Synology Unveils the SA3400D and UC3400: A High-Performance NAS with Dual Controllers

Synology has just released the SA3400D, a new high-performance NAS designed for demanding business environments. The SA3400D offers a dual-controller architecture, ensuring continuous service availability even in the event of hardware failure. This powerful NAS is perfect for organizations that require a reliable and efficient storage solution with minimal downtime.

The SA3400D features an Intel Xeon D-1541 CPU, with each controller housing 8 GB DDR4 ECC UDIMM memory, which can be expanded up to 64 GB per controller. With 12 drive bays, the SA3400D offers extensive storage capacity, supporting various drive types including SAS HDDs, SAS SSDs, SATA HDDs, and SATA SSDs.

The SA3400D also comes with a plethora of connectivity options, such as 2 RJ-45 1GbE LAN ports (with Link Aggregation / Failover support) per controller and a single RJ-45 10GbE LAN port per controller. The NAS can be further expanded with up to 36 drive bays using RXD1219sas expansion units. Additionally, the SA3400D features one PCIe Gen3 x8 slot (x8 link) per controller for adding high-speed network cards or SSD cache.

Comparing the SA3400D to the existing SA3400 and SA3410, the SA3400D offers the advantage of dual-controller architecture, providing higher reliability and ensuring continuous service in the event of hardware failure. The SA3400D has a slightly higher noise level (51.3 dB(A)) compared to the SA3400 (49.8 dB(A)) and the SA3410 (49.8 dB(A)). However, it maintains the same 2U form factor and is compatible with the Synology Rail Kit – RKS-02 for easy rack installation.

Synology offers a 5-year warranty for the SA3400D, ensuring long-term peace of mind for your business-critical data. With its powerful performance, extensive storage capacity, and dual-controller architecture, the SA3400D is an excellent choice for organizations that require a reliable and efficient NAS solution.

For more information on the SA3400D and its complete list of specifications, visit Synology’s official website.

 

What about ports on SA3400D

The Synology SA3400D NAS comes equipped with a variety of ports and connections to ensure seamless operation and efficient management of your data storage. The front panel features a Power Button and Indicator (1), High Availability Status Indicator (2), Alert Indicator (3), Mute Button (4), Drive Status Indicators (5), and Drive Trays (6). For easy installation and removal, the Rail Kit Release Tabs (7) are also present.

On the rear side of the NAS, you’ll find Power Ports (8) for connecting the power supply, PSU Indicators (9), and PSU Fans (10) to keep the system cool. Additionally, there are PCI Express Expansion Slots (11) for adding extra functionality, Console Ports (12) for direct management access, 1GbE RJ-45 Ports (13), and 10GbE RJ-45 Ports (14) for network connectivity.

To facilitate expansion, the NAS includes Expansion Ports (15) for adding more storage units, Reset Buttons (16) to revert settings, Remove Indicators (17), Alert Indicators (18), Status Indicators (19), and Power Indicators (20). These features make the Synology SA3400D NAS a versatile and user-friendly solution for managing your data storage needs.

What about ports on UC3400

The UC3400 Synology Dual Controller Rack is equipped with a comprehensive set of features and indicators for efficient and convenient operation. The power button and indicator provide easy access to power management, while the high availability status indicator allows users to quickly monitor the system’s redundancy status. An alert indicator ensures prompt notification of any critical issues, and a mute button allows for temporary audio silence during alarms. The drive status indicators offer a visual representation of the health and activity of the drives, while the drive trays enable easy hot-swapping and maintenance. The rail kit release tabs facilitate effortless installation and removal of the rack. Power ports are conveniently located for connecting external devices, and PSU indicators monitor the power supply units’ functionality. PSU fans ensure optimal cooling, while PCI Express expansion slots provide flexibility for future upgrades. Console ports allow for direct management and troubleshooting, while 1GbE RJ-45 ports and 10GbE RJ-45 ports offer versatile network connectivity options. Expansion ports provide additional connectivity for expansion units. Reset buttons offer a quick way to restore default settings, and remove indicators assist in locating and replacing faulty components. Alert indicators ensure important system alerts are easily noticed, and status indicators provide an overview of the system’s operational status. Finally, power indicators offer a clear indication of the power supply status. With these features and indicators, the UC3400 Synology Dual Controller Rack provides a user-friendly and reliable solution for data storage and management.

