Hewlett Packard Enterprise ProLiant DX4200 Gen10 System User manual

HPE ProLiant DX4200 Gen10 System User Guide
Part Number: P22165-001
Published: February 2020
Edition: 1
Abstract
This document is for the person who installs, administers, and troubleshoots servers and storage systems.
Hewlett Packard Enterprise assumes that you are qualified in the servicing of computer equipment and
trained in recognizing hazards in products with hazardous energy levels.

©Copyright 2020 Hewlett Packard Enterprise Development LP
Notices
The information contained herein is subject to change without notice. The only warranties for Hewlett Packard Enterprise
products and services are set forth in the express warranty statements accompanying such products and services.
Nothing herein should be construed as constituting an additional warranty. Hewlett Packard Enterprise shall not be liable
for technical or editorial errors or omissions contained herein.
Confidential computer software. Valid license from Hewlett Packard Enterprise required for possession, use, or copying.
Consistent with FAR 12211 and 12212, Commercial Computer Software, Computer Software Documentation, and
Technical Data for Commercial Items are licensed to the U.S. Government under vendor's standard commercial license.
Links to third-party websites take you outside the Hewlett Packard Enterprise website. Hewlett Packard Enterprise has no
control over and is not responsible for information outside the Hewlett Packard Enterprise website.
Acknowledgments
Intel®and Xeon®are trademarks of Intel Corporation in the U.S. and other countries.
Microsoft®, Windows®, and Windows Server®are either registered trademarks or trademarks of Microsoft Corporation in
the United States and/or other countries.
Linux®is the registered trademark of Linus Torvalds in the U.S. and other countries.
Red Hat®Enterprise Linux is a registered trademark of Red Hat, Inc. in the United States and other countries.
VMware®ESXi™and VMware vSphere®are registered trademarks or trademarks of VMware, Inc. in the United States
and/or other jurisdictions.
microSD is a trademark or a registered trademark of SD-3D in the United States, other countries of both.

Contents
Component identification................................................................................................ 7
Front panel components..............................................................................................................................................................................................7
Rear panel components................................................................................................................................................................................................8
Rear panel LEDs............................................................................................................................................................................................................ 11
System board components..................................................................................................................................................................................... 12
DIMM slot locations....................................................................................................................................................................................13
DIMM label identification........................................................................................................................................................................14
HPE Persistent Memory module label identification..............................................................................................................16
System maintenance switch descriptions.....................................................................................................................................16
NMI functionality......................................................................................................................................................................................... 17
Front panel LEDs and buttons..............................................................................................................................................................................18
UID button functionality..........................................................................................................................................................................20
Front panel LED power fault codes..................................................................................................................................................20
Drive numbering............................................................................................................................................................................................................20
Drive LEDs........................................................................................................................................................................................................................ 22
Low-profile LFF drive LED definitions............................................................................................................................................22
SFF drive components and LEDs.......................................................................................................................................................23
NVMe drive components and LEDs................................................................................................................................................. 24
uFF drive components and LEDs.......................................................................................................................................................26
Drive cage identification...........................................................................................................................................................................................28
Drive cage backplane identification...................................................................................................................................................................28
M.2 SSD slot numbering........................................................................................................................................................................................... 31
HPE Smart Array P824i-p MR Gen10 Controller.......................................................................................................................................32
HPE InfiniBand HDR/Ethernet 940QSFP 56x16 adapter LEDs.......................................................................................................33
Fan locations....................................................................................................................................................................................................................34
Fan numbering............................................................................................................................................................................................................... 34
Operations........................................................................................................................ 36
Power down the system............................................................................................................................................................................................36
Remove the bezel......................................................................................................................................................................................................... 36
Extend the front drive cages out of the chassis......................................................................................................................................... 37
Slide the front drive cages into the chassis...................................................................................................................................................37
Removing a drive.......................................................................................................................................................................................................... 37
Remove the system from the rack......................................................................................................................................................................40
Remove the access panel.........................................................................................................................................................................................41
Install the access panel..............................................................................................................................................................................................42
Open the cable management holder................................................................................................................................................................. 43
Remove the HPE Smart Storage Battery........................................................................................................................................................44
Remove the air bale..................................................................................................................................................................................................45
Install the air bale .....................................................................................................................................................................................................46
Close the cable management holder................................................................................................................................................................. 47
Remove the rear drive cage blank...................................................................................................................................................................... 47
Remove the air blocker from PCIe expansion slots 5–7........................................................................................................................ 48
Remove the PCIe riser cage....................................................................................................................................................................................49
Remove a rear drive cage........................................................................................................................................................................................ 50
3

