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Synology 4 Bay NAS Disk Station DS920+ Diskless

Synology 4 Bay NAS Disk Station DS920+ Diskless
Synology 4 Bay NAS Disk Station DS920+ Diskless
Synology 4 Bay NAS Disk Station DS920+ Diskless
Synology 4 Bay NAS Disk Station DS920+ Diskless
Synology 4 Bay NAS Disk Station DS920+ Diskless
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Synology 4 Bay NAS Disk Station DS920+ Diskless
Synology 4 Bay NAS Disk Station DS920+ Diskless
Synology 4 Bay NAS Disk Station DS920+ Diskless
Synology 4 Bay NAS Disk Station DS920+ Diskless
Synology 4 Bay NAS Disk Station DS920+ Diskless
Synology 4 Bay NAS Disk Station DS920+ Diskless
  • Stock: In Stock
  • Model: Synology 4 Bay NAS Disk Station DS920+ Diskless
  • Weight: 2.24kg
  • Dimensions: 223.00mm x 166.00mm x 199.00mm
  • Item Desc: NAS SYNOLOGY 4 BAY DS920+
  • Item Code: 103582
  • Category: Disk Station
Product Views: 204


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  • Two built-in M.2 2280 NVMe SSD slots permit cache acceleration without occupying storage drive bays.
  • Intel quad-core processor with AES-NI hardware encryption engine, over 225 MB/s sequential read and write throughput.
  • 4 GB DDR4 memory (expandable up to 8 GB); Scalable up to 9 drives with Synology DX517
  • Average 15% performance boost to photo indexing and other computing-intensive operations, as well as database response time.
  • By default, two camera licenses are installed; extra licenses can be purchased (CLP1, CLP4, or CLP8)


Hardware Specs CPU
CPU ModelIntel Celeron J4125
CPU Quantity1
CPU Architecture64-bit
CPU Frequency4-core 2.0 (base) / 2.7 (burst) GHz
Hardware Encryption Engine (AES-NI)Yes
System Memory4 GB DDR4 non-ECC
Total Memory Slots1
Maximum Memory Capacity8 GB (4 GB + 4 GB)
NotesPlease 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.
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.
Drive Bays4
Maximum Drive Bays with Expansion Unit9 (DX517 x 1)
M.2 Drive Slots2 (NVMe)
Compatible Drive Type*3.5" SATA HDD
M.2 2280 NVMe SSD
Hot Swappable DriveYes
NotesCompatible 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 Port2 (with Link Aggregation / Failover support)
Max. number of LAN ports2
USB 3.2 Gen 1 Port*2
eSATA Port1
NotesThe USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019.
File System
Internal DrivesBtrfs
External DrivesBtrfs
NotesexFAT 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.
Size (Height x Width x Depth)166 mm x 199 mm x 223 mm
Weight2.24 kg
System Fan92 mm x 92 mm x 2 pcs
Fan Speed ModeFull-Speed Mode
Cool Mode
Quiet Mode
Brightness Adjustable Front LED IndicatorsYes
Power RecoveryYes
Noise Level*19.8 dB(A)
Scheduled Power On / OffYes
Wake on LAN / WANYes
Power Supply Unit / Adapter100 W
AC Input Power Voltage100V to 240V AC
Power Frequency50/60 Hz, Single Phase
Power Consumption*32.17 W (Access)
9.69 W (HDD Hibernation)
British Thermal Unit109.84 BTU/hr (Access)
33.09 BTU/hr (HDD Hibernation)
Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
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 Temperature0°C to 40°C (32°F to 104°F)
Storage Temperature-20°C to 60°C (-5°F to 140°F)
Relative Humidity5% to 95% RH
Warranty3 Years
NotesThe warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
EnvironmentRoHS Compliant
Packaging ContentMain Unit X 1
Accessory Pack X 1
AC Power Adapter X 1
AC Power Cord X 1
RJ-45 LAN Cable X 2
Quick Installation Guide X 1
Optional AccessoriesDDR4 non-ECC SODIMM: D4NESO-2666-4G
Expansion Units: DX517
3.5" SATA HDD: HAT5300
2.5" SATA SSD: SAT5210
M.2 2280 NVMe SSD: SNV3410
VisualStation: VS360HD
Surveillance Device License Pack
Software Specs DSM Specifications
Storage Management
Maximum Single Volume Size*108 TB
Maximum Internal Volume Number64
SSD Read / Write Cache (White Paper)Yes
Supported RAID TypeSynology Hybrid RAID
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
Volume Expansion by Adding a HDDSynology Hybrid RAID
RAID 6 (with Expansion Unit)
Global Hot Spare Supported RAID TypeSynology Hybrid RAID
RAID 6 (with Expansion Unit)
RAID 10 (with Expansion Unit)
NotesEach 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
Maximum Concurrent SMB/AFP/FTP Connections1,000
Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion)2,000
Windows Access Control List (ACL) IntegrationYes
NFS Kerberos AuthenticationYes
NotesRegarding 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 Accounts2,048
Maximum Local Groups256
Maximum Shared Folder512
Maximum Shared Folder Sync Tasks16
Hybrid Share
Hybrid Share Folder Number10
NotesFor more supported details, please check this article.
High Availability
Synology High AvailabilityYes
Log Center
Syslog Events per Second800
VMware vSphere with VAAI
Windows Server 2016Yes
Windows Server 2019Yes
Citrix ReadyYes
General Specifications
Networking ProtocolsSMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported BrowsersGoogle Chrome
Microsoft Edge
Supported LanguageEnglish, 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
NotesFor an updated list of supported browser versions, check the DSM Technical Specifications.
Antivirus by McAfee (Trial)Yes
Central Management SystemYes
Synology Chat
Maximum Users1,500
Maximum Number of Concurrent Users100
NotesWhen applicable, tested systems are configured with maximum memory and set to allow the maximum number of connections.
Document ViewerYes
Download Station
Maximum Concurrent Download Tasks80
SAN Manager
Maximum iSCSI Target Number128
Maximum LUN256
LUN Clone/Snapshot, Windows ODXYes
NotesiSCSI Manager has been renamed to SAN Manager in DSM 7.0.
Synology MailPlus / MailPlus Server
Free Email Accounts5 (Licenses required for additional accounts)
Maximum Number of Concurrent Users100
Maximum Server Performance1,224,000 emails per day, approx. 37GB
NotesModels 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 ComplianceYes
Synology Photos
Facial RecognitionYes
NotesPhoto Station and Synology Moments are succeeded by Synology Photos in DSM 7.0. For a features comparison, check this article.
Snapshot Replication
Maximum Snapshots per Shared Folder1,024
Maximum of System Snapshots65,536
Surveillance Station
Maximum IP cam (Licenses required)40 (including 2 Free License) (see all supported IP cameras)
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)
Total FPS (MJPEG)680 FPS @ 720p (1280x720)
400 FPS @ 1080p (1920x1080)
300 FPS @ 3M (2048x1536)
200 FPS @ 5M (2591x1944)
NotesMaximum 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 Clients350 (the number of connections that can be maintained when the recommended number of hosted files was reached)
Recommended Number of Hosted Files5,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
NotesExceeding 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 Users1,200
NotesMultiple 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 StationYes
Virtual Machine Manager
Recommended Virtual Machine Instances4 (Learn more)
Recommended Virtual DSM Number (Licenses required)4 (including 1 Free License)
NotesThe specifications vary depending on system configuration and memory size.
VPN Server
Maximum Connections40
*Note: The actual colors may be different from the color displayed here. Features, Price and Specifications are subject to change without notice.