DiskStation DS1817

Performance Compatibility Downloads Compare

DiskStation DS1817

Powerful all-in-one private cloud solution

Features
Specs

High capacity, fully-featured powerhouse

DS1817 is a powerful, scalable 8-bay NAS delivering outstanding data transfer rates. With built-in dual 10GbE LAN ports in addition to dual Gigabit ports, DS1817 supports Link Aggregation and failover functions for maximum performance and service continuity.

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Network

Two built-in 10GBASE-T LAN ports

Memory

4GB DDR3L, up to 8GB

High Performance

1,577 MB/s sequential reading

Scalability

Up to 18 drives with two DX517 expansion units

Engineered for reliability, backed by Synology

DS1817 is designed to reliably store your data and is backed by Synology's three-year hardware warranty. An optional two-year extended warranty is available in select regions for up to five years of coverage. Learn more

Ultimate file management and sharing

File Station is a web-based, fast and secure management tool built to allow easy, drag-and-drop operations without requiring any complex setup on Mac or PC. Advanced search and filtering tools allow for easy organization and file sharing. For complete compatibility, DS1817 supports the following protocols: AFP, FTP, iSCSI, NFS, SMB, and WebDAV.

Maximize system uptime with Synology High Availability (SHA)

Enjoy a complete hardware and data redundancy solution with Synology High Availability (SHA) in case of unforeseen disasters. After joining two Synology NAS devices to form a high-availability cluster, the NAS acting as the active server will handle all data operations and services, while cloning the entire system to the passive standby server.

Automatic failover

Real-time protection, minimum data loss

No-hassle installation and maintenance

Maximize service availability for virtualization through iSCSI

Access and sync your files seamlessly

Synology Drive provides a built-in universal portal to access your data anytime and anywhere, and synchronize all your files across platforms, including Windows, macOS, Linux, Android, and iOS. Learn more

Sync files on demand: Save the storage space and network bandwidth of your PC.

Go back in time: Easily retrieve previous versions of your shared files.

Back up your data: Protect your files with scheduled backups or in real-time.

Fully certified storage virtualization solutions

Synology iSCSI storage fully supports most virtualization solutions to enhance work efficiency with easy management interface. VMware vSphere 6 and VAAI integration helps offload storage operations and optimizes computation efficiency. Windows Offloaded Data Transfer (ODX) speeds up data transfer and migration rate. OpenStack Cinder support turns your Synology NAS into a block-based storage component.

Powered by Synology DSM

Surveillance Station

Complete surveillance solution for recording, monitoring, and management.

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Desktop Backup

Simplified backup solution for your Mac, PC, and mobile devices.

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Public Cloud Integration

Backup and synchronize data easily between your public cloud accounts and your NAS.

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DSM UI

Award-winning operating system with an intuitive user interface and powerful capabilities.

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Security

Comprehensive built-in security tools are constantly updated to protect your devices against evolving threats.

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Multimedia

Complete multimedia solution for management, streaming, and playback.

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1 Status indicator
2 Alert indicator
3 Drive status indicator
4 Drive tray lock

5 Power button and indicator
6 LAN indicator
7 System fan
8 Power port

9 Kensington Security Slot
10 USB 3.0 port
11 10GbE RJ-45 port
12 1GbE RJ-45 port

13 eSATA port
14 Reset button

Hardware Specs
Software Specs

Hardware Specifications
CPU
CPU	CPU Model	Annapurna Labs Alpine AL-314
	CPU Architecture	32-bit
	CPU Frequency	4-core 1.7 GHz
	Hardware Encryption Engine
Memory
Memory	System Memory	4 GB DDR3L non-ECC SODIMM
	Memory Module Pre-installed	4 GB (4 GB x 1)
	Total Memory Slots	2
	Maximum Memory Capacity	8 GB (4 GB x 2)
	Notes	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. 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.
Storage
Storage	Drive Bays	8
	Maximum Drive Bays with Expansion Unit	18 (DX517 x 2)
	Compatible Drive Type* (See all supported drives)	3.5" SATA HDD 2.5" SATA HDD 2.5" SATA SSD
	Maximum Single Volume Size*	108 TB
	Hot Swappable Drive
	Notes	"Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay. Each internal volume (may consist of multiple drives) is expandable up to 108TB.
External Ports
External Ports	RJ-45 1GbE LAN Port	2 (with Link Aggregation / Failover support)
	RJ-45 10GbE LAN Port	2 (with Link Aggregation / Failover support)
	USB 3.0 Port	2
	eSATA Port	2
File System
File System	Internal Drives	EXT4
	External Drives	EXT4 EXT3 FAT NTFS HFS+ exFAT*
	Notes	exFAT Access is purchased separately in Package Center.
Appearance
Appearance	Size (Height x Width x Depth)	157 mm x 340 mm x 233 mm
	Weight	5.31 kg
Others
Others	System Fan	120 mm x 120 mm x 2 pcs
	Fan Speed Mode	Cool Mode Quiet Mode
	Easy Replacement System Fan
	Power Recovery
	Noise Level*	24.2 dB(A)
	Scheduled Power On / Off
	Wake on LAN / WAN
	Power Supply Unit / Adapter	250 W
	AC Input Power Voltage	100 V to 240 V AC
	Power Frequency	50/60 Hz, Single Phase
	Power Consumption*	59.1 W (Access) 26.4 W (HDD Hibernation)
	British Thermal Unit	201.66 BTU/hr (Access) 90.08 BTU/hr (HDD Hibernation)
	Notes	Power consumption is measured when it is 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%
Temperature
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
Certification	EAC CCC RCM KC FCC CE BSMI
Warranty
Warranty	3-year hardware warranty, extendable to 5-year coverage - EW201
	Notes	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment
Environment	RoHS Compliant
Packaging Content
Packaging Content	Main Unit X 1 Welcome Note X 1 Accessory Pack X 1 AC Power Cord X 1 RJ-45 LAN Cable X 2
Optional Accessories
Optional Accessories	DDR3 non-ECC SODIMM: RAM1600DDR3-4G Expansion Units: DX517 VisualStation: VS960HD/VS360HD Surveillance Device License Pack

