Synology DS1621+ Manual
Synology NAS DS1621+
Hardware Installation Guide
Table of Contents
Chapter 1: Before You Start
Package Contents 3
Synology DS1621+ at a Glance 4
LED Indicator Table 5
Hardware Specication 6
Optional Accessories 7
Spare Parts 8
Safety Instructions 9
Chapter 2: Hardware Setup
Tools and Parts for Component Installation 10
Install Drives 10
Start Up Your Synology NAS 12
Add a Memory Module to Synology NAS 13
Add an M.2 NVMe SSD to Synology NAS 15
Add a Network Interface Card 16
Chapter 3: System Maintenance
Replace System Fan 17
Initial Troubleshooting Guide 20
Chapter 4: Install DSM on Synology NAS
Install DSM with Web Assistant 21
Learn More 21
2
Synology_HIG_DS1621+_20200622
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 28
Before You Start 1
Chapter
3
3
4Chapter 1: Before You Start
Synology DS1621+ at a Glance
No. Article Name Location Description
1 Status Indicator
Front
Displays the status of the system. For more information, see
"LED Indicator Table".
2 Alert Indicator Displays warnings regarding fan or temperature. For more
information, see "LED Indicator Table".
3 Power 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.
4 LAN Indicator Displays the status of the network connection. For more
information, see "LED Indicator Table".
5 Drive Status Indicator Displays the status of each drive. For more information, see
"LED Indicator Table".
6 Drive Tray Install drives (hard disk drives or solid state drives) here.
7 USB 3.0 Port Connect external drives or other USB devices to the Synology
NAS here.
8 Drive Tray Lock Lock or unlock drive trays.
9 Power 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 one PCIe x8 slots (x4 link) add-on card.
12 Kensington Security Slot Attach a Kensington security lock here.
13 USB 3.0 Port Connect external drives or other USB devices to 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 eSATA Port Connect Synology Expansion Unit1to the Synology NAS here.
6
12
8
11910
12
4
35
713 14 15 16
1For more information about Synology Expansion Unit supported by your Synology NAS, please visit www.synology.com.
5Chapter 1: Before You Start
LED Indicator Table
LED Indicator Color Status Description
STATUS
Green Static Volume normal
Orange Blinking
Volume degraded/Volume crashed
Volume not created
DSM not installed
O HDD hibernation
Disk Status Indicator
(on tray)
Green
Static Drive ready and idle
Blinking Accessing drive
Orange Static Drive error/Port disabled1
O No internal drive
Power
Blue
Static Powered on
Blinking Booting up/Shutting down
O Powered o
ALERT
Orange Blinking Fan failure/Over temperature
O System normal
Front 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 connection
Orange 100 Mbps connection
O 10 Mbps connection/No network
Note: Model specications are subject to change without notice. Please refer to www.synology.com for the latest information.
1Please 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.
6Chapter 1: Before You Start
Item DS1621+
Compatible Drive Type • 3.5"/2.5" SATA x 6
• M.2 2280 NVMe SSD x 2
Maximum Internal Raw Capacity • 96 TB (6 x 16 TB HDD)
• 256 TB with 2 x DX517 (expansion unit)
External Port • USB 3.0 x 3
• 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 282 x 243
Weight (kg) 5.1
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.
Hardware Specication
7Chapter 1: Before You Start
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.
• Memory Module
Model Name Picture Description
D4ES01-4G 4GB DDR4 ECC Unbuered
SODIMM
D4ES01-8G 8GB DDR4 ECC Unbuered
SODIMM
D4ECSO-2666-16G 16GB DDR4 ECC Unbuered
SODIMM
• PCIe Add-in Card
Model Name Picture Description
E10G17-F2 Dual-port, 10GbE SFP+
network interface card
E10G18-T1 Single-port, 10GbE RJ-45
network interface card
E10G18-T2 Dual-port, 10GbE RJ-45
network interface card
• Expansion Unit
Model Name Picture Description
DX517 5-bay
2.5"/3.5" SATA expansion
Note: Your Synology NAS supports up to two expansion units.
9Chapter 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.
10
Tools and Parts for Component Installation
Please prepare the following tools and parts before setting up your Synology NAS:
• A screwdriver (only for 2.5" drives)
• At least one 3.5" or 2.5" SATA drive (please visit www.synology.com/compatibility for compatible drive
models)
Warning: If you install a drive that contains data, the system will format the drive and erase all existing data.
Please back up any important data before installation.
Install Drives
1 Press the lower part of the hard drive tray to unlock the handle.
2 Pull out the hard drive tray handle as shown below to remove the hard drive tray.
3 Load drives in the drive trays.
• For 3.5" drives: Remove the fastening panels from the sides of the drive tray. Place the drive in the drive
tray. Then insert the fastening panels to secure the drive in place.
Hardware Setup 2
Chapter
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