Setup..................................................................................................................................53
HPE support services................................................................................................................................................................................................. 53
Set up the system.........................................................................................................................................................................................................53
Operational requirements........................................................................................................................................................................................56
Space and airflow requirements.........................................................................................................................................................56
Temperature requirements................................................................................................................................................................... 57
Power requirements.................................................................................................................................................................................. 57
Electrical grounding requirements....................................................................................................................................................58
System warnings and cautions............................................................................................................................................................................. 58
Rack warnings and cautions...................................................................................................................................................................................59
Remove the shipping screws ................................................................................................................................................................................ 60
Installing hardware options.................................................................................................................................................................................... 61
Installing the system into the rack......................................................................................................................................................................61
Power up the system.................................................................................................................................................................................................. 64
Installing the operating system............................................................................................................................................................................64
Selecting boot options in UEFI Boot Mode....................................................................................................................................................64
Registering the server................................................................................................................................................................................................65
Hardware options installation...................................................................................... 66
Product QuickSpecs.................................................................................................................................................................................................... 66
Introduction......................................................................................................................................................................................................................66
Installing the security bezel....................................................................................................................................................................................66
Drive options................................................................................................................................................................................................................... 66
Installing a drive ..........................................................................................................................................................................................67
Drive cage options....................................................................................................................................................................................................... 69
Drive cage installation alerts................................................................................................................................................................ 69
Installing the four-bay LFF hot-plug rear drive cage.............................................................................................................69
Installing the two-bay SFF hot-plug rear drive cage and two-slot PCIe riser cage .............................................70
Installing the six-bay SFF NVMe rear drive cage ....................................................................................................................73
Installing the six-bay SFF rear drive cage (SAS, SATA).......................................................................................................75
M.2 SSD enablement board option.....................................................................................................................................................................76
Installing the M.2 SSD enablement board.................................................................................................................................... 76
Expansion slots.............................................................................................................................................................................................................. 79
Supported PCIe form factors................................................................................................................................................................79
Installing an expansion board or type -p controller................................................................................................................80
Installing an HPE InfiniBand HDR/Ethernet 200Gb 1-port 940QSFP56 x16 Adapter.....................................83
Controller options.........................................................................................................................................................................................................88
Installing a storage controller .............................................................................................................................................................88
Installing a processor-heatsink assembly.......................................................................................................................................................89
Memory options.............................................................................................................................................................................................................91
DIMM population information..............................................................................................................................................................91
DIMM-processor compatibility............................................................................................................................................................ 91
HPE SmartMemory speed information...........................................................................................................................................92
DIMM label identification........................................................................................................................................................................92
Installing a DIMM.........................................................................................................................................................................................93
HPE Persistent Memory option.......................................................................................................................................................... 94
Internal USB device option......................................................................................................................................................................................97
Power supply option................................................................................................................................................................................................... 98
Installing a DC hot-plug power supply........................................................................................................................................... 98
Installing an AC hot-plug power supply......................................................................................................................................105
HPE Smart Storage Battery.................................................................................................................................................................................107
Installing the HPE Smart Storage Battery.................................................................................................................................107
4

