ASROCK 2U4N-F/C621-M3 User manual

2U4N-F/C621-M3
2U4N-F/ROME-M3
User Manual
Version 1.0
Published June 2020
Copyright©2020 All rights reserved.

Version 1.0
Published June 2020
Copyright©2020 All rights reserved.
Copyright Notice:
No part of this documentation may be reproduced, transcribed, transmitted, or translated
in any language, in any form or by any means, except duplication of documentation by the
purchaser for backup purpose, without written consent of us.
Products and corporate names appearing in this documentation may or may not be
registered trademarks or copyrights of their respective companies, and are used only for
identication or explanation and to the owners’ benet, without intent to infringe.
Disclaimer:
Specifications and information contained in this documentation are furnished for
informational use only and subject to change without notice, and should not be
constructed as a commitment by us. We assumes no responsibility for any errors or
omissions that may appear in this documentation.
With respect to the contents of this documentation, we do not provide warranty of any
kind, either expressed or implied, including but not limited to the implied warranties or
conditions of merchantability or tness for a particular purpose.
In no event shall we, our directors, ocers, employees, or agents be liable for any indirect,
special, incidental, or consequential damages (including damages for loss of prots, loss of
business, loss of data, interruption of business and the like), even if we have been advised
of the possibility of such damages arising from any defect or error in the documentation or
product.
is device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may cause undesired operation.
CALIFORNIA, USA ONLY
e Lithium battery adopted on this motherboard contains Perchlorate, a toxic substance
controlled in Perchlorate Best Management Practices (BMP) regulations passed by the
California Legislature. When you discard the Lithium battery in California, USA, please
follow the related regulations in advance.
“Perchlorate Material-special handling may apply, see www.dtsc.ca.gov/hazardouswaste/
perchlorate”

Setting up the Server in a Restricted Access Location
• Access can only be gained by service persons or by users who have been instructed
about the reasons for the restrictions applied to the location and about any precautions
that shall be taken.
• Access is through the use of a tool or lock and key, or other means of security, and is
controlled by the authority responsible for the location.
• Leave enough clearance (25 inches in the front and 30 inches in the back of the rack) to
allow the front door to be opened completely and to allow for sucient airow.
• is product is for installation merely in a Restricted Access Location.
• is product is not suitable for use with visual display work place devices according to §2
of the the German Ordinance for Work with Visual Display Units.
Replaceable Batteries
CAUTION
RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE.
DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS
Warning
When removal of the chassis lid required for servicing:
- Turn o power and unplug any power cords/cables, and
- Reinstall the chassis lid before restoring power.
Important Safety Instructions
Pay close attention to the following safety instructions before performing any of
the operation. Basic safety precautions should be followed to protect yourself from
harm and the product from damage:
• Operation of the product should be carried out by suitably trained, qualied, and
certied personnel only to avoid risk of injury from electrical shock or energy hazard.
• Disconnect the power cord from the wall outlet when installing or removing main
system components, such as the motherboard and power supply unit.
• Place the system on a stable and at surface.
• Use extreme caution when working with high-voltage components.
• When handling parts, use a grounded wrist strap designed to prevent static discharge.
• Keep the area around the system clean and clutter-free.
• Keep all components and printed circuit boards (PCBs) in their antistatic bags when
not in use.
• Handle a board by its edges only; do not touch its components, peripheral chips,
memory modules or contacts.

Contents
Chapter 1 Introduction 1
1.1 Shipping Box Contents 2
1.2 Specications 3
Chapter 2 Server System Overview 4
2.1 System Components 4
2.2 Internal Features 5
2.3 Board Arrangement 7
2.4 System Front Panel 9
2.5 System Rear Panel 10
2.6 Front Control Panel Buttons and LEDs 11
2.7 PSU LED 12
2.8 Drive Tray LEDs 13
Chapter 3 Hardware Installation and Maintenance 14
3.1 Hard Drive 15
3.2 Power Supply 17
3.3 Node / Server Board Tray 19
3.4 Server Board 20
3.5 System Fan 21
3.6 Add-on Card (Low Prole) 22
3.7LAN Mezzanine Card 25
3.8 Interposer Board (Power Supply Unit) 27
3.9 Chassis Management Board (Power Supply Unit) 28
3.10 Power Distribution Board 29

Chapter 4 Chassis Cables 30
Chapter 5 Board Specications 32
5.1 Hard Drive Backplanes (BPB) 32
5.2 Right / Left Power Distribution Board (RPDB / LPDB) 33
5.3 Power Supply Unit Interposer Board (PSU-IPB) 34
5.4 Chassis Management Board (CM) 34
5.5 Front Panel Board (FPB) 35
Appendix A 36
Installing the CPU (Socket: LGA4094) 36
Installing the CPU (Socket: LGA3647) 40
Installation of Memory Modules (DIMM) 44
Appendix B 45
Installing the Server in a Rack 45

