DS1817+

DiskStation DS1817+

High performance NAS optimized for encryption and intensive tasks

Centralized storage solution with outstanding performance

Synology DiskStation DS1817+ is a 8-bay NAS powered by a quad-core CPU with AES-NI hardware encryption engine. Coming with quad 1GbE LAN ports, it can be installed with a 10GbE network interface card (NIC) or a dual M.2 SSD adapter card, thereby enhancing network speeds or boosting performance with SSD cache.

CPU
Quad-core 2.4GHz

Memory
2GB/8GB DDR3, up to 16GB (dual channel)

High Performance
1,179 MB/s sequential reading

Scalability
Up to 18 drives with two DX517 expansion units

Supercharge your storage with speedy performance

Equipped with dual-channel memory and a PCIe slot, DS1817+ supports installing the dual M.2 SSD adapter card, M2D17, or the 10GbE NIC, for high-IOPS system cache and ultra-fast data transmission respectively.

M2D17

Dual M.2 SATA SSD slot, compatible with 2280/2260/2242 form factors

10GbE

10GbE network capacity for bandwidth intensive environments

RAM

Dual-channel memory that boosts the performance by 20%

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.

Next-generation file system for better data protection

The Btrfs file system introduces advanced storage technologies and optimized snapshots to prevent data corruption and reduce maintenance overhead. While ensuring high-level data integrity, it also offers flexible, efficient data protection and recovery tools.

Flexible Shared Folder / User Quota System provides comprehensive quota control on user accounts and shared folders

Snapshot Replication provides schedulable and storage capacity-saving data protection with 1,024 shared folder backups and 65,000 system-wide snapshots

 
File- or folder-level data restoration accelerates data recovery, providing more flexibility for businesses

 
Automatic file self-healing detects and recovers corrupted files without user intervention

Ultimate file management and sharing

File Station is a web-based, fast and secure management tool built to allow easy, drag-and-drop operation without requiring any complex setup on Mac or PC. Advanced search and filtering tools allow for easy organization and sharing of files with just a link. Supports SMB, FTP, AFP, NFS, WebDAV, compatible with any environment.

Real-time collaboration on your private cloud

Office is a collaboration package combining the convenience and usability of public clouds with the data privacy and security guaranteed by private clouds. It allows you to work seamlessly together on documents and spreadsheets in a protected environment. Real-time collaboration on the same online documents to boost productivity. Version control for you to navigate all the changes and retrieve previous versions with just a click. Instant communication on Synology Chat during the editing of documents or spreadsheets.

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.

Surveillance Station

Complete surveillance solution for recording, monitoring, and management.

Hyper Backup

Store multiple backup versions with block-level incremental data backup and cross-version deduplication.

DSM UI

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

Security

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

All-in-one server

Save additional investment by integrating various network services, web/mail services, management applications into your NAS.

Desktop Backup

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

Hardware Specifications 
CPU 
CPU ModelIntel Atom C2538
CPU Architecture64-bit
CPU FrequencyQuad Core 2.4 GHz
Hardware Encryption Engine (AES-NI) 
Memory 
System Memory2/8 GB DDR3
Memory Module Pre-installed2GB (1 x 2GB) / 8GB (2 x 4GB)
Total Memory Slots2
Memory Expandable up to16 GB (8 GB x 2)
Storage 
Drive Bays8
Maximum Drive Bays with Expansion Unit18
Compatible Drive Type* (See all supported drives)3.5" SATA HDD
 2.5" SATA HDD
 2.5" SATA SSD
  
Maximum Internal Raw Capacity96 TB (12 TB drive x 8) (Capacity may vary by RAID types)
Maximum Raw Capacity with Expansion Units216 TB (96 TB + 12 TB drive x 10) (Capacity may vary by RAID types)
Maximum Single Volume Size108 TB
Hot Swappable Drive 
Notes"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.
 Expansion of the internal volume is only supported if the combined single volume size does not exceed the maximum limit of 108TB.
  
External Ports 
RJ-45 1GbE LAN Port4 (with Link Aggregation / Failover support)
USB 3.0 Port4
eSATA Port2
PCIe 
PCIe Expansion1 x Gen2 x8 slot (x4 link)
Add-in-card supportM2D17 - Dual M.2 SSD adapter card for SSD cache
 PCIe Network Interface Card (Learn more)
  
NotesDS1817+ with M2D17 can only support M.2 SATA SSD. M.2 NVMe/AHCI PCIe SSD is not supported.
File System 
Internal DrivesBtrfs
 EXT4
  
External DrivesBtrfs
 EXT4
 EXT3
 FAT
 NTFS
 HFS+
 exFAT*
  
NotesexFAT Access is purchased separately in Package Center.
Appearance 
Size (Height x Width x Depth)166 mm x 343 mm x 243 mm
Weight6.0 kg
Others 
System Fan120 mm x 120 mm x 2 pcs
Fan Speed ModeCool Mode
 Quiet Mode
  
Easy Replacement System Fan 
Brightness adjustable front LED indicators 
Power Recovery 
Noise Level*22.2 dB(A)
Scheduled Power On/Off 
Wake on LAN/WAN 
Power Supply Unit / Adapter250W
AC Input Power Voltage100V to 240V AC
Power Frequency50/60 Hz, Single Phase
Power Consumption*61.5 W (Access)
 31.6 W (HDD Hibernation)
British Thermal Unit156.55 BTU/hr (Access)
 86.09 BTU/hr (HDD Hibernation)
Environment Temperature 
Operating Temperature5°C to 40°C (40°F to 104°F)
Storage Temperature-20°C to 60°C (-5°F to 140°F)
Relative Humidity5% to 95% RH
CertificationEAC
 VCCI
 CCC
 RCM
 KC
 FCC
 CE
 BSMI
  