HPE Trusted Platform Module 20 Gen10 option..................................................................................................................................109
Overview........................................................................................................................................................................................................109
HPE Trusted Platform Module 20 guidelines........................................................................................................................110
Installing and enabling the HPE TPM 20 Gen10 option................................................................................................. 110
Cabling............................................................................................................................ 115
Cabling overview........................................................................................................................................................................................................115
Front drive cage cabling........................................................................................................................................................................................115
Front and internal drive cage cabling............................................................................................................................................................115
Internal drive cage cabling...................................................................................................................................................................................117
Rear LFF drive cage cabling................................................................................................................................................................................122
Rear SFF drive cage cabling................................................................................................................................................................................ 123
Rear six-bay SFF drive cage cabling (SAS, SATA).................................................................................................................................124
NVMe rear drive cage cabling............................................................................................................................................................................125
M.2 SSD Enablement option cabling.............................................................................................................................................................. 126
HPE Smart Array P824i-p MR Gen10 cabling..........................................................................................................................................128
HPE Smart Storage Battery cabling............................................................................................................................................................... 129
iLO ports to network cabling.............................................................................................................................................................................. 129
Fan assembly cabling.............................................................................................................................................................................................. 130
Front panel cabling...................................................................................................................................................................................................131
Software and configuration utilities......................................................................... 132
Server mode..................................................................................................................................................................................................................132
All Nutanix product documentation............................................................................................................................................................... 132
Product QuickSpecs................................................................................................................................................................................................. 132
Active Health System Viewer............................................................................................................................................................................. 132
Active Health System............................................................................................................................................................................ 133
HPE iLO 5.......................................................................................................................................................................................................................134
iLO Federation........................................................................................................................................................................................... 134
iLO Service Port........................................................................................................................................................................................ 134
iLO RESTful API........................................................................................................................................................................................ 135
RESTful Interface Tool..........................................................................................................................................................................135
iLO Amplifier Pack...................................................................................................................................................................................135
HPE Apollo Platform Manager overview..................................................................................................................................................... 135
HPE Insight Cluster Management Utility.....................................................................................................................................................136
Integrated Management Log..............................................................................................................................................................................136
Intelligent Provisioning.......................................................................................................................................................................................... 137
Intelligent Provisioning operation..................................................................................................................................................137
Management security..............................................................................................................................................................................................138
Scripting Toolkit for Windows and Linux.................................................................................................................................................... 138
UEFI System Utilities............................................................................................................................................................................................... 139
Selecting the boot mode .....................................................................................................................................................................139
Secure Boot..................................................................................................................................................................................................140
Launching the Embedded UEFI Shell ..........................................................................................................................................140
HPE Smart Storage Administrator.................................................................................................................................................................. 141
HPE MR Storage Administrator........................................................................................................................................................................ 141
HPE InfoSight for servers ....................................................................................................................................................................................142
StorCLI............................................................................................................................................................................................................................. 142
USB support..................................................................................................................................................................................................................142
External USB functionality..................................................................................................................................................................143
Redundant ROM support...................................................................................................................................................................................... 143
Safety and security benefits.............................................................................................................................................................. 143
Keeping the system current................................................................................................................................................................................ 143
5

Updating firmware or system ROM...............................................................................................................................................143
Drivers.............................................................................................................................................................................................................146
Software and firmware..........................................................................................................................................................................146
Operating system version support................................................................................................................................................ 146
HPE Pointnext Portfolio.......................................................................................................................................................................146
Proactive notifications...........................................................................................................................................................................147
Troubleshooting............................................................................................................148
Troubleshooting resources..................................................................................................................................................................................148
System battery replacement...................................................................................... 149
Replace the system battery.................................................................................................................................................................................149
Electrostatic discharge................................................................................................ 151
Specifications.................................................................................................................152
Environmental specifications..............................................................................................................................................................................152
Mechanical specifications......................................................................................................................................................................................152
Power supply specifications................................................................................................................................................................................ 153
Hot-plug power supply calculations...............................................................................................................................................................154
Websites......................................................................................................................... 155
Support and other resources...................................................................................... 156
Accessing Hewlett Packard Enterprise Support..................................................................................................................................... 156
Accessing updates.................................................................................................................................................................................................... 156
Customer self repair.................................................................................................................................................................................................157
Remote support..........................................................................................................................................................................................................157
Warranty information..............................................................................................................................................................................................157
Regulatory information.......................................................................................................................................................................................... 158
Documentation feedback......................................................................................................................................................................................158
6

Component identification
Front panel components
12LFF dual cage configuration
Item Description
1 LFF hot-plug drives
2 USB 20 port
3 iLO Service Port
24SFF dual cage configuration
Item Description
1 SFF hot-plug drives
2 USB 20 port
3 iLO Service Port
Component identification 7