SA3400D performance

SMB 10GbE – Sequential Throughput with SSD (64KB)

Model SA6400 SA3610 SA3410 SA3400D SA3200D
Read 6,446.03 6,272.39 6,309.25 3,540.37 3,540.49
Write 5,074.16 3,482.28 3,396.75 3,280.59 2,405.88

 

SMB 10GbE – Random IOPS with SSD (4KB)

Model SA6400 SA3610 SA3410 SA3400D SA3200D
Read 407,415.96 378,006.93 288,542.13 280,146.19 141,129.19
Write 185,427.75 172,591.88 160,016.86 169,196.76 97,196.62

 

 

What drives are supported on SA3400D

 

 

It is disappointing to discover that the Synology SA3400D model exclusively supports Synology’s own branded HDDs. This lack of compatibility with other enterprise-class hard drives severely limits users’ options when it comes to selecting storage solutions for their systems. By restricting the choice to only Synology HAS5300 series drives, users may face potential supply chain issues, higher costs, or limited availability, ultimately hindering their ability to customize and expand their storage infrastructure based on their unique needs and preferences.

What RAM is supported on SA3400D

It is quite disappointing to learn that the Synology SA3400D model restricts its RAM support to Synology’s own branded modules, eliminating third-party options. This constraint not only reduces the flexibility and choices available for users but could also lead to potential supply shortages or higher costs when procuring additional RAM. Furthermore, the maximum supported capacity of 16GB with the D4EC-2666-16G module may prove to be inadequate for users with growing or demanding workloads, as they would be unable to utilize higher-capacity RAM modules to enhance their system’s performance. Such limitations can hinder businesses and organizations from scaling their infrastructure efficiently to meet their evolving needs.

 

