Synology DS1821+ Manuel

Synology NAS DS1821+

Hardware Installation Guide

Table of Contents

Chapter 1: Before You Start

Package Contents 3

Synology DS1821+ at a Glance 4

System Modes and LED Indicators 5

Other LED Indicators 7

Hardware Specication 8

Spare Parts 9

Optional Accessories 9

Safety Instructions 10

Chapter 2: Hardware Setup

Tools and Parts for Component Installation 11

Install Drives 11

Start Up Your Synology NAS 13

Add a Memory Module to Synology NAS 14

Add an M.2 NVMe SSD to Synology NAS 16

Add a Network Interface Card 17

Chapter 3: System Maintenance

Replace System Fan 18

Chapter 4: Install DSM on Synology NAS

Install DSM with Web Assistant 21

Learn More 21

Synology_HIG_DS1821+_20200828

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 cord x 1

RJ-45 LAN cable x 2

Hard drive tray key x 2

Screws for 2.5" drives x 36

Before You Start 1

Chapter

4Chapter 1: Before You Start

Synology DS1821+ at a Glance

No. Article Name Location Description

1STATUS Indicator

Front

Displays the status of the system. For more information, see

"System Modes and LED Indicators".

2ALERT Indicator Displays warnings regarding fan or temperature. For more

information, see "Other LED Indicators".

3POWER Button

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.

4LAN Indicator Displays the status of the network connection. For more

information, see "Other LED Indicators".

5DRIVE Status Indicator Displays the status of each drive. For more information, see

"Other LED Indicators".

6Drive Tray Install drives (hard disk drives or solid state drives) here.

7Drive Tray Lock Lock or unlock drive trays.

8USB 3.2 Gen 1 Port Connect external drives or other USB devices to the Synology

NAS here.

9Power Port

Rear

Connect power cord here.

10 Fan Disposes of excess heat and cools the system. If the fan

malfunctions, the Synology NAS will emit a beeping sound.

11 PCI Express

Expansion Slot Supports the addition of PCIe network interface cards.

12 Kensington Security Slot Attach a Kensington security lock here.

13 eSATA Port 1 Connect Synology Expansion Unit1to the Synology NAS here.

14 LAN Port Connect RJ-45 network cable here.

15 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.

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

NAS here.

17 eSATA Port 2 Connect Synology Expansion Unit1to the Synology NAS here.

6 7

16138171512

3 4 5

1For more information about Synology Expansion Unit supported by your Synology NAS, please visit www.synology.com.

5Chapter 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󰀨icient 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󰀨

6Chapter 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 off > Powering on > DSM not ready

•Powered on with DSM installed:

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

7Chapter 1: Before You Start

Other LED Indicators

LED Indicator Color Status Description

DRIVE status

Green

Static Drive ready and idle

Blinking Accessing drive

Orange Static Drive error/Port disabled1

O󰀨 No internal Drive

ALERT

Orange Blinking System error2

O󰀨 System normal

LAN

Green

Static Network connected

Blinking Network active

O󰀨 No network

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.

8Chapter 1: Before You Start

Hardware Specication

Item DS1821+

Compatible Drive Type • 3.5” / 2.5” SATA x 8

• M.2 2280 NVMe SSD x 2

Maximum Internal Raw Capacity • 128TB (8 x 16TB HDD)

• 288 TB with 2 x DX517 (expansion unit)

External Port •USB 3.2 Gen 1 x 4

• eSATA x 2

LAN Port 1GbE (RJ-45) x 4

PCIe Slot Gen3 x8 slot (x4 link) x 1

Size (H x W x D) (mm) 166 x 343 x 243

Weight (kg) 6.0

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

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

• EAC • VCCI • CCC • RCM • 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 104˚F (0 to 40˚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.

9Chapter 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 D6) 3.5"/2.5" Drive Tray With Lock

Fan 120*25_5 System Fan 120*120*25 mm

PSU 250W_5 PSU 250W 24p+12p+8p

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.

10 Chapter 1: Before You Start

Safety Instructions

Keep away from direct sunlight and from chemicals. Make sure the environment does not experience

abrupt changes in temperature or humidity.

Place the product right side up at all times.

Do not place near any liquids.

Before cleaning, unplug the power cord. Wipe with damp paper towels. Do not use chemical or

aerosol cleaners.

To prevent the unit from falling over, do not place on carts or any unstable surfaces.

The power cord must plug in to the correct supply voltage. Make sure that the supplied AC voltage is

correct and stable.

To remove all electric current from the device, ensure that all power cords are disconnected from the

power source.

Risk of explosion if battery is replaced with an incorrect type. Dispose of used batteries appropriately.

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