Rear panel components
Rear panel with the 4LFF hot-plug rear drive cage option
Item Description
1 PCIe3 x16 slot 7 for low-profile, standup expansion board1
2 PCIe3 x24 slot 6 for low-profile, standup expansion board1
3 PCIe3 x8 slot 5 for low-profile, standup expansion board1
4 Low-profile LFF hot-plug drives
5 PCIe3 x24 slot 2 for low-profile, standup expansion board or riser cage options2
6 PCIe3 x16 slot 1 for low-profile, standup expansion board2
7 Hot-plug power supply (bay 1)
8 Power supply blank (bay 2)
9 Video connector
10 NIC 2 port
11 NIC 1 port
12 USB 30 ports
13 iLO Management port 2
14 UID LED
15 iLO Management port 1
1 The PCIe3 expansion slots 5-7 are associated with processor 2.
2 The PCIe3 expansion slots 1-4 are associated with processor 1.
Rear panel with the 2SFF/uFF hot-plug rear drive cage and two-slot PCIe riser cage options
8Component identification

Item Description
1 PCIe3 x16 slot 7 for low-profile, standup expansion board1
2 PCIe3 x24 slot 6 for low-profile, standup expansion board1
3 PCIe3 x8 slot 5 for low-profile, standup expansion board1
4 SFF/uFF hot-plug drives
5 PCIe3 x16 slot 3 for full-height riser cage2
6 PCIe3 x8 slot 4 for full-height riser cage2
7 PCIe3 x24 slot 2 for low-profile, standup expansion board or riser cage options2
8 PCIe3 x16 slot 1 for low-profile, standup expansion board2
9 Hot-plug power supply (bay 1)
10 Power supply blank (bay 2)
11 Video connector
12 NIC 2 port
13 NIC 1 port
14 USB 30 ports
15 iLO Management port 2
16 UID LED
17 iLO Management port 1
1 The PCIe3 expansion slots 5-7 are associated with processor 2.
2 The PCIe3 expansion slots 1-4 are associated with processor 1.
Rear panel with the 6SFF NVMe hot-plug rear drive cage option with pass-through riser
Item Description
1 PCIe3 x16 slot 7 for low-profile, standup expansion board1
2 PCIe3 x24 slot 6 for low-profile, standup expansion board1
3 PCIe3 x8 slot 5 for low-profile, standup expansion board1
4 SFF NVMe hot-plug drives
5 PCIe3 x24 slot 2 for low-profile, standup expansion board or NVMe pass-through board2
6 PCIe3 x16 slot 1 for low-profile, standup expansion board2
Table Continued
Component identification 9

Item Description
7 Hot-plug power supply (bay 1)
8 Power supply blank (bay 2)
9 Video connector
10 NIC port 2
11 NIC port 1
12 USB 30 ports
13 iLO Management port 2
14 UID LED
15 iLO Management port 1
1 The PCIe3 expansion slots 5-7 are associated with processor 2.
2 The PCIe3 expansion slots 1-4 are associated with processor 1.
Rear panel with the 6SFF SAS or SATA hot-plug rear drive cage option with pass-through riser
Item Description
1 PCIe3 x16 slot 7 for low-profile, standup expansion board1
2 PCIe3 x24 slot 6 for low-profile, standup expansion board1
3 PCIe3 x8 slot 5 for low-profile, standup expansion board1
4 SFF SAS or SATA hot-plug drives
5 PCIe3 x24 slot 2 for low-profile, standup expansion board or NVMe pass-through board2
6 PCIe3 x16 slot 1 for low-profile, standup expansion board2
7 Hot-plug power supply (bay 1)
8 Power supply blank (bay 2)
9 Video connector
10 NIC port 2
11 NIC port 1
12 USB 30 ports
13 iLO Management port 2
14 UID LED
15 iLO Management port 1
10 Component identification

1 The PCIe3 expansion slots 5-7 are associated with processor 2.
2 The PCIe3 expansion slots 1-4 are associated with processor 1.
Rear panel LEDs
Item Description Status
1 iLO port 1 link LED Green = Network link
O = No network link
2 iLO port 1 activity LED Solid green = Link to network
Flashing green = Network active
O = No network activity
3 UID LED Solid blue = Activated
Flashing blue:
• 1 flash per second = Remote management or
firmware upgrade in progress
• 4 flashes per second = iLO manual reboot
sequence initiated
• 8 flashes per second = iLO manual reboot
sequence in progress
O = Deactivated
4iLO port 2 link LED Green = Network link
O = No network link
5 iLO port 2 activity LED Solid green = Link to network
Flashing green = Network active
O = No network activity
6 NIC port 1 link LED Green = Network link
O = No network link
Table Continued
Component identification 11

