Deep Learning NVR DVA3221

Deep Learning NVR DVA3221

Intelligent, Accurate, Private

Actionable insights

Video footage is transformed into actionable insights with advanced deep learning-based analytics, enhancing security without requiring additional personnel.

Actionable insights

Video footage is transformed into actionable insights with advanced deep learning-based analytics, enhancing security without requiring additional personnel.

On-prem recording and analytics

Powered by Synology DSM, footage is kept on the device, with options to flexibly backup or archive to other devices and locations.

Security & privacy

No footage is uploaded to the cloud for storage or analysis. Keep sensitive information secure and locked down.

No recurring fees

One-time hardware and license purchase, with no monthly subscriptions or additional fees for software updates.

Real-time results

Instead of post-event analysis, DVA3221 can notify security operators immediately when incidents occur.

Ease of integration

Compatible with over 7,600 IP cameras, and with ONVIF support, there is no need to replace or be locked into a specific brand of cameras.

Frequently Asked Questions

  • Are specialized cameras required for video analytics? What is the recommended resolution for each camera?

    What notification methods are supported when an event is triggered?

    Can Surveillance Station detect strangers and issue alerts?

    Can the facial recognition feature be used together with door controllers and other devices to implement multi-step security processes?

    How does the system handle lighting changes, shadows, and weather conditions such as rain?

    What external integration / API capabilities are supported?

    Does the DVA support NAS functionality found on other devices running DSM?

Administrator’s guides

Refer to the following administrators’ guides for instructions and suggestions for your deployment.

Contact Us

Not sure which Synology NAS is the best for your surveillance deployment? Contact us for recommendations.

Learn More

Deep Learning NVR DVA3221

product DVA3221 front view photo
product DVA3221 back view photo
  • 1 Drive tray and status indicator
  • 2 Status indicator
  • 3 Alert indicator
  • 4 LAN indicator
  • 5 Drive tray lock
  • 6 Power button and indicator
  • 7 USB 3.2 Gen 1 port
  • 8 System fan
  • 9 Power port
  • 10 Kensington Security Slot
  • 11 Console port
  • 12 Reset button
  • 13 eSATA port
  • 14 1GbE RJ-45 port


