Synology DiskStation DS918+ User Guide

: June 7, 2024
: Synology

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Synology DiskStation DS918+

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Before You Start

Thank you for purchasing this Synology product! Before setting up your new DiskStation, 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 DiskStation.

Package Contents

package

Synology DiskStation at a Glance

Overview

No.	Article Name	Location	Description

1

| ****

Status Indicator

| ****

Front Panel

| Displays the status of the system. For more information, see “Appendix B: LED Indicator Table“.

2

| ****

Disk Indicator

| Displays the status of the installed drive. For more information, see “Appendix B: LED Indicator Table“.
3| Drive Tray Lock| Lock or unlock drive trays.
4| USB 3.0 Port| Connect external drives or other USB devices to the DiskStation here.

5

| ****

Power Button

| 1. Press to power on the DiskStation.

2. To power off the DiskStation, press and hold until you hear a beep sound and the Power LED starts blinking.

6| LAN Port| ****

Back Panel

| Connect network cables here.

7

| ****

RESET Button

| 1. Press and hold until you hear a beep sound to restore the default IP address, DNS server, and passwords for the admin account.

2. Press and hold until you hear a beep sound, then press and hold again until you hear three beep sounds to return the DiskStation to “Not installed” status so that DiskStation Manager (DSM) can be reinstalled.

8

| ****

eSATA Port

| Connect external SATA drives or Synology Expansion Unit1 to the DiskStation here.
9| Power Port| Connect the AC power adapter here.

10

| ****

Fan

| Disposes of excess heat and cools the system. If the fan malfunctions, the DiskStation will emit a beeping sound.
11| Kensington Security Slot| Attach a Kensington security lock here.
12| USB 3.0 Port| Connect external drives or other USB devices to the DiskStation here.

Safety Instructions

Keep away from direct sunlight and away 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 electrical 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.

Hardware Setup

Tools and Parts for Drive Installation

A screwdriver (only for 2.5″ drives)
At least one 3.5” or 2.5” SATA drive (please visit www.synology.com 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

Pull out the drive bay which you are installing the drive into.
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.
- For 2.5” drives: Remove the fastening panels from the sides of the drive tray and store them in a safe place. Place the drive in the blue area (shown below) of the drive tray. Turn the tray upside down and tighten the screws to secure the drive in place.
Insert the drive tray into the empty drive bay and push it back until you hear a click when the tray is locked into place.
Repeat the steps above to assemble the other drives you have prepared.
Drives are numbered as shown below:

Note: If you want to create a RAID volume, we recommend that all installed drives are of the same size to make the best use of drive capacity.

Start Up Your DiskStation

Use the LAN cable to connect the DiskStation to your switch, router, or hub.
Connect the AC adapter to the power port of the DiskStation. Connect one end of the AC power cord to the AC power adapter, and the other to the power outlet.
Press the power button.

Congratulations! Your DiskStation is now online and detectable from a network computer.

Add a Memory Module to DiskStation

The optional Synology memory module is designed for DiskStation memory expansion. Follow the steps below to install, check, or remove a memory module on your DiskStation.

To install a memory module:

Shut down your DiskStation. Disconnect all cables connected to your DiskStation to prevent any possible damages.
The memory slots are located inside your DiskStation.
Remove the four drive trays and you will see a pre-installed memory module and an empty slot for memory expansion.
Insert the new memory module into the empty slot:
- Align the notch on the gold contacts of the memory module with the notch on the empty slot. Insert the memory module into the slot. Make sure the module is properly inserted.
- Push down on the memory module with moderate pressure until you hear a click. If you find the module difficult be pushed down, push outwards the lever with your fingers as shown below.
Insert the four drive trays back into the drive bays.
Reconnect the cables you removed in step 1, and then press and hold the power button to turn on your DiskStation.

Important:

When you remove the drive trays, you expose sensitive internal components. Avoid touching anything other than the memory assembly when you remove or add a memory module.
Do not remove the pre-installed memory module to prevent voiding product warranty.
Hold the memory module by its edge, and do not touch the gold contacts.
Synology will not provide complete product warranty or technical support if a non-Synology memory module is used for memory upgrade.

To make sure DiskStation recognizes the new memory capacity:

Shut down your DiskStation. Disconnect all cables connected to your DiskStation to prevent any possible damages.
Remove the four drive trays and you will see the installed module to be removed.
Pull the levers on both sides of the memory module outwards. The memory module will be released from the slot.
Hold the memory module by its notches and remove it from the slot.
Insert the drive trays back into the drive bays.
Reconnect the cables removed in step 1. Now you may turn on your DiskStation.

