Dell EMC PowerEdge R640 Manual

Dell EMC PowerEdge R640
Installation and Service Manual
Regulatory Model: E39S Series
Regulatory Type: E39S001

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 - 07
Rev. A00

Contents
1 PowerEdge R640 system overview................................................................................................................ 8
Supported congurations for PowerEdge R640............................................................................................................8
Front view of the system.................................................................................................................................................10
Left control panel view............................................................................................................................................... 11
Right control panel view............................................................................................................................................ 14
Back view of the system................................................................................................................................................. 16
NIC indicator codes.................................................................................................................................................... 17
Power supply unit indicator codes............................................................................................................................18
Hard drive indicator codes..............................................................................................................................................20
LCD panel.......................................................................................................................................................................... 21
Viewing Home screen.................................................................................................................................................21
Setup menu................................................................................................................................................................ 22
View menu.................................................................................................................................................................. 22
Locating Service Tag of your system.............................................................................................................................22
2 Documentation resources............................................................................................................................ 24
3 Technical specications............................................................................................................................... 26
System dimensions.......................................................................................................................................................... 27
Chassis weight................................................................................................................................................................. 28
Processor specications................................................................................................................................................. 28
PSU specications...........................................................................................................................................................28
System battery specications........................................................................................................................................ 28
Expansion bus specications..........................................................................................................................................29
Memory specications.................................................................................................................................................... 29
Storage controller specications....................................................................................................................................29
Hard drive specications.................................................................................................................................................29
Hard drives..................................................................................................................................................................29
Optical drive................................................................................................................................................................30
Ports and connectors specications............................................................................................................................. 30
USB ports................................................................................................................................................................... 30
NIC ports......................................................................................................................................................................31
Serial port.....................................................................................................................................................................31
VGA ports.................................................................................................................................................................... 31
IDSDM/vFlash card................................................................................................................................................... 32
Environmental specications.......................................................................................................................................... 32
Standard operating temperature..............................................................................................................................33
Expanded operating temperature............................................................................................................................ 34
Particulate and gaseous contamination specications..........................................................................................36
4 Initial system setup and conguration.......................................................................................................... 38
Setting up your system................................................................................................................................................... 38
Dell EMC PowerEdge R640 Installation and Service Manual
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iDRAC conguration........................................................................................................................................................ 38
Options to set up iDRAC IP address........................................................................................................................38
Log in to iDRAC..........................................................................................................................................................39
Options to install the operating system.........................................................................................................................39
Methods to download rmware and drivers...........................................................................................................39
Downloading drivers and rmware.......................................................................................................................... 40
5 Pre-operating system management applications.......................................................................................... 41
Options to manage the pre-operating system applications.........................................................................................41
System Setup....................................................................................................................................................................41
Viewing System Setup.............................................................................................................................................. 42
System Setup details.................................................................................................................................................42
System BIOS...............................................................................................................................................................43
iDRAC Settings utility................................................................................................................................................ 62
Device Settings.......................................................................................................................................................... 63
Dell Lifecycle Controller...................................................................................................................................................63
Embedded system management............................................................................................................................. 63
Boot Manager...................................................................................................................................................................63
Viewing Boot Manager..............................................................................................................................................63
Boot Manager main menu........................................................................................................................................ 64
One-shot BIOS boot menu.......................................................................................................................................64
System Utilities...........................................................................................................................................................64
PXE boot...........................................................................................................................................................................64
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
Front bezel (optional)...................................................................................................................................................... 66
Removing the optional 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..........................................................................................................................................................................75
Removing the air shroud........................................................................................................................................... 75
Installing the air shroud..............................................................................................................................................76
Cooling fans...................................................................................................................................................................... 77
Removing a cooling fan............................................................................................................................................. 77
Installing a cooling fan................................................................................................................................................78
System memory............................................................................................................................................................... 79
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General memory module installation guidelines.......................................................................................................81
NVDIMM-N memory module installation guidelines ..............................................................................................81
Mode-specic guidelines...........................................................................................................................................83
Removing a memory module....................................................................................................................................84
Installing a memory module...................................................................................................................................... 85
NVDIMM-N battery.........................................................................................................................................................86
Removing the NVDIMM-N battery......................................................................................................................... 86
Installing the NVDIMM-N battery............................................................................................................................ 87
Processors and heat sinks.............................................................................................................................................. 88
Removing a processor and heat sink module.........................................................................................................88
Removing the processor from the processor and heat sink module...................................................................89
Installing the processor into a processor and heat sink module............................................................................91
Installing a processor and heat sink module........................................................................................................... 93
Expansion cards and expansion card risers.................................................................................................................. 94
Expansion bus specications....................................................................................................................................94
Removing an expansion card riser..........................................................................................................................100
Installing an expansion card riser............................................................................................................................ 102
Removing an expansion card from the expansion card riser.............................................................................. 105
Installing an expansion card into expansion card riser......................................................................................... 108
IDSDM/vFlash card (optional)........................................................................................................................................111
Removing the micro SD card....................................................................................................................................111
Installing the micro SD card..................................................................................................................................... 112
Removing the optional IDSDM/vFlash card...........................................................................................................112
Installing the optional IDSDM/vFlash card.............................................................................................................113
Network daughter card.................................................................................................................................................. 114
Removing the network daughter card....................................................................................................................114
Installing the network daughter card......................................................................................................................115
Integrated storage controller card.................................................................................................................................116
Removing the integrated storage controller card..................................................................................................116
Installing the integrated storage controller card....................................................................................................118
Hard drives.......................................................................................................................................................................119
Removing a hard drive blank....................................................................................................................................119
Installing a hard drive blank..................................................................................................................................... 120
Removing a hard drive..............................................................................................................................................121
Installing a hard drive................................................................................................................................................122
Removing the hard drive from the hard drive carrier...........................................................................................123
Installing a hard drive into the hard drive carrier...................................................................................................123
Hard drive backplane......................................................................................................................................................124
Removing the hard drive backplane ......................................................................................................................124
Installing the hard drive backplane ........................................................................................................................ 126
Removing the 2.5 inch hard drive backplane (rear)............................................................................................. 127
Installing the 2.5 inch hard drive backplane (rear)............................................................................................... 128
Cable routing.............................................................................................................................................................130
Hard drive cage (rear)....................................................................................................................................................134
Removing the rear hard drive cage........................................................................................................................ 134
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Installing the rear hard drive cage.......................................................................................................................... 135
System battery............................................................................................................................................................... 136
Replacing the system battery................................................................................................................................. 136
USB module.....................................................................................................................................................................137
Removing the USB module..................................................................................................................................... 137
Installing the USB module........................................................................................................................................138
Internal USB memory key (optional)............................................................................................................................139
Replacing optional internal USB memory key....................................................................................................... 140
Optical drive (optional).................................................................................................................................................. 140
Removing the optical drive......................................................................................................................................140
Installing the optical drive.........................................................................................................................................141
Power supply units......................................................................................................................................................... 142
Hot spare feature......................................................................................................................................................142
Removing a power supply unit blank......................................................................................................................142
Installing a power supply unit blank........................................................................................................................ 143
Removing a power supply unit................................................................................................................................143
Installing a power supply unit.................................................................................................................................. 144
Wiring instructions for a DC power supply unit....................................................................................................145
System board.................................................................................................................................................................. 147
Removing the system board....................................................................................................................................147
Installing the system board......................................................................................................................................148
Trusted Platform Module...............................................................................................................................................150
Replacing the Trusted Platform Module.................................................................................................................151
Initializing TPM for BitLocker users........................................................................................................................ 151
Initializing the TPM 1.2 for TXT users.................................................................................................................... 152
Control panel...................................................................................................................................................................152
Removing the left control panel............................................................................................................................. 152
Installing the left control panel................................................................................................................................153
Removing the right control panel...........................................................................................................................154
Installing the right control panel............................................................................................................................. 155
7 Using system diagnostics............................................................................................................................157
Dell Embedded System Diagnostics.............................................................................................................................157
Running the Embedded System Diagnostics from Boot Manager.....................................................................157
Running the Embedded System Diagnostics from the Dell Lifecycle Controller.............................................. 157
System diagnostic controls..................................................................................................................................... 158
8 Jumpers and connectors ........................................................................................................................... 159
System board jumper settings...................................................................................................................................... 159
System board jumpers and connectors.......................................................................................................................160
Disabling forgotten password........................................................................................................................................ 161
9 Getting help............................................................................................................................................... 163
Receiving automated support with SupportAssist ....................................................................................................163
Contacting Dell............................................................................................................................................................... 163
Documentation feedback.............................................................................................................................................. 164
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Accessing system information by using QRL..............................................................................................................164
Quick Resource Locator for R640..........................................................................................................................164
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PowerEdge R640 system overview
The PowerEdge R640 is a 1U rack server that supports up to:
• Two Intel Xeon Processor Scalable Family processors
• 8 x 2.5 inch hard drives or 4 x 3.5 inch hard drives on the front panel, or 10 x 2.5 inch hard drives on the front panel with optional
support for 2 X 2.5 inch hard drives on the back panel
• 24 DIMM slots
• Two AC or DC redundant power supply units
Topics:
• Supported congurations for PowerEdge R640
• Front view of the system
• Back view of the system
• Hard drive indicator codes
• LCD panel
• Locating Service Tag of your system
Supported congurations for PowerEdge R640
The PowerEdge R640 system supports the following congurations:
1
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PowerEdge R640 system overview

