Dell EMC PowerEdge R7425 Manual

Dell EMC PowerEdge R7425
Installation and Service Manual
Regulatory Model: E38S Series
Regulatory Type: E38S002

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.
©2017 - 2018 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.
2018 - 02
Rev. A01

Contents
1 PowerEdge R7425 system overview...............................................................................................................8
Supported conguration....................................................................................................................................................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.................................................................................................................................................... 18
Power supply unit indicator codes............................................................................................................................18
Drive indicator codes.................................................................................................................................................20
LCD panel.................................................................................................................................................................... 21
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 card riser specications................................................................................................................................29
Memory specications.................................................................................................................................................... 29
Storage controller specications....................................................................................................................................30
Drive specications..........................................................................................................................................................30
Drives...........................................................................................................................................................................30
Optical drive................................................................................................................................................................ 31
Ports and connectors specications.............................................................................................................................. 31
USB ports.................................................................................................................................................................... 31
NIC ports......................................................................................................................................................................31
VGA ports.................................................................................................................................................................... 31
Serial connector......................................................................................................................................................... 32
IDSDM or vFlash module.......................................................................................................................................... 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.......................................................................................................... 38
Setting up your system................................................................................................................................................... 38
iDRAC conguration........................................................................................................................................................ 38
Options to set up iDRAC IP address........................................................................................................................38
Contents 3

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............................................................................................................................................... 41
System Setup details.................................................................................................................................................42
System BIOS...............................................................................................................................................................42
iDRAC Settings utility................................................................................................................................................ 59
Device Settings.......................................................................................................................................................... 60
Dell Lifecycle Controller...................................................................................................................................................60
Embedded system management............................................................................................................................. 60
Boot Manager.................................................................................................................................................................. 60
Viewing Boot Manager..............................................................................................................................................60
Boot Manager main menu........................................................................................................................................ 60
One-shot BIOS boot menu........................................................................................................................................61
System Utilities........................................................................................................................................................... 61
PXE boot............................................................................................................................................................................61
6 Installing and removing system components................................................................................................ 62
Safety instructions...........................................................................................................................................................62
Before working inside your system................................................................................................................................62
After working inside your system...................................................................................................................................62
Recommended tools........................................................................................................................................................63
Optional front bezel......................................................................................................................................................... 63
Removing the front bezel..........................................................................................................................................63
Installing the front bezel............................................................................................................................................64
System cover................................................................................................................................................................... 65
Removing the system cover.....................................................................................................................................65
Installing the system cover....................................................................................................................................... 66
Backplane cover...............................................................................................................................................................67
Removing the backplane cover................................................................................................................................ 67
Installing the backplane cover.................................................................................................................................. 68
Inside the system............................................................................................................................................................. 69
Air shroud...........................................................................................................................................................................71
Removing the air shroud............................................................................................................................................71
Installing the air shroud..............................................................................................................................................72
Cooling fan assembly.......................................................................................................................................................73
Removing the cooling fan assembly........................................................................................................................ 73
Installing the cooling fan assembly...........................................................................................................................74
Cooling fans...................................................................................................................................................................... 75
Removing a cooling fan............................................................................................................................................. 75
Installing a cooling fan................................................................................................................................................76
4 Contents

