• Synology RackStation RS3617xs+ 12-Bay NAS Enclosure Front.jpg
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Synology RackStation RS3617xs+ 12-Bay NAS Enclosure

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Synology RackStation RS3617xs+ provides reliable, superior-performance network attached storage solution for large scale businesses with comprehensive business applications. With built-in 10GBase-T support and scalability of up to 36 drives, RS3617xs+ simplifies data management, optimizes virtualization environments, and rapidly expands storage capacity with minimal time investment in setup and maintenance. 


Blazing performance

RS3617xs+ comes with two 10GBase-T and four 1GbE RJ-45 ports by default, bringing flexible network configuration and bandwidth utilization. With the help of an advanced processor, RS3617xs+ delivers blazing performance.

Btrfs - next-generation storage efficiency

RS3617xs+ integrates the Btrfs file system, bringing the advanced storage technologies to meet the management needs of modern large scale businesses:

Virtualization ready

RS3617xs+ provides seamless storage solutions for virtualization environments. As the centralized storage of a virtual environment, RS3617xs+ enables virtual machine migration, allowing movement from server to server whilst eliminating service downtime and disruption to user.

Reliability, availability & disaster recovery

System reliability is of paramount importance to businesses which depend upon their commercial servers every day. RS3617xs+ responds to these concerns with wide-ranging availability and redundancy features.


Hardware Specifications
CPUCPU ModelIntel Xeon D-1541

CPU Architecture64-bit

CPU Frequency8-Core 2.1 (base) / 2.7 (turbo) GHz

Hardware Encryption Engine (AES-NI)
MemorySystem Memory8 GB DDR4 ECC UDIMM

Memory Module Pre-installed8 GB (8 GB x 1)

Total Memory Slots4

Memory Expandable up to64 GB (16 GB x 4)

  • Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance.
  • Please select Synology memory modules for optimum compatibility and reliability. Synology will not provide complete product warranty or technical support if non-Synology memory modules are used for memory expansion.
StorageDrive Bays16

Maximum Drive Bays with Expansion Unit40

Compatible Drive Type* (See all supported drives) 
  • 3.5" SATA HDD
  • 2.5" SATA HDD
  • 2.5" SATA SSD

Maximum Internal Raw Capacity256 TB (16 TB drive x 16) (Capacity may vary by RAID types)

Maximum Raw Capacity with Expansion Units640 TB (256 TB + 16 TB drive x 24) (Capacity may vary by RAID types)

Maximum Single Volume Size*
  • 200 TB (32 GB RAM required, for RAID 5 or RAID 6 groups only)
  • 108 TB

Hot Swappable Drive

  • "Compatible drive type" indicates the drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay.
  • The maximum raw capacity is not limited by the maximum single volume size. Synology NAS models may utilize capacities over the maximum single volume size as long as each volume created is below the limit. (Learn more) 
  • Each internal volume (may consist of multiple drives) is expandble up to 108TB (with memory less than 32GB) or 200TB (with memory equal to or greater than 32GB).
External PortsRJ-45 1GbE LAN Port4 (with Link Aggregation / Failover support)

RJ-45 10GbE LAN Port2 (with Link Aggregation / Failover support)

USB 3.0 Port2

Expansion Port2
PCIePCIe Expansion2 x Gen3 x8 slots (x8 link)

Add-In-Card Support
  • PCIe Network Interface Card (Learn more) 
  • M2D18 - Dual M.2 SATA SSD adapter card for SSD cache

NotesRS4017xs+ with M2D18 can only support M.2 SATA SSD. M.2 NVMe/AHCI PCIe SSD is not supported.
File SystemInternal Drives
  • Btrfs
  • EXT4

External Drives
  • Btrfs
  • EXT4
  • EXT3
  • FAT
  • NTFS
  • HFS+
  • exFAT*

NotesexFAT Access is purchased separately in Package Center.
AppearanceForm Factor (RU)3U

Size (Height x Width x Depth)132.3 mm x 482 mm x 656.5 mm

Weight17.4 kg

Rack Installation Support*4-post 19" rack (Synology Rail Kit - RKS1317)

NotesThe rail kit is sold separately
OthersSystem Fan80 mm x 80 mm x 3 pcs

Fan Speed Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode

Easy Replacement System Fan

Power Recovery

Noise Level*44.7 dB(A)

Scheduled Power On / Off

Wake on LAN / WAN

Power Supply Unit / Adapter800 W

Redundant Power Supply

AC Input Power Voltage100 V to 240 V AC

Power Frequency50/60 Hz, Single Phase

Power Consumption*136.4 W (Access)
 69.2 W (HDD Hibernation)

British Thermal Unit465.7 BTU/hr (Access)
 236.3 BTU/hr (HDD Hibernation)

  • Power consumption is measured when it's fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
  • Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%
TemperatureOperating Temperature5°C to 35°C (40°F to 95°F)

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

Relative Humidity5% to 95% RH
  • EAC
  • VCCI
  • CCC
  • RCM
  • KC
  • FCC
  • CE
  • BSMI
Warranty5 Years

NotesThe warranty period starts from the purchase date as stated on your purchase receipt.
EnvironmentRoHS Compliant
Packaging Content
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1
Optional Accessories
  • D4EC-2666-8G DDR4 ECC UDIMM*
  • D4EC-2400-16G DDR4 ECC UDIMM*
  • Surveillance Device License Pack
  • Expansion Unit: RX1217/RX1217RP X 2
  • Synology Ethernet Adapter E10G17-F2 
  • Synology Ethernet Adapter E10G18-T1 
  • Synology Ethernet Adapter E10G18-T2 
  • Synology M2D18 M.2 SSD adapter card
  • Synology Rail Kit Sliding - RKS1317 
  • VS360HD
  • VS960HD

NotesAll memory modules will operate at the maximum frequency specified by the CPU manufacturer.