Add a M.2 NVMe SSD to DiskStation

You may install up to two M.2 NVMe 2280 SSDs to your DiskStation for creating SSD cache volume. Follow the steps below for SSD module installation / removal.
To install a M.2 NVMe SSD module:

Shut down your DiskStation. Disconnect all cables connected to your DiskStation to prevent any possible damages.
The SSD slots are located at the bottom of your DiskStation.
Remove the two lids protecting the modules to be installed. You will see two empty slots, numbered as below.
Start from the first slot. Insert your SSD module into the empty slot:
- Align the notch on the gold contacts of the SSD module with the notch on the empty slot. Insert the module into the slot. Make sure the module is properly inserted.
- Push outwards the lever with your finger, as shown below. While holding the lever, push down the SSD module, and then release the lever to secure the SSD module. Put the lids back in their places.
Reconnect the cables you removed in step 1, and then press and hold the power button to turn on your DiskStation.
Repeat the steps above to install the other SSD module into the second slot, if needed.

To remove the M.2 NVMe SSD module:

Shut down your DiskStation. Disconnect all cables connected to your DiskStation to prevent any possible damages.
Push outwards the lever with your finger. The module will pop up and be released from the slot.
Hold the SSD module and remove it from the slot. Put the lids back in their places.
Reconnect the cables removed in step 1. Now you may turn on your DiskStation.

Install DSM on DiskStation

After hardware setup is finished, please install DiskStation Manager (DSM) – Synology’s browser-based operating system – on your DiskStation.

Install DSM with Web Assistant

Your DiskStation comes with a built-in tool called Web Assistant that helps you download the latest version of DSM from the Internet and install it on your DiskStation. To use Web Assistant, please follow the steps below.

Power on the DiskStation.
Open a web browser on a computer connected to the same network as the DiskStation.
Enter either of the following into the address bar of your browser:
- find.synology.com
- diskstation:5000
Web Assistant will be launched in your web browser. It will search for and find the DiskStation within the local network. The status of the DiskStation should be Not installed.
Click Connect to start the setup process and follow the onscreen instructions.

Note:

The DiskStation must be connected to the Internet to install DSM with Web Assistant.
Suggested browsers: Chrome, Firefox.
Both the DiskStation and the computer must be in the same local network.

Specifications

Item	DS918+
Compatible Drive Type	3.5″ / 2.5″ SATA x 4
Maximum Internal Raw Capacity	40 TB (4 x 10 TB HDD)

External Ports

| • USB 3.0 x 2

• eSATA x 1

LAN Port| 1GbE (RJ-45) x 2
Size (H x W x D) (mm)| 166 x 199 x 223
Weight (kg)| 2.28

Supported Clients

| • Windows 7 and 10

• Mac OS X 10.11 onward

File Systems

| • Internal: Btrfs, ext4

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

Supported RAID Types

| • Basic • JBOD • RAID 0 • RAID 1

• RAID 5 • RAID 6 • RAID 10

• Synology Hybrid RAID (2-Disk Fault Tolerance)

• Frequency: 50/60Hz

• Operating Temperature: 40 to 104˚F (5 to 40˚C)

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

• Relative Humidity: 5% to 95% RH

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

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
Off| HDD hibernation

DISK 1-4

| ****

Green

Power

| ****

Blue

| Static| Powered on
Blinking| Booting up or shutting down
Off| Powered off

Rear LAN

(on upper side of jack)

| ****

Green

| Static| Network connected
Blinking| Network active
Off| No network

Rear LAN

(on lower side of jack)

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

SYNOLOGY, INC.

END USER LICENSE AGREEMENT

IMPORTANT–READ CAREFULLY: THIS END USER LICENSE AGREEMENT (“EULA”) IS A LEGAL AGREEMENT BETWEEN YOU (EITHER AN INDIVIDUAL OR A LEGAL ENTITY) AND SYNOLOGY, INC. (“SYNOLOGY”) FOR THE SYNOLOGY SOFTWARE INSTALLED ONTO THE SYNOLOGY PRODUCT PUCHASED BY YOU (THE “PRODUCT”), OR LEGALLY DOWNLOADED FROM WWW.SYNOLOGY.COM, OR ANY OTHER CHANNEL PROVIDED BY SYNOLOGY ( “SOFTWARE”).

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FCC Declaration of Conformity

This 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. synology