID button to switch to system health mode.
Solid amber Indicates that the system is in fail-safe mode. If the problem persists,
see the Getting help section.
Blinking amber Indicates that the system is experiencing a fault. Check the System
Event Log or the LCD panel, if available on the bezel, for specic error
message. For more information about error messages, see the Dell
Event and Error Messages Reference Guide at Dell.com/
openmanagemanuals > OpenManage software.
Related link
Getting help
PowerEdge R740 system overview 13

iDRAC Quick Sync 2 indicator codes
iDRAC Quick Sync 2 module (optional) is located on the left control panel of your system.
Figure 7. iDRAC Quick Sync 2 indicators
Table 5. iDRAC Quick Sync 2 indicators and descriptions
iDRAC Quick Sync 2 indicator
code
Condition Corrective action
O (default state) Indicates that the iDRAC Quick Sync 2
feature is turned o. Press the iDRAC Quick
Sync 2 button to turn on the iDRAC Quick
Sync 2 feature.
If the LED fails to turn on, reseat the left control panel
ex cable and check again. If the problem persists,
see the Getting help section.
Solid white Indicates that iDRAC Quick Sync 2 is ready
to communicate. Press the iDRAC Quick
Sync 2 button to turn o.
If the LED fails to turn o, restart the system. If the
problem persists, see the Getting help section.
Blinks white rapidly Indicates data transfer activity. If the indicator continues to blink indenitely, see the
Getting help section.
Blinks white slowly Indicates that rmware update is in
progress.
If the indicator continues to blink indenitely, see the
Getting help section.
Blinks white ve times rapidly and
then turns o
Indicates that the iDRAC Quick Sync 2
feature is disabled.
Check if iDRAC Quick Sync 2 feature is congured to
be disabled by iDRAC. If the problem persists, see the
Getting help section. For more information, see
Integrated Dell Remote Access Controller User's
Guide at Dell.com/idracmanuals or Dell
OpenManage Server Administrator User’s Guide at
Dell.com/openmanagemanuals.
Solid amber Indicates that the system is in fail-safe
mode.
Restart the system. If the problem persists, see the
Getting help section.
Blinking amber Indicates that the iDRAC Quick Sync 2
hardware is not responding properly.
Restart the system. If the problem persists, see the
Getting help section.
Related link
Getting help
14 PowerEdge R740 system overview

Right control panel view
Figure 8. Right control panel view
Table 6. Right control panel features
Item Indicator, button, or
connector
Icon Description
1 Power button Indicates if the system is turned on or o. Press the power button to
manually turn on or o the system.
NOTE: Press the power button to gracefully shut down an
ACPI-compliant operating system.
2 USB port (2) The USB ports are 4-pin, 2.0-compliant. These ports enable you to
connect USB devices to the system.
3 iDRAC Direct port The iDRAC Direct port is micro USB 2.0-compliant. This port enables
you to access the iDRAC Direct features. For more information, see
the iDRAC User’s Guide at Dell.com/idracmanuals.
4 iDRAC Direct LED N/A The iDRAC Direct LED indicator lights up to indicate that the iDRAC
Direct port is connected. For more information, see the iDRAC Direct
LED indicator codes section.
5 VGA port Enables you to connect a display device to the system. For more
information, see the Technical specications section.
Related link
iDRAC Direct LED indicator codes
Technical specications
iDRAC Direct LED indicator codes
The iDRAC Direct LED indicator lights up to indicate that the port is connected and is being used as a part of the iDRAC subsystem.
iDRAC Direct LED indicator is located below the iDRAC Direct port on the right control panel.
PowerEdge R740 system overview 15