Software Specifications
Storage ManagementMaximum Internal Volume Number256

Maximum iSCSI Target Number256

Maximum iSCSI LUN512

iSCSI LUN Clone/Snapshot, Windows ODXYes

SSD Read / Write Cache (White Paper) Yes


RAID GroupYes

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
  • RAID 10

Volume Expansion by Adding a HDD
  • RAID F1
  • JBOD
  • RAID 5
  • RAID 6

Global Hot Spare Supported RAID Type
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
File ServicesFile ProtocolCIFS/AFP/NFS/FTP/WebDAV

Maximum Concurrent CIFS/AFP/FTP Connections2,000

Maximum Concurrent CIFS/AFP/FTP Connections (with RAM expansion)10,000

Windows Access Control List (ACL) IntegrationYes

NFS Kerberos AuthenticationYes
Account & Shared FolderMaximum Local User Accounts16,000

Maximum Local Groups512

Maximum Shared Folder512

Maximum Shared Folder Sync Tasks32
High AvailabilitySynology High AvailabilityYes
Log CenterSyslog Events per Second3,000
VirtualizationVMware vSphere 6 with VAAIYes

Windows Server 2012Yes

Windows Server 2012 R2Yes

Windows Server 2016Yes

Citrix ReadyYes

General SpecificationsNetworking ProtocolsSMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV

Supported Browsers
  • Chrome
  • Firefox
  • Edge
  • Internet Explorer 10 onwards
  • Safari 10 onwards
  • Safari (iOS 10 onwards)
  • Chrome (Android 6.0 onwards)

Supported LanguageEnglish, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český, ภาษาไทย日本語한국어繁體中文简体中
Add-on Packages
Antivirus by McAfee (Trial)Yes
Central Management SystemYes
Synology ChatMaximum Users6,000

  • The number of concurrent HTTP connections for Synology 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 ServerRecommended Number of Hosted Files3,000,000

Recommended Number of Concurrent Sync Clients2,000 (the number of connections that can be maintained when the recommended number of hosted files was reached)

  • 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 ViewerYes
Download StationMaximum Concurrent Download Tasks80
exFAT Access (Optional)Yes
Synology MailPlus / MailPlus ServerFree Email Accounts5 (Licenses required for additional accounts) 

Maximum Number of Concurrent Users1,100

Maximum Server Performance4,312,000 emails per day, approx. 131GB

  • The CPU and RAM usage were both under 80% when testing the maximum number of concurrent users.
  • 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 ServerDLNA ComplianceYes
MomentsFacial RecognitionYes

Subject RecognitionYes

Auto Color & RotateYes

Moments SelectYes
Snapshot ReplicationMaximum Snapshots per Shared Folder1,024

Maximum of System Snapshots65,536
Surveillance StationMaximum IP cam (Licenses required) 90 (including 2 Free License) (See All Supported IP Cameras) 

Total FPS (H.264)*2700 FPS @ 720p (1280x720)
 2250 FPS @ 1080p (1920x1080)
 900 FPS @ 3M (2048x1536)
 800 FPS @ 5M (2591x1944)
 440 FPS @ 4K (3840x2160)

Total FPS (H.265)*2700 FPS @ 720p (1280x720)
 2700 FPS @ 1080p (1920x1080)
 2340 FPS @ 3M (2048x1536)
 1260 FPS @ 5M (2591x1944)
 800 FPS @ 4K (3840x2160)

Total FPS (MJPEG)*1200 FPS @ 720p (1280x720)
 600 FPS @ 1080p (1920x1080)
 350 FPS @ 3M (2048x1536)
 220 FPS @ 5M (2591x1944)

NotesSurveillance 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.
Synology DriveRecommended Number of Hosted Files5,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)

Recommended Number of Concurrent Sync Clients2,000 (the number of connections that can be maintained when the recommended number of hosted files was reached)

  • For tested models with expandable memory, the maximum amount of RAM was installed.
  • Exceeding the limits above may result in longer response time in file operations.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
Synology OfficeMaximum Users2,900

  • 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
Video StationVideo TranscodingGroup 1 - Type 1 (See more) 

Maximum Transcoding Channel Number1 channel, 30 FPS @ 1080p(1920×1080), H.264 (AVC)/MPEG-4 Part 2 (XVID, DIVX5)/MPEG-2/VC-1
Virtual Machine ManagerRecommended Virtual Machine Instances16 (Learn more) 

Recommended Virtual DSM Number (Licenses required) 16 (including 1 Free License)

NotesThe specifications vary depending on system configuration and memory size.
VPN ServerMaximum Connections40


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