Item Description Status
7 NIC port 1 activity LED Solid green = Link to network
Flashing green = Network active
O = No network activity
8 NIC port 2 link LED Green = Network link
O = No network link
9 NIC port 2 activity LED Solid green = Link to network
Flashing green = Network active
O = No network activity
10 Power supply LED Solid green = Normal
O = One or more of the following conditions exists:
• Power is unavailable.
• Power supply failed
• Power supply is in standby mode.
• Power supply error
System board components
12 Component identification

Item Description
1 PCIe3 x16 slot 1 for low-profile, standup expansion board or riser cage options1
2 microSD card slot
3 PCIe3 x24 slot 2 for low-profile, standup expansion board, riser cage option, or NVMe pass-through board1
4 TPM 20 connector
5 Flexible Smart Array Controller slot
6 PCIe3 x8 slot 5 for low-profile, standup expansion board2
7 System maintenance switch
8 PCIe3 x24 slot 6 for low-profile, standup expansion board, riser cage options, or NVMe pass-through board2
9 PCIe3 x16 slot 7 for low-profile, standup expansion board or riser cage options2
10 Controller backup power connectors for expansion slots 3-7
11 Front LED connector
12 Processor 2 DIMM slots
13 System battery
14 Processor 1 DIMM slots
15 Fan signal connector
16 Energy pack connector
17 Fan power connector
18 Internal drive cage backplane power connector
19 Controller backup power connectors for expansion slots 1-2
20 Front drive cage backplane power connector
21 Power supply backplane connector
22 Rear drive cage backplane power connector
23 Rear 6SFF NVMe drive cage fan connector
24 Mini SAS connector 1
25 SATA connector 2
26 SATA connector 1
27 Internal USB 30 port
28 Front USB 20 port
1 The PCIe3 expansion slots 1-2 are associated with processor 1.
2 The PCIe3 expansion slots 5-7 are associated with processor 2.
DIMM slot locations
DIMM slots are numbered sequentially (1 through 8) for each processor. The supported AMP modes use the letter
assignments for population guidelines.
Component identification 13

The arrow points to the front of the system.
DIMM label identification
To determine DIMM characteristics, see the label attached to the DIMM. The information in this section helps you to use
the label to locate specific information about the DIMM.
14 Component identification

Item Description Example
1 Capacity 8 GB
16 GB
32 GB
64 GB
128 GB
2 Rank 1R = Single rank
2R = Dual rank
4R = Quad rank
8R = Octal rank
3 Data width on DRAM x4 = 4-bit
x8 = 8-bit
x16 = 16-bit
4 Memory generation PC4 = DDR4
5 Maximum memory speed 2133 MT/s
2400 MT/s
2666 MT/s
6 CAS latency P = CAS 15-15-15
T = CAS 17-17-17
U = CAS 20-18-18
V = CAS 19-19-19 (for RDIMM, LRDIMM)
V = CAS 22-19-19 (for 3DS TSV LRDIMM)
7 DIMM type R = RDIMM (registered)
L = LRDIMM (load reduced)
E = Unbuered ECC (UDIMM)
For more information about product features, specifications, options, configurations, and compatibility, see the product
QuickSpecs on the Hewlett Packard Enterprise website (http://www.hpe.com/info/qs).
Component identification 15

HPE Persistent Memory module label identification
Item Description Example
1 Unique ID number 8089-A2-1802-1234567
2 Model number NMA1XBD512G2S
3 Capacity 128 GB
256 GB
512 GB
4 QR code Includes part number and serial number
For more information about product features, specifications, options, configurations, and compatibility, see the product
QuickSpecs on the Hewlett Packard Enterprise website (https://www.hpe.com/support/persistentmemoryQS).
System maintenance switch descriptions
Position Default Function
S11O O = iLO 5 security is enabled.
On = iLO 5 security is disabled.
S2 O Reserved
S3 O Reserved
S4 O Reserved
S51O O = Power-on password is enabled.
On = Power-on password is disabled.
S61, 2, 3O O = No function
On = Restore default manufacturing settings
Table Continued
16 Component identification