Intrusion switch................................................................................................................................................................ 77
Removing an intrusion switch...................................................................................................................................77
Installing an intrusion switch..................................................................................................................................... 78
Mid drive tray....................................................................................................................................................................79
Removing the mid drive tray.....................................................................................................................................79
Installing the mid drive tray.......................................................................................................................................80
Removing drive blank from the mid drive carrier....................................................................................................81
Installing drive blank into the mid drive carrier....................................................................................................... 82
Removing the drive carrier from the mid drive tray.............................................................................................. 83
Installing the drive carrier into the mid drive tray...................................................................................................84
Removing a 3.5 inch drive from the 3.5 inch drive carrier....................................................................................85
Installing a 3.5 inch drive into the 3.5 inch drive carrier........................................................................................ 86
Removing a 2.5 inch drive from the 3.5 inch drive carrier.................................................................................... 87
Installing a 2.5 inch drive into the 3.5 inch drive carrier........................................................................................88
Drives.................................................................................................................................................................................89
Removing a drive blank............................................................................................................................................. 89
Installing a drive blank............................................................................................................................................... 90
Removing a drive carrier............................................................................................................................................91
Installing a drive carrier..............................................................................................................................................92
Removing a 2.5 inch drive from the 3.5 inch drive adapter..................................................................................93
Installing a 2.5 inch drive into the 3.5 inch drive adapter......................................................................................93
Removing a 3.5 inch adapter from a 3.5 inch drive carrier...................................................................................94
Installing a 3.5 inch adapter into a 3.5 inch drive carrier.......................................................................................95
Removing a drive from the drive carrier................................................................................................................. 96
Installing a drive into the drive carrier......................................................................................................................97
Rear drive cage................................................................................................................................................................ 98
Removing the rear drive cage.................................................................................................................................. 98
Installing the rear drive cage...................................................................................................................................100
System memory.............................................................................................................................................................. 101
General memory module installation guidelines.................................................................................................... 104
Mode-specic guidelines.........................................................................................................................................104
Removing a memory module.................................................................................................................................. 104
Installing a memory module.....................................................................................................................................105
Processors and heat sinks.............................................................................................................................................106
Removing a heat sink............................................................................................................................................... 107
Removing the processor..........................................................................................................................................108
Installing the processor.............................................................................................................................................112
Installing the heat sink.............................................................................................................................................. 116
Expansion cards and expansion card risers..................................................................................................................118
Expansion card installation guidelines..................................................................................................................... 118
Opening and closing the PCIe card holder latch...................................................................................................122
Removing expansion card from the expansion card riser....................................................................................124
Installing expansion card into the expansion card riser........................................................................................ 127
Removing the riser 2 and 3 blank............................................................................................................................131
Installing the riser 2 and 3 blank............................................................................................................................. 132
Contents 5

Removing the riser 3 blank......................................................................................................................................133
Installing the riser 3 blank........................................................................................................................................ 134
Removing the expansion card riser 1......................................................................................................................135
Installing the expansion card riser 1........................................................................................................................136
Removing the expansion card riser 2..................................................................................................................... 137
Installing the expansion card riser 2....................................................................................................................... 138
Removing the expansion card riser 3.....................................................................................................................140
Installing the expansion card riser 3....................................................................................................................... 140
Optional IDSDM or vFlash module................................................................................................................................ 141
Removing the MicroSD card....................................................................................................................................141
Installing the MicroSD card..................................................................................................................................... 142
Removing the IDSDM or vFlash module................................................................................................................142
Installing the IDSDM or vFlash module..................................................................................................................143
Network daughter card..................................................................................................................................................144
Removing the network daughter card...................................................................................................................144
Installing the network daughter card..................................................................................................................... 145
Drive backplane.............................................................................................................................................................. 146
Drive backplane connectors.................................................................................................................................... 147
Removing the drive backplane................................................................................................................................149
Installing the drive backplane..................................................................................................................................150
Removing the mid drive tray backplane................................................................................................................. 151
Installing the mid drive tray backplane...................................................................................................................152
Removing the 3.5 inch rear drive backplane.........................................................................................................153
Installing the 3.5 inch rear drive backplane........................................................................................................... 154
Removing the 2.5 inch rear drive backplane.........................................................................................................155
Installing the 2.5 inch rear drive backplane........................................................................................................... 155
Cable routing.............................................................................................................................................................156
System battery............................................................................................................................................................... 165
Replacing the system battery................................................................................................................................. 165
USB 3.0 module..............................................................................................................................................................166
Removing the USB 3.0 module...............................................................................................................................166
Installing the USB 3.0 module................................................................................................................................. 167
Optional internal USB memory key.............................................................................................................................. 168
Replacing an internal USB memory key.................................................................................................................168
Optional optical drive..................................................................................................................................................... 169
Removing the optical drive......................................................................................................................................169
Installing the optional optical drive......................................................................................................................... 170
Power supply units.......................................................................................................................................................... 171
Hot spare feature......................................................................................................................................................172
Removing a power supply unit blank......................................................................................................................172
Installing a power supply unit blank........................................................................................................................ 172
Removing a power supply unit................................................................................................................................173
Installing a power supply unit...................................................................................................................................174
Wiring instructions for a DC power supply unit.................................................................................................... 175
Control panel................................................................................................................................................................... 177
6 Contents