2U4N-F/C621-M3 / 2U4N-F/ROME-M3
6 1
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Chapter 1 Introduction
ank you for purchasing 2U4N-F/C621-M3 / 2U4N-F/ROME-M3, a reliable
system produced under our consistently stringent quality control. It delivers excellent
performance with robust design conforming to our commitment to quality and
endurance.
e illustrations shown in this manual are examples only, the actual system may dier
slightly .
Because the hardware specications might be updated, the content of this documentation
will be subject to change without notice.

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1.1 Shipping Box Contents
Item Quantity
(per node)
Total
Quantity
2U4N-F/C621-M3 / 2U4N-F/ROME-M3 Barebone (2U form
factor) 1 1
System Fans 416
System Boards (MB) 1 4
HDD Backplanes (BPB) 1 4
Front Panel Boards (FPB) 1 4
PSU Interposer Boards (PSU-IPB) 1 4
Right Power Distribution Boards (RPDB) 1
Le Power Distribution Boards (LPDB) 1
Chassis Management Board (CM) 1
Power Supply Units (PSU) 2
Mini SAS HD Cables, MB to BPB, 750mm 1 4
HDD Power Cables, 12Pin, BPB to IPB, 400mm 1 4
Front Panel USB Cables, 10Pin, MB to FPB, 460mm 1 4
SMB Cables (R), 5Pin, MB to BPB, 800 mm 1 4
Power Cables (CM), ATX 20Pin, IPB to PSU-IPB, 150/350mm 1 4
Power Cables, ATX 16Pin, IPB to MB, 250/350mm 1 4
Slimline to OCU Cables, 600mm (ROME-M3) 2 4
OCU to OCU Cables, 600mm (C621-M3) 8
Accessory Box 1
Support CD 1
User Manual 1
Quick Installation Guide 1
If any items are missing or appear damaged, contact your authorized dealer.

2U4N-F/C621-M3 / 2U4N-F/ROME-M3
2 3
English
1.2 Specications
2U4N-F/C621-M3 / 2U4N-F/ROME-M3
System Physical Status
Form Factor 2U Rackmount
Dimension 778mm *442mm *86mm (30.6”x17.4”x3.4”)(L/W/H, w/o ear)
Support MB Size Half Width, 431.8mm*165.1mm (17”*6.5”)
Half Width, 508mm*165.1mm (20”*6.5”)
Front Panel (per node)
Buttons • Power button
• System reset button
LEDs • Power LED
• UID LED
• Hard Disk Drive activity/error/locate LED
I/O Port 1 x USB 2.0 port
Drive Bay
External 16 x 2.5" SATA/NVMe HDDs (6Gb/s) (4 per node)
System Cooling (per node)
Fan 16 x 40*56 mm system fans (4 per node)
Power Supply
Capacity 2 (1+1), Redundant
Output Watts 1000W @ 100Vac~127Vac
1600W @ 200Vac~240Vac
Eciency Platinum
1. CPU support up to 150W for 2U4N-F/C621-M3, 240W for 2U4N-F/ROME-M3
2. Please contact ASRock Rack sales for target system conguration.
3. Please refer to the user manual of the motherboard you use for detailed information about
motherboard components and features.

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Chapter 2 Server System Overview
is chapter provides diagrams showing the location of important components of
the server system.
2.1 System Components
4 x Nodes and Server Boards
16 x 2.5” Hot-Swap HDD Trays
Front Controls and Indicators
2 x Power Supply Units

2U4N-F/C621-M3 / 2U4N-F/ROME-M3
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2.2 Internal Features
2
1
345 6
78
2
345 6
78

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No. Item
1Power Supply Bay (2 x Power Supply Units)
2Server Board
3System Fan 1
4 System Fan 2
5System Fan 3
6System Fan 4
7HDD1 (SATA)
HDD2 (SATA/NVMe)
8HDD3 (SATA)
HDD4 (SATA/NVMe)

2U4N-F/C621-M3 / 2U4N-F/ROME-M3
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2.3 Board Arrangement
No. Item
1Server Board (Node 1)
2Server Board (Node 2)
3Server Board (Node 3)
4Server Board (Node 4)
5Le Power Distribution Board (LPDB)
6Right Power Distribution Board (RPDB)
7Chassis Management Board (CM)
8PSU Interposer Board (PSU-IPB) (Node 1)
9PSU Interposer Board (PSU-IPB) (Node 2)
10 PSU Interposer Board (PSU-IPB) (Node 3)
11 PSU Interposer Board (PSU-IPB) (Node 4)
12 2.5" HDD Backplane Board (BPB) (Node 1)
15
14
19
18
16
17
6
13
12
7
9
8
10
11
3
4
1
2
5