DSM Specifications
Storage Management
Storage Management	Maximum Internal Volume Number	64
	Maximum iSCSI Target Number	128
	Maximum iSCSI LUN	256
	iSCSI LUN Clone/Snapshot, Windows ODX
	SSD Read / Write Cache (White Paper)
	SSD TRIM
	Supported RAID Type	Synology Hybrid RAID 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	Synology Hybrid RAID RAID 1 RAID 5 RAID 6 RAID 10
	Volume Expansion by Adding a HDD	Synology Hybrid RAID JBOD RAID 5 RAID 6
	Global Hot Spare Supported RAID Type	Synology Hybrid RAID RAID 1 RAID 5 RAID 6 RAID 10
File Services
File Services	File Protocol	CIFS/AFP/NFS/FTP/WebDAV
	Maximum Concurrent CIFS/AFP/FTP Connections	500
	Maximum Concurrent CIFS/AFP/FTP Connections (with RAM expansion)	1,000
	Windows Access Control List (ACL) Integration
	NFS Kerberos Authentication
	Notes	Regarding data concerning tests with RAM expansion, all memory slots are installed with the maximum capacity of supported RAM.
Account & Shared Folder
Account & Shared Folder	Maximum Local User Accounts	2,048
	Maximum Local Groups	256
	Maximum Shared Folder	256
	Maximum Shared Folder Sync Tasks	8
High Availability
High Availability	Synology High Availability
Log Center
Log Center
	Syslog Events per Second	400
Virtualization
Virtualization	VMware vSphere 6 with VAAI
	Windows Server 2012
	Windows Server 2012 R2
	Windows Server 2016
	Windows Server 2019
	Citrix Ready
	OpenStack
General Specifications
General Specifications	Networking Protocols	SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
	Supported Browsers	Google Chrome Firefox Microsoft Edge Internet Explorer 10 onwards Safari 10 onwards Safari (iOS 10 onwards) Google Chrome (Android 6.0 onwards)
	Supported Language	English, 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, 简体中文
Add-on Packages view the complete package list
Central Management System
Central Management System
Synology Chat
Synology Chat
	Maximum Users	800
	Notes	The number of concurrent HTTP connections for Synology Chat was configured to the maximum. For tested models with expandable memory, the maximum amount of RAM was installed.
Cloud Station Server
Cloud Station Server
	Recommended Number of Hosted Files	500,000
	Recommended Number of Concurrent Sync Clients	450 (the number of connections that can be maintained when the recommended number of hosted files was reached)
	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.
Download Station
Download Station
	Maximum Concurrent Download Tasks	50
exFAT Access (Optional)
exFAT Access (Optional)
Media Server
Media Server
	DLNA Compliance
Moments
Moments
	Facial Recognition
Surveillance Station
Surveillance Station
	Maximum IP cam (Licenses required)	30 (including 2 Free License) (See All Supported IP Cameras)
	Total FPS (H.264)	900 FPS @ 720p (1280x720) 480 FPS @ 1080p (1920x1080) 300 FPS @ 3M (2048x1536) 250 FPS @ 5M (2591x1944)
	Total FPS (MJPEG)	480 FPS @ 720p (1280x720) 300 FPS @ 1080p (1920x1080) 250 FPS @ 3M (2048x1536) 200 FPS @ 5M (2591x1944)
	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. The maximum channel number also includes devices installed on Virtual DSM. Total FPS may be affected by other services running at the same time (e.g., archive tasks performed by Archive Vault).
Synology Drive
Synology Drive
	Recommended Number of Hosted Files	500,000 (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 Clients	450 (the number of connections that can be maintained when the recommended number of hosted files was reached)
	Notes	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. EXT4 file system and non-encrypted shared folders were used during the aforementioned testing.
Synology Office
Synology Office
	Maximum Users	400
	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
Video Station
Video Station
	Video Transcoding	Group 1 - Type 2 (See more)
	Maximum Transcoding Channel Number	1 channel, 30 FPS @ 720p (1280x720), H.264 (AVC)/MPEG-4 Part 2 (XVID, DIVX5)/MPEG-2/VC-1
VPN Server
VPN Server
	Maximum Connections	20

Notes:

Model specifications are subject to change without prior notice.
The figures are based on Synology internal testing. Each performance test is done individually. No other services or applications are processed at the same time.