Synology DS1821+ Handbuch
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 Specication 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
2
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 dier 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
3
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
19
16138171512
11
14
10
3 4 5
2
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 Denitions
There are 7 system modes in Synology NAS. The System modes and their denitions are as below:
System mode Denition
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 insuicient 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 Specication
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 Certication • 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 specications 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 dierent 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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