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No. Item
13 2.5" HDD Backplane Board (BPB) (Node 2)
14 2.5" HDD Backplane Board (BPB) (Node 3)
15 2.5" HDD Backplane Board (BPB) (Node 4)
16 Front Panel Boarde (FPB) (Node 1)
17 Front Panel Boarde (FPB) (Node 2)
18 Front Panel Boarde (FPB) (Node 3)
19 Front Panel Boarde (FPB) (Node 4)

2U4N-F/C621-M3 / 2U4N-F/ROME-M3
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2.4 System Front Panel
2
1
4
3
System
Node
567 8
HDD/NVME1
HDD0 HDD2
HDD/NVME3
No. Description
1Node 1
2Node 2
3Node 3
4Node 4
5 Node Tray Handle
6 4 x 2.5" HDD Trays (per node)
7 Control Panel Buttons and LEDs
8 1 x USB 2.0 Port (per node)

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2.5 System Rear Panel
Redundant PSU 1+1: Only one
PSU is allowed to be removed
while the server is running.
5 6 7 8
5
4
3
2
1
No. Description
1Node 1
2Node 2
3Node 3
4Node 4
5 PCI Express Slot (for the riser card)
*Supports Low prole add-on cards only.
6 I/O Shield (depends on the specication of the server board)
7 Mezzanine Card Support for 1GbE x 2, 10GbE x2 or SFP+ (Fiber) x2
8 2 x Power Supply Units (Redundant PSU 1+1)
*Server requires 1 working PSU, with 1 redundant PSU. You must have at least one active supply,
installed, functioning and connected to AC. Only one of the PSUs is allowed to be removed while
the server is running.

2U4N-F/C621-M3 / 2U4N-F/ROME-M3
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2.6 Front Control Panel Buttons and LEDs
Front Control Panel (per node)
RST
2
1
No. Description
1 System Reset Button / UID LED
2 Power Button and LED
System Reset Button
When the system is completely unresponsive, press the system reset button to reboot the
server without shutting it o and initialize the system.
UID Button
Press the UID button on the rear panel to toggle the front panel UID LED on and o. You
are able to locate the server you’re working on from behind a rack of servers.
Power Button
Press the power switch button to toggle the system power on and o modes.
To remove all power from the system completely, disconnect the power cord from the
server.
Status LED Denitions
ID LED
Status Description
Blue System identication is active.
O System identication is disabled.
Power LED
Status Description
Green Power on
O Power o

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2.7 PSU LED
PSU LED
PSU LED
PSU Status LED
Status Description
Green Normal work; output ON and OK
Amber Module fault/protection in operating mode
(failure, OCP, OVP, Fan Fail, OTP, UVP)
AC cord unplugged
Amber blinking at 0.5Hz Warning (high temp, high power, high current, slow fan)
Green blinking at 0.5Hz AC Present Only 12VSB on (PS o) or PS in Smart
Redundant state
2.8 Drive Tray LEDs
1
2
No. Description
1 HDD Activity LED
2 HDD Power LED

2U4N-F/C621-M3 / 2U4N-F/ROME-M3
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Status LED Denitions
HDD Activity LED
Status Description
Solid Green HDD active
Blinking Green HDD accessing or reading
O No power to HDD
HDD Status LED
Status Description
Blue HDD location
Red HDD failed
O HDD powered-o

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Chapter 3 Hardware Installation and
Maintenance
is chapter helps you assemble the chassis and install components.
Before You Begin
Before you work with the server, pay close attention to the “Important Safety Instructions”
at the beginning of this manual.
1. Make sure the server is powered o.
Power down the server if it is still running.
(1) Press the Power button to power o the server from full-power mode to o mode.
e Power LED at the front turns from solid green to o.
(2) Disconnect the power cord rst from the AC outlet and then from the server.
2. Ensure you have a clean and stable working environment. Avoid dust and dirt because
contaminants may cause malfunctions.
3. Ground yourself properly before touching any system component. A discharge of static
electricity may damage components. Wear a grounded wrist strap if available.
e server is not completely powered down when you press the Power button on the front
panel. To remove all power from the system completely, be sure to disconnect the power
cord from the server.
1. Some components are already pre-installed. Simply properly connect the relavant cables before
or aer installation. See the Quick Installation Guide for more details.
2. Refer to the user manual of the server board you use for instructions on how to install server
board components.