Specifications
Hardware Specifications
CPU
CPU Model
- AMD Ryzen R1600
CPU Quantity
- 1
CPU Architecture
- 64-bit
CPU Frequency
- 2-core 2.6 (base) / 3.1 (turbo) GHz
Hardware Encryption Engine (AES-NI)
- Yes
Memory
System Memory
- 8 GB DDR4 ECC SODIMM
Memory Module Pre-installed
- 8 GB (8 GB x 1)
Total Memory Slots
- 2
Maximum Memory Capacity
- 32 GB (16 GB x 2)
Notes
- 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.
Storage
Drive Bays
- 5
Maximum Drive Bays with Expansion Unit
- 15 (DX517 x 2)
M.2 Drive Slots
- 2 (NVMe)
Compatible Drive Type
- 3.5" SATA HDD
- 2.5" SATA SSD
- M.2 2280 NVMe SSD
Hot Swappable Drive
- Yes
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.
External Ports
RJ-45 1GbE LAN Port
- 4 (with Link Aggregation / Failover support)
USB 3.2 Gen 1 Port
- 2
eSATA Port
- 2
Notes
- This device's 1GbE LAN ports have a maximum transmission unit (MTU) size of 1,500 bytes.
- The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019.
PCIe
PCIe Expansion
- 1 x Gen3 x2 network upgrade slot
File System
Internal Drives
- Btrfs
- EXT4
External Drives
- Btrfs
- EXT4
- EXT3
- FAT
- NTFS
- HFS+
- exFAT
Appearance
Dimensions (H x W x D)
- 166 x 230 x 223 mm
Weight
- 2.7 kg
Others
System Fan
- 92 mm x 92 mm x 2 pcs
Fan Speed Mode
- Full-Speed Mode
- Cool Mode
- Quiet Mode
Brightness Adjustable Front LED Indicators
- Yes
Power Recovery
- Yes
Noise Level
- 22.90 dB(A)
Scheduled Power On / Off
- Yes
Wake on LAN / WAN
- Yes
Power Supply Unit / Adapter
- 120 W
AC Input Power Voltage
- 100V to 240V AC
Power Frequency
- 50/60 Hz, Single Phase
Power Consumption
- 52.06 W (Access)
- 16.71 W (HDD Hibernation)
British Thermal Unit
- 177.64 BTU/hr (Access)
- 57.02 BTU/hr (HDD Hibernation)
Notes
- Noise testing was conducted with the Synology system fully installed with Synology SATA HDDs and in an idle stae. Two G.R.A.S. Type 40AE microphones are placed at a 1 m distance from the front and rear of the device. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75°C; Humidity: 58.2-61.8%
Temperature
Operating Temperature
- 0°C to 40°C (32°F to 104°F)
Storage Temperature
- -20°C to 60°C (-5°F to 140°F)
Relative Humidity
- 5% to 95% RH
Certifications
Certification
- FCC
- CE
- BSMI
- VCCI
- RCM
- UKCA
- EAC
- CCC
- KC
Environment
- RoHS Compliant
Software Specifications
DSM Specifications
Storage Management
Maximum Single Volume Size
- 108 TB
Maximum Internal Volume Number
- 64
SSD Read / Write Cache (White Paper)
- Yes
SSD TRIM
- Yes
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
Notes
- Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and the amount of system metadata stored.
- Each internal volume (may consist of multiple drives) is expandable up to 108TB.
File Services
File Protocol
- SMB/AFP/NFS/FTP/WebDAV
Maximum Concurrent SMB/AFP/FTP Connections
- 2,000
Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion)
- 2,000
Windows Access Control List (ACL) Integration
- Yes
NFS Kerberos Authentication
- Yes
Notes
- Regarding data concerning tests with RAM expansion, all memory slots are installed with the maximum capacity of supported RAM.
- The testing standard was based on the maximum number of concurrent connections supported by this model. During the testing, 25% of the connections were used to transfer files concurrently. The transfer process guaranteed that the connections were not interrupted; the minimum transfer speed was not guaranteed.
