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Synology DS916+ 2GB DiskStation 4-Bay NAS

Model: SY20022 / Item No: 474197

Synology DS916+ 2GB DiskStation 4-Bay NAS

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A NAS built for professionals’ growing needs, ready to deliver high productivity with flexible scalability

Meet the ambitious DS916+ designed to satisfy professional NAS users’ needs. With a powerful quad-core CPU, AES-NI hardware encryption engine, scalability up to nine drives, and 2GB or 8GB memory options, DS916+ brings better support for multitasking, and increases business dynamics.


Hardware Specifications
CPU Model Intel Pentium N3710
CPU Architecture 64-bit
CPU Frequency Quad Core 1.6 burst up to 2.56 GHz
Hardware Encryption Engine (AES-NI)  Y
Hardware Transcoding Engine H.264 (AVC), H.265 (HEVC), MPEG-2 and VC-1; maximum resolution: 4K (4096 x 2160); maximum frame rate per second (FPS): 30
System Memory 2 / 8 GB DDR3
Drive Bay(s) 4
Maximum Drive Bays with Expansion Unit 9
Compatible Drive Type* (See all supported drives)
Maximum Internal Raw Capacity 40 TB (10 TB HDD x 4) (Capacity may vary by RAID types)
Maximum Raw Capacity with Expansion Units 90 TB (10 TB HDD x 9) (Capacity may vary by RAID types)
Maximum Single Volume Size 108 TB
Hot Swappable Drive  Y
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.
External Ports
USB 3.0 Port 3
eSATA Port 1
File System
Internal Drives
  • Btrfs
  • EXT4
External Drives
  • Btrfs
  • EXT4
  • EXT3
  • FAT
  • NTFS
  • HFS+
  • exFAT*
Size (Height x Width x Depth) 165 mm x 203 mm x 233.2 mm 
Weight 2.04 kg 
RJ-45 1GbE LAN Port 2 (with Link Aggregation / Failover support)
Wake on LAN/WAN  
System Fan 92 mm x 92 mm x 2 pcs
Fan Speed Mode
  • Cool Mode
  • Quiet Mode
Wireless Support (dongle)  Y
Brightness adjustable front LED indicators  Y
Power Recovery  Y
Noise Level* 19.4 dB(A) 
Scheduled Power On/Off  
Power Supply Unit / Adapter 100W 
AC Input Power Voltage 100V to 240V AC
Power Frequency 50/60 Hz, Single Phase
Power Consumption* 30 W (Access) 
13 W (HDD Hibernation) 
British Thermal Unit 102.4 BTU/hr (Access) 
44.4 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
  • FCC Class B
  • CE Class B
  • BSMI Class B
Warranty 3 Years
  • 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 512
Maximum iSCSI Target Number 32
Maximum iSCSI LUN 256
iSCSI LUN Clone/Snapshot, Windows ODX  Y
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
Volume Expansion by Adding a HDD
  • Synology Hybrid RAID
  • RAID 5
  • RAID 6
  • JBOD
Global Hot Spare Supported RAID Type
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
SSD Support
SSD Read/Write Cache(White Paper)  Y
File Sharing Capacity
Maximum User Accounts 2048
Maximum Groups 256
Maximum Shared Folder 512
Maximum Shared Folder Sync Tasks 8
Maximum Concurrent CIFS/AFP/FTP Connections 512 (2GB RAM) / 2048 (8GB RAM)
Windows Access Control List (ACL) Integration  Y
NFS Kerberos Authentication  Y
High Availability Manager  Y
Log Center  Y
Syslog Events per Second 800
VMware vSphere 5 with VAAI  Y
VMware vSphere 6 with VAAI  Y
Windows Server 2012  Y
Windows Server 2012 R2  Y
Citrix Ready  Y
Add-on Packages (learn more about the complete add-on package list)
Antivirus by McAfee (Trial)  Y
Central Management System  Y
Cloud Station Server  Y
Maximum Concurrent File Transfers 512 (2GB RAM) / 2000 (8GB RAM)
Docker DSM  Y
Maximum Docker DSM Number (Licenses required) 2 (2GB RAM) / 10 (8GB RAM) (including 1 Free License) (Learn more)
Document Viewer  Y
Download Station  Y
Maximum Concurrent Download Tasks 80
exFAT Access (optional)  Y
HiDrive Backup  Y
MailPlus / MailPlus Server  Y
Free Email Accounts 5 (Licenses required for additional accounts)
Recommended MailPlus Client Number Up to 100 (8GB RAM) / 50 (2GB RAM)
Maximum Server Performance 87,300 (8GB RAM) / 50,400 (2GB RAM) emails per day, approx. 2.7 GB (8GB RAM) / 1.5GB (2GB RAM)
  • 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 Certification  Y
Snapshot Replication  Y
Maximum Snapshots per Shared Folder 1024
Maximum Snapshots of all Shared Folder 65536
SpreadSheet  Y
Maximum Simultaneous Editing Users 125
Surveillance Station  Y
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) 
800 (2GB RAM) / 1000 (8GB RAM) FPS @ 1080p (1920×1080) 
300 (2GB RAM) / 400 (8GB RAM) FPS @ 3M (2048x1536) 
250 (2GB RAM) / 250 (8GB RAM) FPS @ 5M (2591x1944)
Total FPS (MJPEG)* 500 (2GB RAM) / 800 (8GB RAM) FPS @ 720p (1280x720) 
150 (2GB RAM) / 300 (8GB RAM) FPS @ 1080p (1920×1080) 
100 (2GB RAM) / 160 (8GB RAM) FPS @ 3M (2048x1536) 
72 (2GB RAM) / 120 (8GB RAM) 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.
Video Station  Y
Video Transcoding 4K Group 1 (See more)
Maximum Transcoding Channel Number 1 channel, 30 FPS @ 4K (4096 x 2160), H.264 (AVC)/H.265 (HEVC) or 3 channel, 30 FPS @ 1080p (1920×1080), H.264 (AVC)/H.265 (HEVC)/MPEG-2/VC-1
VPN Server  Y
Maximum Connections 20
Environment & Packaging
Environment RoHS Compliant
Packaging Content
  • Main Unit X 1
  • Welcome Note X 1
  • Accessory Pack X 1
  • AC Power Adapter X 1
  • AC Power Cord X 1
  • RJ-45 LAN Cable X 2
Optional Accessories
  • Camera License Pack
  • Expansion Unit: DX213 X 1
  • Expansion Unit: DX513 X 1
  • VS360HD


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