Synology NAS RS2421+ Manuel

Synology NAS RS2421+/RS2421RP+

Hardware Installation Guide

Table of Contents

Chapter 1: Before You Start

Package Contents 3

Synology RS2421+/RS2421RP+ at a Glance 4

System Modes and LED Indicators 6

Other LED Indicators 8

Hardware Specication 9

Spare Parts 10

Optional Accessories 10

Safety Instructions 11

Chapter 2: Hardware Setup

Tools and Parts for Component Installation 12

Install Drives 12

Install Memory Modules 14

Install a PCle Add-in Card 17

Install and Remove Rail Kits 18

Expansion Unit Deployment and Topology 20

Start up Your Synology NAS 21

Chapter 3: System Maintenance

Replace System Fan 22

Replace Power Supply Unit (PSU) 23

Chapter 4: Install DSM on Synology NAS

Install DSM with Web Assistant 24

Learn More 24

Synology_HIG_RS2421(RP)+_20201222

Thank you for purchasing this Synology product! Before setting up your new Synology NAS, please check the

package contents to verify that you have received the items below. Also, make sure to read the safety instructions

carefully to avoid harming yourself or damaging your Synology NAS.

Note: All images below are for illustrative purposes only, and may di󰀨er from the actual product.

Package Contents

Main unit x 1 AC power cord1

Screws for 2.5” drives x 52

Screws for 3.5” drives x 52

Before You Start 1

Chapter

1AC power cord: RS2421+ x1; RS2421RP+ x2

4Chapter 1: Before You Start

Synology RS2421+/RS2421RP+ at a Glance

2 3 4

7 7

RS2421+

11 10

14 1513

RS2421RP+

8 10

14 1513

129

16 17

No. Article Name Location Description

1 POWER Button

and Indicator

Front

1. Press to power on your Synology NAS.

2. To power o󰀨 your Synology NAS, press and hold until you hear

a beep sound and the Power LED starts blinking.

2 STATUS Indicator Displays the status of the system. For more information, see

"System Modes and LED Indicators".

3 ALERT Indicator Displays warnings regarding fan or temperature. For more

information, see "Other LED Indicators".

4 Beep O󰀨 Button Press to deactivate the beep that sounds when a malfunction

occurs.

5 Drive Tray Install drives (hard disk drives or solid state drives) here.

6 DRIVE Status

Indicator

Displays the status of drive. For more information, see "Other

LED Indicators".

7 Rail Kit Release Tab Push in and hold to release your Synology NAS from a rail kit

lock.1

1For more information about the rail kit installation, please refer to the Quick Installation Guide that comes with the rail kit.

5Chapter 1: Before You Start

No. Article Name Location Description

8 Power Port

Rear

Connect power cord here.

9 PSU Indicator and

Beep O󰀨 Button

1. Displays the status of the power supply unit (PSU). For more

information, see "Other LED Indicators."

2. Press to deactivate the beeping sound that is emitted when a

malfunction occurs.

10 PSU Fan Disposes of excess heat and cools the PSU.

11 Power Supply On/O󰀨

Switch Press to turn on/o󰀨 the power supply.

12 Console Port This port is used for manufacturing only.

13 1GbE RJ-45 Port Connect RJ-45 network cable here.

14 USB 3.2 Gen 1 Port Connect external drives or other USB devices to the Synology

NAS here.

15 Expansion Port Connect to Synology Expansion Unit2here.

16 RESET Button

1. Press and hold until you hear a beep sound to restore the IP

address, DNS server, and password for the admin account to

default.

2. Press and hold until you hear a beep, then press and hold again

until you hear three beeps to return the Synology NAS to “Not

Installed” status so that DiskStation Manager (DSM) can be

reinstalled.

17 PCI Express

Expansion Slot Supports the addition of PCIe network interface cards.

2For more information about Synology Expansion Unit supported by your Synology NAS, please visit www.synology.com.

6Chapter 1: Before You Start

System Modes and LED Indicators

System Modes and Denitions

There are 7 system modes in Synology NAS. The System modes and their denitions are as below:

System mode Denition

Powering on Synology NAS is powering on and performing hardware initialization, such as

hardware reset or BIOS initialization.

Shutting down Synology NAS is shutting down as a result of pressing the power button or operation

in DSM.

DSM not ready

DSM is not ready for use. This could either be:

• Synology NAS is powered on, but DSM is not properly installed.

• Synology NAS is currently powering on and initializing services necessary for

DSM to fully function.

• The attached UPS device has insu󰀩cient power; DSM stops all services to

prevent data loss (enters safe mode).

DSM is ready for use DSM is fully functioning and users can sign in.

Hibernation Synology NAS has been idle for a while and is now in Hibernation mode.

Application

Certain packages/services (e.g., USB Copy and Find me service) while in operation

will control the actions of the LED. After the operation is complete, the LED indicator

will return to its normal state.

Powered o󰀨 Synology NAS is powered o󰀨.

Identify System Modes

You can identify the system mode through the POWER and STATUS LED indicators. Please refer to below table

for more details.

