Big, Scalable Storage For All Your Files
Synology DS3617xs delivers massive storage capacity for all your files and important business data. As your storage needs grow, you can easily scale up capacity by adding an additional storage expansion unit, or two.
Powerful performance for business needs
Featuring a dual-core CPU, hardware encryption engine, and flawless software integration, DiskStation boasts outstanding processing and file transfer speeds. Also, rest easy knowing you can upgrade from 16GB DDR4 RAM to 48GB as your business grows.
Protect your data and accomplish more
The intuitive interface allows you to seamlessly share, collaborate and synchronize files while keeping complete control of your data in a secure, protected environment.

Quad-core 2.2GHz CPU
16GB DDR4 memory (expandable up to 48GB)
2,358 MB/s reading
Four 1GbE (RJ-45) ports w/ failover and Link Aggregation
Scalable up to 36 drives with two DX1215 expansion units
Backed with SRS, Synology’s next business-day replacement service

File Sharing And Syncing
With comprehensive support for network file sharing protocols — like CIFS, AFP, NFS, FTP and more — DiskStation allows the entire office to centralize files and collaborate on projects. Or synchronize files across multiple devices or even across several locations so remote teams can work together.

Btrfs: Next Generation Storage
When dealing with large-scale data storage, businesses require a solution that prevents data corruption, while providing flexible backup tools. The next-generation Btrfs file system brings these tools to Synology NAS servers, allowing businesses and organizations to reduce maintenance overhead and efficiently store their data.

Virtualization Ready
With support for VMware, Citrix, and Microsoft Hyper-V, DiskStation serves as a seamless storage solution for virtualization environments. Consolidate storage in one place and enjoy optimized performance with support for iSCSI & NFS, SSD caching, VMware vSphere 6 & VAAI integration Synology’s Virtual Machine Manager also allows you to set up and run various virtual machines, including Windows, Linux, and Virtual DSM.

High Availability For Business Continuity
By combining two DiskStation servers into a single high-availability cluster, you can maximize uptime and ensure data and services remain available for your employees or users — even when one of the servers goes offline unexpectedly.

Hardware Specifications

CPU

CPU Model
Intel Xeon D-1527

CPU Architecture
64-bit

CPU Frequency
Quad Core 2.2 (base) / 2.7 (turbo) GHz

Hardware Encryption Engine (AES-NI)

Memory

System Memory
16 GB DDR4 ECC SO-DIMM

Memory Module Pre-installed
16GB (2 x 8GB)

Total Memory Slots
4

Memory Expandable up to
48 GB (16 GB + 16 GB x 2)

Storage

Drive Bays
12

Maximum Drive Bays with Expansion Unit
36

Compatible Drive Type*(See all supported drives)

3.5″ SATA HDD
2.5″ SATA HDD
2.5″ SATA SSD

Maximum Internal Raw Capacity
144 TB (12 TB drive x 12) (Capacity may vary by RAID types)

Maximum Raw Capacity with Expansion Units
432 TB (144 TB + 12 TB drive x 24) (Capacity may vary by RAID types)

Maximum Single Volume Size

200 TB (32GB RAM required, for RAID 5 or RAID 6 groups only)
108 TB

Hot Swappable Drive

External Ports

RJ-45 1GbE LAN Port
4 (with Link Aggregation / Failover support)

USB 3.0 Port
2

Expansion Port
2

PCIe

PCIe Expansion
1 x Gen3 x8 slot (x8 link)

Add-in-card support

M2D18 – Dual M.2 SATA/NVMe SSD adapter card for SSD cache
PCIe Network Interface Card(Learn more)

File System

Internal Drives

Btrfs
EXT4

External Drives

Btrfs
EXT4
EXT3
FAT
NTFS
HFS+
exFAT*

Notes
exFAT Access is purchased separately in Package Center.

Appearance

Size (Height x Width x Depth)
270 mm x 300 mm x 340 mm

Weight
9.8 kg

Others

System Fan
120 mm x 120 mm x 2 pcs

Fan Speed Mode

Full-Speed Mode
Cool Mode
Quiet Mode

Easy Replacement System Fan

Power Recovery

Noise Level*
22.3 dB(A)

Scheduled Power On/Off

Wake on LAN/WAN

Power Supply Unit / Adapter
500W

AC Input Power Voltage
100V to 240V AC

Power Frequency
50/60 Hz, Single Phase

Power Consumption*
108.2 W (Access)53.4 W (HDD Hibernation)

British Thermal Unit
369.4 BTU/hr (Access)182.3 BTU/hr (HDD Hibernation)

Environment Temperature

Operating Temperature
5°C to 40°C (40°F to 104°F)

Storage Temperature
-20°C to 60°C (-5°F to 140°F)

Relative Humidity
5% to 95% RH

Certification

EAC
VCCI
RCM
KC
FCC
CE
BSMI

Warranty
5 Years

Notes

Power consumption is measured when fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in idle; Two G.R.A.S. Type 40AE microphones, each set up at 1 meter away from the Synology NAS front and rear; Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%

DSM Specifications( See more )

Storage Management

Maximum Internal Volume Number
1024

Maximum iSCSI Target Number
256

Maximum iSCSI LUN
512

iSCSI LUN Clone/Snapshot, Windows ODX

SSD Read/Write Cache(White Paper)