Warranty3 Year Hardware Warranty, Extendable to 5 Year Coverage - EW201
NotesPower 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 Number512
Maximum iSCSI Target Number32
Maximum iSCSI LUN256
iSCSI LUN Clone/Snapshot, Windows ODX 
SSD Read/Write Cache (White Paper)  
SSD TRIM 
Supported RAID TypeSynology Hybrid RAID
 Basic
 JBOD
 RAID 0
 RAID 1
 RAID 5
 RAID 6
 RAID 10
  
RAID MigrationBasic to RAID 1
 Basic to RAID 5
 RAID 1 to RAID 5
 RAID 5 to RAID 6
  
Volume Expansion with Larger HDDsSynology Hybrid RAID
 RAID 1
 RAID 5
 RAID 6
  
Volume Expansion by Adding a HDDSynology Hybrid RAID
 RAID 5
 RAID 6
 JBOD
  
Global Hot Spare Supported RAID TypeSynology Hybrid RAID
 RAID 1
 RAID 5
 RAID 6
 RAID 10
  
File Sharing Capacity 
Maximum Local User Accounts2048
Maximum Local Groups256
Maximum Shared Folder512
Maximum Shared Folder Sync Tasks8
Maximum Concurrent CIFS/AFP/FTP Connections512(2GB) / 2048(8GB)
Windows Access Control List (ACL) Integration 
NFS Kerberos Authentication 
High Availability Manager 
Log Center 
Syslog Events per Second800
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 Users1500
NotesThe 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 Devices512 (2GB) / 2000 (8GB)
Maximum Number of Concurrently Connected Devices (with RAM expansion)2000
Maximum Number of Synced Files (btrfs)1,000,000 / single file reaction time 827 (2GB) / 872 (8GB) ms
Maximum Number of Synced Files (ext4)1,000,000 / single file reaction time 533 (2GB) / 512 (8GB) ms
NotesThe maximum number of concurrently connected devices refers to the maximum number of devices that can remain connected at the same time. For more information on file processing capability, please refer to the reaction time for file processing.
 File reaction time refers to the preparation time required for other devices to start downloading a 10KByte file from a Synology NAS after the file has been added to the NAS. RAM expansion was not used during testing.
 Non-encrypted shared folders were used during the aforementioned testing.
  
Document Viewer 
Download Station 
Maximum Concurrent Download Tasks80
Drive 
Maximum Number of Synced Files1,000,000 / single file reaction time 437 ms
Maximum Number of Concurrent Connections for PC Clients550
NotesThe Btrfs file system was used for the purpose of testing.
 The maximum number of concurrent connections refers to the maximum number of connections that could be maintained when the maximum number of synced files was reached.
 File reaction time refers to the preparation time required for other devices to start downloading a 10KByte file from a Synology NAS after the file has been added to the NAS.
 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 Accounts5 (Licenses required for additional accounts)
Recommended MailPlus Client NumberUp to 90(btrfs)/100(ext4)
Maximum Server Performance825,000 emails per day, approx. 25.18 GB
NotesThe 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 Users1800
NotesMultiple 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
  
Snapshot Replication 
Maximum Snapshots per Shared Folder1024
Maximum Snapshots of all Shared Folder65536
Surveillance Station 
Maximum IP cam (Licenses required)40 (including 2 Free License) (See All Supported IP Cameras)
Total FPS (H.264)*1200 (2GB RAM) / 1200 (8GB RAM) FPS @ 720p (1280x720)
 900 (2GB RAM) / 1080 (8GB RAM) FPS @ 1080p (1920×1080)
 320 (2GB RAM) / 480 (8GB RAM) FPS @ 3M (2048x1536)
 270 (2GB RAM) / 280 (8GB RAM) FPS @ 5M (2591x1944)
 120 (2GB RAM) / 160 (8GB RAM) FPS @ 4K (3840x2160)
Total FPS (H.265)*1200 (2GB RAM) / 1200 (8GB RAM) FPS @ 720p (1280x720)
 1200 (2GB RAM) / 1200 (8GB RAM) FPS @ 1080p (1920×1080)
 560 (2GB RAM) / 1120 (8GB RAM) FPS @ 3M (2048x1536)
 300 (2GB RAM) / 760 (8GB RAM) FPS @ 5M (2591x1944)
 200 (2GB RAM) / 480 (8GB RAM) FPS @ 4K (3840x2160)
Total FPS (MJPEG)*540 (2GB RAM) / 760 (8GB RAM) FPS @ 720p (1280x720)
 200 (2GB RAM) / 400 (8GB RAM) FPS @ 1080p (1920×1080)
 150 (2GB RAM) / 280 (8GB RAM) FPS @ 3M (2048x1536)
 90 (2GB RAM) / 200 (8GB RAM) 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.
Video Station 
Video 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 Manager 
Maximum Virtual DSM Number (Licenses required)4 (including 1 Free License) (Learn more)
NotesVirtual Machine Manager is not supported on hosts running Synology High Availability.
VPN Server 
Maximum Connections20
Environment & Packaging 
EnvironmentRoHS Compliant
Packaging ContentMain Unit X 1
 Accessory Pack X 1
 AC Power Cord X 1
 RJ-45 LAN Cable X 2
 Quick Installation Guide X 1