Position Default Function
S7 O Reserved
S8 — Reserved
S9 — Reserved
S10 — Reserved
S11 — Reserved
S12 — Reserved
1 To access the redundant ROM, set S1, S5, and S6 to On.
2 When the system maintenance switch position 6 is set to the On position, the system is prepared to restore all configuration settings to
their manufacturing defaults.
3 When the system maintenance switch position 6 is set to the On position and Secure Boot is enabled, some configurations cannot be
restored. For more information, see Secure Boot.
Disabling the HPE Smart Array S100i Controller
Before changing the boot mode to Legacy BIOS Mode, you must first disable the HPE Smart Array S100i Controller.
NOTE: When you use the software to update, maintain, or monitor the HPE Apollo 4200 Gen10 system, you will see HPE
ProLiant XL420 Gen10 Server as the product name in the interface.
Procedure
1. Reboot the system.
The system restarts and the POST screen appears.
2. Press F9.
The System Utilities screen appears.
3. Select System Configuration > BIOS/Platform Configuration (RBSU) > System Options > SATA Controller
Options > Embedded SATA Configuration, and then press Enter.
4. Select Enable SATA AHCI Support, and then press Enter.
5. To save the selection, press F10.
6. To save the changes, press Y.
The Change saved confirmation prompt appears.
7. Select Exit and resume system boot, and press Enter.
The system continues the normal boot process.
For more information, see the product QuickSpecs on the Hewlett Packard Enterprise website (http://www.hpe.com/
info/qs).
NMI functionality
An NMI crash dump creates a crash dump log before resetting a system which is not responding.
Crash dump log analysis is an essential part of diagnosing reliability problems, such as failures of operating systems,
device drivers, and applications. Many crashes freeze a system, and the only available action for administrators is to
Component identification 17

restart the system. Resetting the system erases any information which could support problem analysis, but the NMI
feature preserves that information by performing a memory dump before a system reset.
To force the system to initiate the NMI handler and generate a crash dump log, do one of the following:
• Use the iLO Virtual NMI feature.
• Short the NMI header.
For more information, see the Hewlett Packard Enterprise website (http://www.hpe.com/support/ilo-docs).
Front panel LEDs and buttons
18 Component identification

Item Description Status
1 Power On/Standby button and
system power LED1
• Solid green = System on
• Flashing green (1 flash per second) = Performing power on
sequence
• Solid amber = System in standby
•O = No power present2
2 UID button/LED1• Solid blue = Activated
• Flashing blue:
◦1 flash per second = Remote management or firmware upgrade
in progress
◦4 flashes per second = iLO manual reboot sequence initiated
◦8 flashes per second = iLO manual reboot sequence in progress
◦1 fast flash and then o for 3 seconds = iLO Service Port status
is Complete
◦4 medium flashes and then o for 1 second = iLO Service Port
status is Busy
◦8 fast flashes and then o for 1 second = iLO Service Port status
is Error
•O = Deactivated
3Health LED1• Solid green = Normal
• Flashing green (1 flash per sec) = iLO is rebooting
• Flashing amber = System degraded3
• Flashing red (1 flash per sec) = System critical3
4 NIC status LED1• Solid green = Link to network
• Flashing green (1 flash per second) = Network active
•O = No network activity
5 Front drive health/thermal LED • Solid green = Drives supported by the SAS expander are functional.4
• Solid amber = Failure or predictive failure of one or more drives
supported by the SAS expander4
•O = No power present2
1 When these four LEDs flash simultaneously, a power fault has occurred.
2 Facility power is not present, power cord is not attached, no power supplies are installed, power supply failure has occurred, or the front
I/O cable is disconnected.
3 If the health LED indicates a degraded or critical state, review the system IML or use iLO to review the system health status
4 This LED behavior applies to all front drives, as well as to the rear drives connected to the internal drive cage backplane.
Component identification 19

UID button functionality
The UID button can be used to display the Server Health Summary when the system will not power on. For more
information, see the latest HPE iLO 5 User Guide on the Hewlett Packard Enterprise website.
Front panel LED power fault codes
The following table provides a list of power fault codes, and the subsystems that are aected. Not all power faults are
used by all servers.
Subsystem LED behavior
System board 1 flash
Processor 2 flashes
Memory 3 flashes
Riser board PCIe slots 4 flashes
FlexibleLOM 5 flashes
Removable HPE Smart Array SR Gen10 controller 6 flashes
System board PCIe slots 7 flashes
Power backplane or storage backplane 8 flashes
Power supply 9 flashes
Drive numbering
24LFF hot-plug front drive numbering
20 Component identification