System mode

LED Indicator

POWER STATUS

Blue Green Orange

Powering on Blinking O󰀨 O󰀨

Shutting down Blinking Static O󰀨

DSM not ready Static Blinking O󰀨

DSM is ready for use Static Static O󰀨

Hibernation Static O󰀨 O󰀨

Application Static Switching

Powered o󰀨 O󰀨 O󰀨 O󰀨

7Chapter 1: Before You Start

Transitions between System Modes

To better understand the transition between system modes, please refer to below examples:

• Powered on with no DSM installed:

Powered o󰀨 > Powering on > DSM not ready

• Powered on with DSM installed:

Powered o󰀨 > Powering on > DSM not ready > DSM is ready for use

• Enter hibernation then wake up from hibernation:

DSM is ready for use > Hibernation > DSM is ready for use

• Shutdown Synology NAS:

DSM is ready for use > Shutting down > Powered o󰀨

• Power failure with UPS attached:

DSM is ready for use > DSM not ready (due to power failure, DSM enters safe mode) > Shutting down >

Powered o󰀨 > Powering on (power has recovered, DSM will reboot)> DSM not ready > DSM is ready for use

8Chapter 1: Before You Start

Other LED Indicators

LED Indicator Color Status Description

DRIVE status Indicator

(on tray)

Green

Static Drive ready and idle

Blinking Accessing drive

Red Static Drive error/Port disabled1

O󰀨 No internal Drive

ALERT

Orange Blinking System error2

O󰀨 System normal

PSU Indicator3

Green Static Power supply unit normal

O󰀨 Power supply unit o󰀨

Rear 1GbE LAN

(on left side of jack)

Green

Static Network connected

Blinking Network active

O󰀨 No network

Rear 1GbE LAN

(on right side of jack)

Green

Static

1 Gbps connected

Orange 100 Mbps connected

O󰀨 10 Mbps connected/No network

Note:

1 Please try to restart your Synology NAS or re-insert the drives, then run the HDD/SSD manufacturer's

diagnostic tool to check the health status of the drives. If you can sign in to DSM, please run the built-in

S.M.A.R.T. test to scan the drives. If the problem remains unresolved, please contact Synology Technical

Support for help.

2 If the ALERT LED continuously blinks orange, this indicates there are system errors such as fan failure,

system overheating, or volume degrade. Please sign in to DSM for detailed information.

3 Only for RS2421RP+.

9Chapter 1: Before You Start

Hardware Specication

Item RS2421+/RS2421RP+

Compatible Drive Type 3.5"/2.5" SATA x 12

External Port

• USB 3.2 Gen 1 x 2

•Inniband x 1

LAN Port 1GbE RJ-45 x 4

PCIe Slot Gen3 x8 slot (x4 link) x 1

Size (H x W x D) (mm)

• RS2421+: 88 x 430.5 x 664/

88 x 482 x 696 (with server ears)

• RS2421RP+: 88 x 430.5 x 692/

88 x 482 x 724 (with server ears)

Weight (kg)

• RS2421+: 11.5

• RS2421RP+: 11.9

Supported Client

• Windows 7 onwards

• macOS 10.12 onwards

File System

• Internal: Btrfs, ext4

• External: Btrfs, ext4, ext3, FAT32, NTFS, HFS+, exFAT1

Supported RAID Type

• Basic • JBOD • RAID 0 • RAID 1

• RAID 5 • RAID 6 • RAID 10

• Synology Hybrid RAID (2-Disk Fault Tolerance)

Agency Certication • FCC Class A • CE Class A • BSMI Class A

• EAC • VCCI • CCC • RCM • KC • UL • RoHS Compliant

HDD Hibernation Yes

Scheduled Power On/O󰀨 Yes

Wake on LAN Yes

Language Localization

Environment Requirement

• Line voltage: 100 V to 240 V AC

• Frequency: 50/60 Hz

•Operating Temperature: 32 to 95˚F (0 to 35˚C)

•Storage Temperature: -5 to 140˚F (-20 to 60˚C)

• Relative Humidity: 5% to 95% RH

Note: Model specications are subject to change without notice. Please refer to www.synology.com for the latest information.

1Support for exFAT can be enabled by purchasing and downloading exFAT Access in Package Center.

10 Chapter 1: Before You Start

Spare Parts

Visit www.synology.com/products/spare_parts if you need to replace system fans, disk trays, or power supply

units

Model Name Picture Description

Disk Tray (Type R7) 3.5"/2.5" Drive Tray With Lock

FAN 60*38_1 System Fan 60*60*38 mm

PSU 500W_4 ATX PSU 500W (for RS2421+)

PSU 350W-RP SET_1 Redundant PSU Set 350W

(for RS2421RP+)

PSU 350W-RP Module_1 Redundant PSU Module 350W

(for RS2421RP+)

Optional Accessories

With Synology accessories, you can customize your Synology NAS to t di󰀨erent business environments without

worrying about compatibility and stability. Visit www.synology.com/compatibility for more information.

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