Streamline your data management
Synology DS920+ is an ideal network-attached storage solution to streamline data management and productivity. Two built-in M.2 SSD slots and Synology SSD Cache technology allow you to boost system I/O and application performance. Scalable storage design lets you start small and expand storage capacity with Synology DX517 as your data grows.
4-core 2.0 GHz, burst up to 2.7 GHz
2 x built-in M.2 2280 NVMe SSD slots
Average 15% boost to computing-intensive applications
Expand up to 9 drives with a DX517 expansion unit
A more powerful CPU speeds up computing-intensive applications. The new 4-core processor boosts photo indexing, database response times, and web PHP response efficiency. Easily categorize your photo memories, smoothly manage files across computers and mobile devices, and enjoy blazing fast web applications.
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
Virtual Machine Manager enables you to test new software in sandboxes, isolate your customers' machines, and increase the flexibility of your server. You can easily run Windows, Linux, and Virtual DSM on your Synology NAS by just a few steps. Learn more
Perfectly clone and restore a virtual machine within seconds.
Seamlessly migrate Virtual DSM instances from a Synology NAS to another.
Create multiple isolated virtual machines for subsidiary business units or departments.
Store multiple backup versions with block-level incremental data backup and cross-version deduplication.
Schedulable and instantaneous data protection for shared folders and iSCSI LUNs for disaster prevention.
Complete surveillance solution for recording, monitoring, and management.
Run various operating systems in isolated sandboxes. Seamlessly clone, store, and migrate virtual machines.
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Hardware Specifications
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CPU
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CPU
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CPU Model | Intel Celeron J4125 |
| CPU Quantity | 1 | |
| CPU Cores | 4 | |
| CPU Threads | 4 | |
| CPU Architecture | 64-bit | |
| CPU Frequency | 2.0 (base) / 2.7 (turbo) GHz | |
| Hardware Encryption Engine | ||
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Memory
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Memory
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System Memory | 4 GB DDR4 non-ECC |
| Total Memory Slots | 1 | |
| Maximum Memory Capacity | 8 GB (4 GB + 4 GB) | |
| Notes |
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Storage
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Storage
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Drive Bays | 4 |
| Maximum Drive Bays with Expansion Unit | 9 (DX517 x 1) | |
| M.2 Drive Slots | 2 (NVMe) | |
| Drive Type (See all supported drives) |
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| Hot Swappable Drive* | ||
| Notes | The hot swappable drive feature is not supported by M.2 SSD slots. | |
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External Ports
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External Ports
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RJ-45 1GbE LAN Port | 2 |
| USB 3.2 Gen 1 Port | 2 | |
| Expansion Port | 1 | |
| Expansion Port Type | eSATA | |
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Appearance
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Appearance
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Size (Height x Width x Depth) | 166 mm x 199 mm x 223 mm |
| Weight | 2.24 kg | |
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Others
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Others
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System Fan | 92 mm x 92 mm x 2 pcs |
| Fan Speed Mode |
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| Brightness Adjustable Front LED Indicators | ||
| Power Recovery | ||
| Noise Level* | 19.8 dB(A) | |
| Scheduled Power On / Off | ||
| Wake on LAN / WAN | ||
| Power Supply Unit / Adapter | 100 watts | |
| AC Input Power Voltage | 100V to 240V AC | |
| Power Frequency | 50/60 Hz, Single Phase | |
| Power Consumption |
32.17 watts (Access) 9.69 watts (HDD Hibernation) |
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| British Thermal Unit |
109.84 BTU/hr (Access) 33.09 BTU/hr (HDD Hibernation) |
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| Notes |
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Temperature
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Temperature
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Operating Temperature | 0°C to 40°C (32°F to 104°F) |
| Storage Temperature | -20°C to 60°C (-5°F to 140°F) | |
| Operating Humidity | 8% to 80% RH | |
| Storage Humidity | 5% to 95% RH | |
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Certification
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Certification
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Warranty
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Warranty
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2 Years | |