Figure 1. Supported congurations for PowerEdge R640
Dell EMC PowerEdge R640 Installation and Service Manual
PowerEdge R640 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 8 x 2.5 inch hard drive system
Figure 3. Front view of 4 x 3.5 inch hard drive system
Figure 4. Front view of 10 x 2.5 inch hard drive system
Table 1. Features available on the front of the system
Item Ports, panels, and slots Icon Description
1 Left control panel N/A Contains the system health and system ID, status LED, and the
iDRAC Quick Sync 2 (wireless) indicator.
NOTE: The iDRAC Quick Sync 2 indicator is available only on
certain congurations.
• Status LED: Enables you to identify any failed hardware
components. There are up to ve status LEDs and an overall
system health LED (Chassis health and system ID) bar. For more
information, see the Status LED indicators section.
• Quick Sync 2 (wireless): Indicates a Quick Sync enabled system.
The Quick Sync feature is optional. This feature allows
management of the system by using mobile devices. This feature
aggregates hardware or rmware inventory and various system
level diagnostic and error information that can be used in
troubleshooting the system. For more information, see the
Integrated Dell Remote Access Controller User’s Guide at
Dell.com/idracmanuals.
2 Optical drive (optional) N/A One optional slim SATA DVD-ROM drive or DVD+/-RW drive.
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PowerEdge R640 system overview