SSD TRIM

RAID Group

Supported RAID Type

RAID F1
Basic
JBOD
RAID 0
RAID 1
RAID 5
RAID 6
RAID 10

RAID Migration

Basic to RAID 1
Basic to RAID 5
RAID 1 to RAID 5
RAID 5 to RAID 6

Volume Expansion with Larger HDDs

RAID F1
RAID 1
RAID 5
RAID 6

Volume Expansion by Adding a HDD

RAID F1
RAID 5
RAID 6
JBOD

Global Hot Spare Supported RAID Type

RAID F1
RAID 1
RAID 5
RAID 6
RAID 10

File Sharing Capacity

Maximum Local User Accounts
16000

Maximum Local Groups
512

Maximum Shared Folder
512

Maximum Shared Folder Sync Tasks
16

Maximum Concurrent CIFS/AFP/FTP Connections
2000

Maximum Concurrent CIFS/AFP/FTP Connections (with RAM expansion)
10000

Windows Access Control List (ACL) Integration

NFS Kerberos Authentication

High Availability Manager

Log Center

Syslog Events per Second
3000

Virtualization

VMware vSphere 6 with VAAI

Windows Server 2012

Windows Server 2012 R2

Citrix Ready

OpenStack

Add-on Packages(learn more about the complete add-on package list)

Antivirus by McAfee (Trial)

Central Management System

Chat

Maximum Users
4000

Notes

The number of concurrent HTTP connections for Chat was configured to the maximum.
CPU and RAM usage were both under 80% when the number of maximum users was reached.
For tested models with expandable memory, the maximum amount of RAM was installed.

Cloud Station Server

Maximum Number of Concurrently Connected Devices
2000

Maximum Number of Concurrently Connected Devices (with RAM expansion)
10000

Maximum Number of Hosted Files (btrfs)
1,000,000

Maximum Number of Hosted Files (ext4)
1,000,000

Notes

The maximum number of concurrently connected devices refers to the maximum number of devices that can remain connected at the same time.
The maximum number of hosted files refers to the maximum number of files that can be indexed and hosted by the Cloud Station Server service. RAM expansion was not used during testing.
Non-encrypted shared folders were used during the aforementioned testing.

Document Viewer

Download Station

Maximum Concurrent Download Tasks
80

Drive

Maximum Number of Hosted Files
3,000,000

Maximum Number of Concurrent Connections for PC Clients
1,800

Notes

The Btrfs file system was used for the purpose of testing.
The maximum number of concurrent connections refers to the maximum number of connections that can be maintained when the maximum number of hosted files was reached.
The maximum number of hosted files refers to the maximum number of files that can be indexed and hosted by the Drive service.
For tested models with expandable memory, the maximum amount of RAM was installed.
Non-encrypted shared folders were used during the aforementioned testing.

exFAT Access (optional)

MailPlus / MailPlus Server

Free Email Accounts
5(Licenses required for additional accounts)

Recommended MailPlus Client Number
Up to 400 (Btrfs) / 400 (EXT4)

Maximum Server Performance
3,283,000 (Btrfs) / 1,992,000 (EXT4) emails per day, approx. 100.2 GB (Btrfs) / 60.8 GB (EXT4)

Notes

The CPU and RAM usages were both under 80% when testing recommended client numbers.
For tested models with expandable memory, the maximum amount of RAM was installed.
Read-write SSD cache was enabled in 5-bay (and above) NAS models with 2 SSDs units installed.
The performance of the mail system will slightly decrease in high-availability mode due to data synchronization between the two servers.
Functions that were enabled in all of the tests above: anti-spam, anti-virus, DNSBL, greylist, content scan, full-text search (English only).

Media Server

DLNA Compliance

Moments

Facial recognition

Subject recognition

Office

Maximum Users
2800

Notes

Multiple files were opened for testing and each file was edited by 30 users simultaneously.
CPU and RAM usage were both under 80% when the number of maximum users was reached.
For tested models with expandable memory, the maximum amount of RAM was installed.
Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM

PetaSpace

Snapshot Replication

Maximum Snapshots per Shared Folder
1024

Maximum Snapshots of all Shared Folder
65536

Surveillance Station

Maximum IP cam (Licenses required)
75 (including 2 Free License)(See All Supported IP Cameras)

Total FPS (H.264)*
2250 FPS @ 720p (1280×720)1050 FPS @ 1080p (1920×1080)600 FPS @ 3M (2048×1536)500 FPS @ 5M (2591×1944)500 FPS @ 4K (3840×2160)

Total FPS (H.265)*
2250 FPS @ 720p (1280×720)2250 FPS @ 1080p (1920×1080)2250 FPS @ 3M (2048×1536)1875 FPS @ 5M (2591×1944)975 FPS @ 4K (3840×2160)

Total FPS (MJPEG)*
900 FPS @ 720p (1280×720)450 FPS @ 1080p (1920×1080)280 FPS @ 3M (2048×1536)200 FPS @ 5M (2591×1944)

Notes
Surveillance Station throughput is tested with Axis network camera, using continuous recording with live view from Surveillance Station and motion detection by camera. Live view and recording are sharing the same stream from the camera.

Video Station

Video Transcoding
Group 1 – Type 1(See more)

Maximum Transcoding Channel Number
1 channel, 30 FPS @ 1080p(1920×1080), H.264 (AVC)/MPEG-4 Part 2 (XVID, DIVX5)/MPEG-2/VC-1

Virtual Machine Manager

Maximum Virtual DSM Number (Licenses required)
8 (including 1 Free License)(Learn more)

Notes
Virtual Machine Manager is not supported on hosts running Synology High Availability.

VPN Server

Maximum Connections
30

Environment & Packaging

Environment
RoHS Compliant

Packaging Content

Main Unit X 1
Accessory Pack X 1
AC Power Cord X 1
RJ-45 LAN Cable X 2
Quick Installation Guide X 1