You can congure iDRAC Direct by using a USB to micro USB (type AB) cable, which you can connect to your laptop or tablet. The
following table describes iDRAC Direct activity when the iDRAC Direct port is active:
Table 7. iDRAC Direct LED indicator codes
iDRAC Direct LED
indicator code
Condition
Solid green for two seconds Indicates that the laptop or tablet is connected.
Flashing green (on for two
seconds and o for two
seconds)
Indicates that the laptop or tablet connected is recognized.
Turns o Indicates that the laptop or tablet is unplugged.
Back view of the system
The back view of the system provides access to the features available on the back of the server.
Figure 9. Back view of three riser system
Table 8. Features available on the back view
Item Panels, ports and slots Icon Description
1 Full-height PCIe expansion
card slot (3)
N/A The PCIe expansion card slot (riser 1) connects up to three full-height
PCIe expansion cards to the system. For more information, see the
Expansion card installation guidelines section.
2 Half-height PCIe expansion
card slot
N/A The PCIe expansion card slot (riser 2) connects one half-height PCIe
expansion cards to the system. For more information, see the Expansion
card installation guidelines section.
3 Rear handle N/A The rear handle can be removed to enable any external cabling of PCIe
cards that are installed in the PCIe expansion card slot 6.
4 Full-height PCIe expansion
card slot (2)
N/A The PCIe expansion card slot (riser 2) connects up to two full-height
PCIe expansion cards to the system. For more information, see the
Expansion card installation guidelines section.
5 Full-height PCIe expansion
card slot (2)
N/A The PCIe expansion card slot (riser 3) connects up to two full-height
PCIe expansion cards to the system. For more information, see the
Expansion card installation guidelines section.
16 PowerEdge R740 system overview

Item Panels, ports and slots Icon Description
6 Power supply unit (2) N/A For more information, see the Technical specications section.
7 NIC ports The NIC ports that are integrated on the network daughter card (NDC)
provide network connectivity. For more information about the supported
congurations, see the Technical specications section.
8 USB port (2) The USB ports are 9-pin and 3.0-compliant. These ports enable you to
connect USB devices to the system.
9 VGA port Enables you to connect a display device to the system. For more
information, see the Technical specications section.
10 Serial port Enables you to connect a serial device to the system. For more
information, see the Technical specications section.
11 iDRAC9 dedicated port Enables you to remotely access iDRAC. For more information, see the
iDRAC User’s Guide at Dell.com/idracmanuals.
12 System identication button The System Identication (ID) button is available on the front and back of
the systems. Press the button to identify a system in a rack by turning on
the system ID button. You can also use the system ID button to reset
iDRAC and to access BIOS using the step through mode.
Related link
Expansion card installation guidelines
Technical specications
NIC indicator codes
Each NIC on the back panel has indicators that provide information about the activity and link status. The activity LED indicator indicates if
data is owing through the NIC, and the link LED indicator indicates the speed of the connected network.
Figure 10. NIC indicator codes
1 link LED indicator 2 activity LED indicator
Table 9. NIC indicator codes
Status Condition
Link and activity indicators are o The NIC is not connected to the network.
Link indicator is green and activity indicator is blinking green The NIC is connected to a valid network at its maximum port speed and
data is being sent or received.
Link indicator is amber and activity indicator is blinking
green
The NIC is connected to a valid network at less than its maximum port
speed and data is being sent or received.
PowerEdge R740 system overview 17