| Notes | The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) | |
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Environment
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Environment
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RoHS Compliant | |
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Packaging Content
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Packaging Content
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Optional Accessories
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Optional Accessories
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| Notes | All memory modules will operate at the maximum frequency specified by the CPU manufacturer. | |
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DSM Specifications
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| Maximum Single Volume Size | 108 TB | |
| Maximum Internal Volume Number | 64 | |
| SSD Read/Write Cache (Determining cache size) | ||
| SSD TRIM | ||
| Supported RAID Type |
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| RAID Migration |
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| Volume Expansion with Larger HDDs |
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| Volume Expansion by Adding a HDD |
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| Global Hot Spare Supported RAID Type |
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| Notes |
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| Internal Drives |
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| External Drives |
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| File Protocol |
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| Maximum Concurrent SMB/AFP/FTP Connections | 1,000 | |
| Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion) | 2,000 | |
| Windows Access Control List (ACL) Integration | ||
| NFS Kerberos Authentication | ||
| Notes |
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| Maximum Local User Accounts | 2,048 | |
| Maximum Local Groups | 256 | |
| Maximum Shared Folder | 512 | |
| Maximum Shared Folder Sync Tasks | 16 | |
| Hybrid Share Folder Number | 10 | |
| Data & Folder Backup | ||
| Entire System Backup | ||
| Notes | Full-system backup requires DSM 7.2 or later. | |
| Synology High Availability | ||
| Syslog Events per Second | 800 | |
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Virtualization
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Virtualization
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VMware vSphere | ESXi 8.0 U2, ESXi 8.0 U1, ESXi 8.0, ESXi 7.0 U3, ESXi 7.0 U2, ESXi 7.0 U1, ESXi 7.0, ESXi 6.7 U3, ESXi 6.7 U2, ESXi 6.7 U1, ESXi 6.7, ESXi 6.5 U3, ESXi 6.5 U2, ESXi 6.5 U1, ESXi 6.5 |
| Microsoft Hyper-V | Windows Server 2022, Windows Server 2019, Windows Server 2016 | |
| Citrix XenServer | XenServer 8, Citrix Hypervisor 8.2 LTSR CU1 | |
| OpenStack | Cinder | |
| Supported Protocols | SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV | |
| Supported Browsers |
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| 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 | |
| Notes | For an updated list of supported browser versions, check the DSM Technical Specifications. | |
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Add-on Packages view the complete package list
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| Maximum Number of Users | 100 | |
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Download Station
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Download Station
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Maximum Concurrent Download Tasks | 80 |
| Maximum iSCSI Target Number | 128 | |
| Maximum LUN | 256 | |
| LUN Clone/Snapshot, Windows ODX | ||
| Free Email Accounts | 5 (Additional accounts require purchase of licenses) | |
| Suggested Maximum Users | 100 | |
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| DLNA Compliance | ||
| Facial Recognition | ||
| Object Recognition | ||
| Maximum Snapshots per Shared Folder | 512 | |
| Maximum Snapshots per LUN | 128 | |
| Maximum Snapshots per System | 65,536 | |
| Maximum Replication Tasks for Shared Folders | 64 | |
| Default Licenses | 2 (Additional cameras require purchase of licenses) | |
| Maximum IP Cameras and Total FPS (H.264) |
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| Maximum IP Cameras and Total FPS (H.265) |
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| Notes |
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| Recommended Number of Concurrent Sync Clients | 350 | |
| Maximum 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) | |
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| Maximum Number of Users | 1,200 | |
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| Recommended Virtual Machine Instances | 4 (Learn more) | |
| Recommended Virtual DSM Number (Licenses required) | 4 (including 1 Free License) | |
| Notes | The specifications vary depending on system configuration and memory size. | |
| Maximum Connections | 40 | |