Item Ports, panels, and slots Icon Description
NOTE: DVD devices are data only.
3 USB port (optional) The USB port is USB 3.0 compliant.
4 VGA port Enables you to connect a display device to the system. For more
information, see the Technical specications section.
5 Right control panel N/A Contains the power button, USB port, iDRAC Direct micro port, and
the iDRAC Direct status LED.
6 Hard drive slots N/A Enable you to install hard drives that are supported on your system.
For more information about hard drives, see the Technical
specications section.
Left control panel view
Figure 5. Left control panel with optional iDRAC Quick Sync 2.0 indicator
Table 2. Left control panel
Item Indicator or button 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.
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PowerEdge R640 system overview
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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
a failed power supply unit (PSU) or
voltage regulator).
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.
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.
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PowerEdge R640 system overview

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.
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.
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PowerEdge R640 system overview
13

iDRAC Quick Sync 2 indicator
code
Condition Corrective action
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.
Right control panel view
Figure 8. Right control panel
Table 6. Right control panel
Item Indicator or button 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.
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PowerEdge R640 system overview

Item Indicator or button Icon Description
NOTE: Press the power
button to gracefully shut
down an ACPI-compliant
operating system.
2 USB port The USB ports are 4-pin, 2.0-
compliant. These ports enable
you to connect USB devices to
the system.
3 iDRAC Direct LED N/A The iDRAC Direct LED indicator
lights up to indicate that the
iDRAC Direct port is actively
connected to a device. For more
information, see the iDRAC
Direct LED indicator codes
section.
4 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.
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.
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.
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PowerEdge R640 system overview
15

Back view of the system
The back view displays the features available on the back of the system.
Figure 9. Back view of 2 x 2.5 inch hard drives with 1 PCIe expansion slot
Figure 10. Back view of system with 3 PCIe expansion slots
Figure 11. Back view of system with 2 PCIe expansion slots
Table 8. 2 X 2.5 inch hard drive system with 1 PCIe expansion slot
Item Ports, panels, or slots Icon Description
1 PCIe expansion card slot(s) N/A The expansion slot(s) enable you to connect PCI Express expansion
cards. For more information on the expansion cards that are supported
on your system, see the Expansion card guidelines.
2 Hard drive slots N/A Enable you to install hard drives that are supported on your system. For
more information about hard drives, see the Technical specications
section.
3 Power supply unit (2) N/A For more information about the PSU congurations, see the Technical
Specications section
4 NIC port (4) 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.
5 USB 3.0 port The USB ports are 9-pin and 3.0-compliant. These ports enable you to
connect USB devices to the system.
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PowerEdge R640 system overview

Item Ports, panels, or slots Icon Description
6 VGA port Enables you to connect a display device to the system. For more
information, see the Technical specications section.
7 Serial port Enables you to connect a serial device to the system. For more
information, see the Technical specications section.
8 iDRAC9 Enterprise port Enables you to remotely access iDRAC. For more information, see the
iDRAC User’s Guide at Dell.com/idracmanuals.
9 CMA power port N/A The Cable Management Arm (CMA) power port enables you to connect
to the CMA.
10 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.
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 12. NIC indicator codes
1link 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.
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.
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PowerEdge R640 system overview
17

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 13. 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.
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.
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PowerEdge R640 system overview

Figure 14. 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.
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19

Hard drive indicator codes
Each hard drive carrier has an activity LED indicator and a status LED indicator. The indicators provide information about the current status
of the hard drive. The activity LED indicator indicates whether the hard drive is currently in use or not. The status LED indicator indicates
the power condition of the drive.
Figure 15. Hard drive indicators
1hard drive activity LED indicator 2 hard drive status LED indicator
3 hard drive
NOTE: If the hard drive is in the Advanced Host Controller Interface (AHCI) mode, the status LED indicator does not turn on.
Table 12. Hard drive indicator codes
Hard 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 Dell EMC PowerEdge R640 Installation and Service Manual
PowerEdge R640 system overview