Status Condition
Link indicator is green and activity indicator is o The NIC is connected to a valid network at its maximum port speed and
data is not being sent or received.
Link indicator is amber and activity indicator is o The NIC is connected to a valid network at less than its maximum port
speed and data is not being sent or received.
Link indicator is blinking green and activity is o NIC identify is enabled through the NIC conguration utility.
Power supply unit indicator codes
AC power supply units (PSUs) have an illuminated translucent handle that serves as an indicator and DC PSUs have an LED that serves as
an indicator. The indicator shows whether power is present or a power fault has occurred.
Figure 11. AC PSU status indicator
1 AC PSU status indicator/handle
Table 10. AC PSU status indicator codes
Power indicator codes Condition
Green A valid power source is connected to the PSU and the PSU is operational.
Blinking amber Indicates a problem with the PSU.
Not illuminated Power is not connected to the PSU.
Blinking green When the rmware of the PSU is being updated, the PSU handle blinks green.
CAUTION: Do not disconnect the power cord or unplug the PSU when updating rmware. If
rmware update is interrupted, the PSUs do not function.
Blinking green and turns o When hot-plugging a PSU, the PSU handle blinks green ve times at a rate of 4 Hz and turns o. This
indicates a PSU mismatch with respect to eciency, feature set, health status, or supported voltage.
CAUTION: If two PSUs are installed, both the PSUs must have the same type of label; for
example, Extended Power Performance (EPP) label. Mixing PSUs from previous generations of
PowerEdge servers is not supported, even if the PSUs have the same power rating. This results
in a PSU mismatch condition or failure to turn the system on.
CAUTION: When correcting a PSU mismatch, replace only the PSU with the blinking indicator.
Swapping the PSU to make a matched pair can result in an error condition and unexpected
system shutdown. To change from a high output conguration to a low output conguration or
vice versa, you must turn o the system.
18 PowerEdge R740 system overview

Power indicator codes Condition
CAUTION: AC PSUs support both 240 V and 120 V input voltages with the exception of Titanium
PSUs, which support only 240 V. When two identical PSUs receive dierent input voltages, they
can output dierent wattages, and trigger a mismatch.
CAUTION: If two PSUs are used, they must be of the same type and have the same maximum
output power.
CAUTION: Combining AC and DC PSUs is not supported and triggers a mismatch.
Figure 12. DC PSU status indicator
1 DC PSU status indicator
Table 11. DC PSU status indicator codes
Power indicator codes Condition
Green A valid power source is connected to the PSU and the PSU is operational.
Blinking amber Indicates a problem with the PSU.
Not illuminated Power is not connected to the PSU.
Blinking green When hot-plugging a PSU, the PSU indicator blinks green. This indicates that there is a PSU mismatch
with respect to eciency, feature set, health status, or supported voltage.
CAUTION: If two PSUs are installed, both the PSUs must have the same type of label; for
example, Extended Power Performance (EPP) label. Mixing PSUs from previous generations
of PowerEdge servers is not supported, even if the PSUs have the same power rating. This
results in a PSU mismatch condition or failure to turn the system on.
CAUTION: When correcting a PSU mismatch, replace only the PSU with the blinking
indicator. Swapping the PSU to make a matched pair can result in an error condition and
unexpected system shutdown. To change from a High Output conguration to a Low Output
conguration or vice versa, you must turn o the system.
CAUTION: If two PSUs are used, they must be of the same type and have the same
maximum output power.
CAUTION: Combining AC and DC PSUs is not supported and triggers a mismatch.
PowerEdge R740 system overview 19

Drive indicator codes
Each drive carrier has an activity LED indicator and a status LED indicator. The indicators provide information about the current status of
the drive. The activity LED indicator indicates whether the drive is currently in use or not. The status LED indicator indicates the power
condition of the drive.
Figure 13. Drive indicators
1 Drive activity LED indicator 2 Drive status LED indicator
3 Drive
NOTE: If the drive is in the Advanced Host Controller Interface (AHCI) mode, the status LED indicator does not turn on.
Table 12. Drive indicator codes
Drive status indicator code Condition
Flashes green twice per second Identifying drive or preparing for removal.
O Drive ready for removal.
NOTE: The drive status indicator remains o until all drives are
initialized after the system is turned on. Drives are not ready
for removal during this time.
Flashes green, amber, and then turns o Predicted drive failure.
Flashes amber four times per second Drive failed.
Flashes green slowly Drive rebuilding.
Solid green Drive online.
Flashes green for three seconds, amber for three seconds, and
then turns o after six seconds
Rebuild stopped.
20 PowerEdge R740 system overview