Removing the left control panel..............................................................................................................................177
Installing the left control panel................................................................................................................................178
Removing the right control panel........................................................................................................................... 178
Installing the right control panel..............................................................................................................................179
System board..................................................................................................................................................................180
Removing the system board................................................................................................................................... 180
Installing the system board.......................................................................................................................................181
Trusted Platform Module...............................................................................................................................................184
Upgrading the Trusted Platform Module...............................................................................................................184
Initializing TPM for BitLocker users....................................................................................................................... 185
7 Using system diagnostics........................................................................................................................... 186
Dell Embedded System Diagnostics.............................................................................................................................186
Running the Embedded System Diagnostics from Boot Manager.....................................................................186
Running the Embedded System Diagnostics from the Dell Lifecycle Controller..............................................186
System diagnostic controls......................................................................................................................................187
8 Jumpers and connectors ........................................................................................................................... 188
System board jumpers and connectors....................................................................................................................... 189
System board jumper settings...................................................................................................................................... 190
Disabling forgotten password........................................................................................................................................ 191
9 Getting help............................................................................................................................................... 192
Contacting Dell............................................................................................................................................................... 192
Documentation feedback.............................................................................................................................................. 192
Accessing system information by using QRL..............................................................................................................192
Quick Resource Locator for PowerEdge R7425 system..................................................................................... 193
Receiving automated support with SupportAssist ....................................................................................................193
Contents 7

PowerEdge R7425 system overview
The PowerEdge R7425 is a 2U rack server that supports up to:
• Two AMD EPYC™processors
• 32 DIMM slots
• Two AC or DC power supply units
• 32 SAS, SATA, Nearline SAS hard drives or SSDs, and up to 24 NVMe drives. For more information about supported drives, see the
Technical specications section.
NOTE: Hot swap for the NVMe drives is supported for your system. For more information on correct usage and technical
specications, see the Dell PowerEdge Express Flash NVMe PCIe SSD 2.5 inch Small Form Factor User's Guide at Dell.com/
support/manuals > All Products > Server, Storage, & Networking > Dell Adapters page.
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guration
• Front view of the system
• Back view of the system
• Locating Service Tag of your system
Supported conguration
The PowerEdge R7425 system supports the following conguration:
1
8 PowerEdge R7425 system overview

Figure 1. Supported conguration
PowerEdge R7425 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 24 x 2.5 inch drive system
Figure 3. Front view of 12 x 3.5 inch drive system
Figure 4. Front view of 8 x 3.5 inch drive system
10 PowerEdge R7425 system overview

Table 1. Features available on the front of the system
Item Panels and slots Icon Description
1 Left control panel N/A Contains system health and system ID, status LED, and the optional
iDRAC Quick Sync 2 (wireless).
2 Drive slots (3.5 inch or 2.5
inch 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 Right control panel N/A Contains the power button, two USB 2.0 ports, iDRAC Direct port,
iDRAC Direct LED, and VGA port.
4 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.
5 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.
6 USB 3.0 port (optional) The USB port is a 9-pin, 3.0-compliant. This port enables you to
connect USB devices to the system.
Left control panel view
Figure 5. Left control panel without optional iDRAC Quick Sync 2.0 indicator
Figure 6. Left control panel with optional iDRAC Quick Sync 2.0 indicator
PowerEdge R7425 system overview 11

Table 2. Left control panel
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.
Status LED indicators
NOTE: The indicators display 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owis 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.
12 PowerEdge R7425 system overview

Icon Description Condition Corrective action
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.
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 7. System health and system ID indicator
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 8. iDRAC Quick Sync 2 indicator
PowerEdge R7425 system overview 13

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 vetimes 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 9. Right control panel view
14 PowerEdge R7425 system overview

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.
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.
You can congure iDRAC Direct by using a type A to micro B USB 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.
PowerEdge R7425 system overview 15

Back view of the system
Figure 10. Back view of three riser system
Figure 11. Back view of 4 x 2.5 inch drive system
Figure 12. Back view of 2 x 3.5 inch drive system
16 PowerEdge R7425 system overview

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.
6 Power supply unit (2) N/A For more information, see the Technical specications section.
7 NIC port 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 deviceto 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 Press the system ID button:
• To locate a particular system within a rack.
• To turn the system ID on or o.
To reset iDRAC, press and hold the button for more than 15 seconds.
NOTE: To reset iDRAC using system ID, ensure that the system
ID button is enabled in the iDRAC setup.
NOTE: If the system stops responding during POST, press and
hold the system ID button (for more than ve seconds) to enter
the BIOS progress mode.
13 Drive slots (3.5 inch or 2.5
inch 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.
PowerEdge R7425 system overview 17

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 13. 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.
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 14. AC PSU status indicator
1 AC PSU status indicator/handle
18 PowerEdge R7425 system overview

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.
Figure 15. DC PSU status indicator
1 DC PSU status indicator
PowerEdge R7425 system overview 19

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.
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 16. Drive indicators on the drive and the mid drive tray backplane
1 drive activity LED indicator 2 drive status LED indicator
3 drive backplane on mid drive tray 4 drive
20 PowerEdge R7425 system overview