Account & Shared Folder
Maximum Local User Accounts
- 2,048
Maximum Local Groups
- 256
Maximum Shared Folder
- 512
Maximum Shared Folder Sync Tasks
- 32
Hybrid Share
Hybrid Share Folder Number
- 10
High Availability
Synology High Availability
- Yes
Log Centre
Syslog Events per Second
- 800
Virtualizations
VMware vSphere with VAAI
- Yes
Windows Server 2016
- Yes
Windows Server 2019
- Yes
Citrix Ready
- Yes
OpenStack
- Yes
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
- Safari
Supported Language
- English
- German
- French
- Italian
- Spanish
- Danish
- Norwegian
- Swedish
- Dutch
- Russian
- Polish
- Hungarian
- Portuguese (Brazil)
- Portuguese (Europe)
- Turkish
- Czech
- Thai
- Japanese
- Korean
- Chinese (Traditional)
- Chinese (Simplified)
Notes
- For an updated list of supported browser versions, check the DSM Technical Specifications.
Add-on Packages view the complete package list
Antivirus by McAfee (Trial)
- Yes
Central Management System
- Yes
Synology Chat
Maximum Number of Concurrent Users
- 100
Notes
- Measured with simulated users, each with an average record of 20,000 messages, emojis, or stickers. The required server response time is below ten seconds.
- When applicable, systems are tested configured with maximum memory and set to allow the maximum number of connections.
Document Viewer
- Yes
Download Station
Maximum Concurrent Download Tasks
- 80
SAN Manager
Maximum iSCSI Target Number
- 128
Maximum LUN
- 256
LUN Clone/Snapshot, Windows ODX
- Yes
Synology MailPlus / MailPlus Server
Free Email Accounts
- 5 (Licences required for additional accounts)
Maximum Number of Concurrent Users
- 100
Maximum Server Performance
- 1,224,000 emails per day, approx. 37GB
Notes
- Models with more than 4 bays were installed with two SSDs for SSD cache.
- For tested models with expandable memory, the maximum amount of RAM was 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
- Yes
Synology Photos
Facial Recognition
- Yes
Snapshot Replication
Maximum Snapshots per Shared Folder
- 1,024
Maximum of System Snapshots
- 65,536
Surveillance Station
Maximum IP cam (Licences required)
- 40 (including 2 Free Licence)
Total FPS (H.264)
- 1200 FPS @ 720p (1280x720)
- 1050 FPS @ 1080p (1920x1080)
- 600 FPS @ 3M (2048x1536)
- 360 FPS @ 5M (2591x1944)
- 200 FPS @ 4K (3840x2160)
Total FPS (H.265)
- 1200 FPS @ 720p (1280x720)
- 1200 FPS @ 1080p (1920x1080)
- 1000 FPS @ 3M (2048x1536)
- 600 FPS @ 5M (2591x1944)
- 300 FPS @ 4K (3840x2160)
Notes
- Maximum IP cameras and FPS figures are tested with the device fully populated with drives and under a continuous recording setup.
- Actual system capabilities may differ depending on system configuration, drive performance, number of features enabled, and if additional workloads are present.
Synology Drive
Recommended Number of Concurrent Sync Clients
- 350 (the number of connections that can be maintained when the recommended number of hosted files was reached)
Recommended Number of Hosted Files
- 5,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
Notes
- Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
- Utilizing SSD cache can significantly improve performance.
- For tested models with expandable memory, the maximum amount of RAM was installed.
- Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
Synology Office
Maximum Users
- 1,200
Notes
- Multiple files were opened for testing and each file was edited by 30 users simultaneously.
- 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
- Yes
Virtual Machine Manager
Recommended Virtual Machine Instances
- 4
Recommended Virtual DSM Number (Licences required)
- 4 (including 1 Free Licence)
Notes
- The specifications vary depending on system configuration and memory size.
VPN Server
Maximum Connections
- 40
Package
Package Content
- 1 x DS1522+
- 1 x Accessory Pack
- 1 x AC Power Adapter
- 1 x AC Power Cord
- 2 x RJ-45 LAN Cable
- 1 x Quick Installation Guide