  1. DVA3221 includes eight device licenses. Additional device license packs can be purchased to connect more IP cameras, I/O modules, access controllers, or transaction devices.
  2. The maximum number of Face Recognition tasks is six.
  3. Intrusion Detection is limited to six tasks when the feature is enabled for all objects. Learn more
  4. When recording in 4k resolution, the number of deep video analytics tasks is limited to eight. Learn more
CPU Model Intel Atom C3538
CPU Architecture 64-bit
CPU Frequency Quad Core 2.1 GHz
Hardware Encryption Engine (AES-NI)
GPU Model NVIDIA GeForce GTX 1650
System Memory 8 GB DDR4 non-ECC
Memory Module Pre-installed 8 GB (4 GB x 2)
Total Memory Slots 2
Maximum Memory Capacity 32 GB (16 GB x 2)
  • 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.
  • For more information about the recommended memory configurations, please check the Hardware Installation Guide of your Synology product.
  • For more information on memory upgrade limitations, visit here.
Drive Bays 4
Maximum Drive Bays with Expansion Unit 14 (DX517 x 2)
Compatible Drive Type* (See all supported drives)
  • 3.5" SATA HDD
  • 2.5" SATA HDD
  • 2.5" SATA SSD
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.
External Ports
External Ports
RJ-45 1GbE LAN Port 4 (with Link Aggregation / Failover support)
USB 3.0 Port 3
eSATA Port 2
Size (Height x Width x Depth) 166 mm x 250 mm x 237 mm
Weight 4.92 kg
Wake on LAN / WAN
System Fan 120 mm x 120 mm x 1 pcs
Fan Speed Mode
  • Cool Mode
  • Quiet Mode
  • Full-Speed Mode
Power Recovery
Noise Level* 28.3 dB(A)
Scheduled Power On / Off
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* 43.92 W (Access)
28.43 W (HDD Hibernation)
British Thermal Unit 149.86 BTU/hr (Access)
97.01 BTU/hr (HDD Hibernation)
  • For more information on how power consumption is measured, refer to this article.
  • 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%
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
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • EAC
  • KC
3-year hardware warranty, extendable to 5 years with EW202 or Extended Warranty Plus
  • Availability varies by region. Before purchasing, please visit the official web pages of EW201/202 and Extended Warranty Plus for a list of eligible regions.
  • The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
RoHS Compliant
Packaging Content
Packaging Content
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 1
  • RJ-45 LAN Cable X 2
  • Quick Installation Guide X 1
Optional Accessories
Optional Accessories
Notes The original non-ECC memory modules must be removed before the optional ECC memory modules can be installed. For more information, visit here.
Surveillance Station
Video Analysis
Video Analysis
Deep Video Analytics Features
  • People and vehicle detection (with license plate recognition)
  • People counting
  • Vehicle counting
  • Intrusion detection
  • Face recognition
Deep Video Analytics Tasks
  • People and vehicle detection (without license plate recognition): up to 12 tasks
  • People and vehicle detection (with license plate recognition): up to 6 tasks
  • People counting: up to 12 tasks
  • Vehicle counting: up to 12 tasks
  • Intrusion detection (detecting specific objects): up to 12 tasks
  • Intrusion detection (detecting all objects): up to 6 tasks
  • Face recognition: up to 6 tasks
Maximum Number of Registrations Supported by Face Database 10,000
Notes When recording in 4k resolution, the number of deep video analytics tasks is limited to 8. Learn more
General Specifications
General Specifications
Maximum IP cam (Licenses required) 32 (including 8 free licenses) (see all supported IP cameras)
Total FPS (H.264) 960 FPS @ 720p (1280x720), 32 Channels
448 FPS @ 1080p (1920x1080), 32 Channels
280 FPS @ 3M (2048x1536), 28 Channels
190 FPS @ 5M (2591x1944), 19 Channels
130 FPS @ 4K (3840x2160), 13 Channels
Total FPS (H.265) 960 FPS @ 720p (1280x720), 32 Channels
960 FPS @ 1080p (1920x1080), 32 Channels
320 FPS @ 3M (2048x1536), 32 Channels
200 FPS @ 5M (2591x1944), 20 Channels
150 FPS @ 4K (3840x2160), 15 Channels
Video Codecs
  • H.264
  • H.264+
  • H.265
  • H.265+
  • MPEG-4
  • MxPEG (not supported by Deep Video Analytics tasks)
Audio Codecs
  • AMR
  • G711
  • G726
  • PCM
  • Actual system capabilities may differ depending on system configuration, drive performance, number of features enabled, and if additional workloads are present.
  • Maximum IP cameras and FPS figures are tested with the device fully populated with drives and under a continuous recording setup.
System Services
File System
File System
Internal Drives
  • Btrfs
  • EXT4
External Drives
  • Btrfs
  • EXT4
  • EXT3
  • FAT
  • NTFS
  • HFS+
  • exFAT
Notes exFAT Access can be installed for free from Package Center in DSM 7.0. In DSM 6.2 or earlier versions, exFAT Access needs to be purchased in Package Center.
Storage Management
Storage Management
Maximum Single Volume Size* 108 TB
Maximum Internal Volume Number 64
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 10
  • RAID 1
  • RAID 5
  • RAID 6
Volume Expansion by Adding a HDD
  • Synology Hybrid RAID
  • JBOD
  • RAID 5
  • RAID 6 (with Expansion Unit)
Global Hot Spare Supported RAID Type
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • Each internal volume (may consist of multiple drives) is expandable up to 108TB.
  • 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.
File Services
File Services
File Protocol SMB/AFP/NFS/FTP/WebDAV
Account & Shared Folder
Account & Shared Folder
Maximum Local User Accounts 2,048
Maximum Local Groups 256
Maximum Shared Folder 512
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
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
VPN Server
VPN Server
Maximum Connections 40


  1. Model specifications are subject to change without prior notice.
  2. 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.
  3. The actual performance may be lower than lab testing figure due to differences in server configuration, deployment, and the number of active operations.
  4. If usage requirements exceed the specifications above, please contact our regional partners for professional advice.