SA3400, SA3400D, SA3410 Comparison

SA3400 SA3400D SA3410
Hardware Specifications
Model SA3400 SA3400D SA3410
CPU
CPU Model Intel Xeon D-1541 Intel Xeon D-1541 Intel Xeon D-1541
CPU Quantity 1 1 (per controller) 1
CPU Architecture 64-bit 64-bit 64-bit
CPU Frequency 8-core 2.1 (base) / 2.7 (turbo) GHz 8-core 2.1 (base) / 2.7 (turbo) GHz 8-core 2.1 (base) / 2.7 (turbo) GHz
Hardware Encryption Engine (AES-NI)
Memory
System Memory 16 GB DDR4 ECC RDIMM 8 GB DDR4 ECC UDIMM (per controller) 16 GB DDR4 ECC RDIMM
Memory Module Pre-installed 16 GB (16 GB x 1) 8 GB (8 GB x 1) (per controller) 16 GB (16 GB x 1)
Total Memory Slots 4 4 (per controller) 4
Maximum Memory Capacity 128 GB (32 GB x 4) 64 GB (16 GB x 4) (per controller) 128 GB (32 GB x 4)
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.
  • 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.
  • 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.
  • Installing memory modules with differing capacities is not recommended. Check the Hardware Installation Guide of your Synology product for recommended memory configurations.
  • 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.
  • Installing memory modules with differing capacities is not recommended. Check the Hardware Installation Guide of your Synology product for recommended memory configurations.
Storage
Drive Bays 12 12 12
Maximum Drive Bays with Expansion Unit 96 (RX1222sas/RX1217sas x 7) / 180 (RX2417sas x 7) 36 (RXD1219sas x 2) 96 (RX1222sas x 7)
Compatible Drive Type* (See all supported drives)
  • 3.5″ SAS HDD
  • 2.5″ SAS HDD
  • 2.5″ SAS SSD
  • 3.5″ SATA HDD
  • 2.5″ SATA HDD
  • 2.5″ SATA SSD
  • 3.5” dual-port SAS HDD
  • 2.5” dual-port SAS SSD
  • 3.5″ SAS HDD
  • 2.5″ SAS SSD
  • 3.5″ 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.
  • It is strongly recommended that you only install drives listed on your device’s compatibility list. Storage pool and volume creation processes may fail when using unverified drives. Synology is unable to provide technical support for devices using unsupported components.
  • “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.
  • It is strongly recommended that you only install drives listed on your device’s compatibility list. Storage pool and volume creation processes may fail when using unverified drives. Synology is unable to provide technical support for devices using unsupported components.
  • “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) 2 (with Link Aggregation / Failover support) (per controller) 4 (with Link Aggregation / Failover support)
RJ-45 10GbE LAN Port 2 (with Link Aggregation / Failover support) 1 (per controller) 2 (with Link Aggregation / Failover support)
Out-of-Band Management LAN Port 1
Max. number of LAN ports 15
USB 3.2 Gen 1 Port* 2 2
Expansion Port 1 1 1
Notes The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019. This device’s 1GbE LAN ports have a maximum transmission unit (MTU) size of 1,500 bytes.
  • 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 2 x Gen3 x8 slots (x8 link) 1 x Gen3 x8 slot (x8 link) (per controller) 2 x Gen3 x8 slots (x8 link)
File System
Internal Drives
  • Btrfs
  • EXT4
  • Btrfs
  • EXT4
  • Btrfs
  • EXT4
External Drives
  • Btrfs
  • EXT4
  • EXT3
  • FAT
  • NTFS
  • HFS+
  • exFAT
  • 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.
Appearance
Form Factor (RU) 2U 2U 2U
Size (Height x Width x Depth) 88 mm x 482 mm x 724 mm 88 mm x 482 mm x 724 mm 88 mm x 482 mm x 724 mm
Weight 14.5 kg 19.7 kg 14.5 kg
Rack Installation Support* 4-post 19″ rack (Synology Rail Kit – RKS-02) 4-post 19″ rack (Synology Rail Kit – RKS-02) 4-post 19″ rack (Synology Rail Kit – RKS-02)
Notes The rail kit is sold separately The rail kit is sold separately The rail kit is sold separately
Others
System Fan 80 mm x 80 mm x 4 pcs 60 mm x 60 mm x 2 pcs 80 mm x 80 mm x 4 pcs
Fan Speed Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
Easy Replacement System Fan
Power Recovery
Noise Level* 49.8 dB(A) 51.3 dB(A) 49.8 dB(A)
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter 500 W 500 W 550 W
Redundant Power Supply
AC Input Power Voltage 100V to 240V AC 100V to 240V AC 100V to 240V AC
Power Frequency 50/60 Hz, Single Phase 50/60 Hz, Single Phase 50/60 Hz, Single Phase
Power Consumption 137.17 W (Access) 70.95 W (HDD Hibernation) 257.78 W (Access) 136.15 W (Access) 58.48 W (HDD Hibernation)
British Thermal Unit 468.04 BTU/hr (Access) 242.09 BTU/hr (HDD Hibernation) 879.58 BTU/hr (Access) 464.56 BTU/hr (Access) 199.54 BTU/hr (HDD Hibernation)
Notes
  • 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%
  • Power consumption is measured when it is fully loaded with Synology 12TB HAS5300-12T hard drive(s).
  • Noise Level Testing Environment: Fully loaded with Synology HAS5300-8T 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%
  • For more information on how power consumption is measured, refer to this article.
  • Noise testing was conducted with the Synology system fully installed with Synology SATA SSDs and in an idle state. Two G.R.A.S. type 40AE microphones were 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 35°C (32°F to 95°F) 0°C to 35°C (32°F to 95°F) 0°C to 35°C (32°F to 95°F)
Storage Temperature -20°C to 60°C (-5°F to 140°F) -20°C to 60°C (-5°F to 140°F) -20°C to 60°C (-5°F to 140°F)
Relative Humidity 5% to 95% RH 5% to 95% RH 5% to 95% RH
Certification
  • FCC
  • CE
  • BSMI
  • EAC
  • CCC
  • KC
  • UL
  • VCCI
  • RCM
  • FCC
  • CE
  • BSMI
  • VCCI
  • UKCA
  • EAC
  • CCC
  • KC
  • RCM
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • UKCA
  • EAC
  • CCC
  • KC
  • UL
Warranty 5 Years 5 Years 5 Years
Notes The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment RoHS Compliant RoHS Compliant RoHS Compliant
Packaging Content
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1
Optional Accessories
  • DDR4 ECC RDIMM: D4RD-2666-16G*/D4RD-2666-32G
  • Expansion Units: RX2417sas/RX1222sas/RX1217sas
  • 3.5″ SAS HDD: HAS5300
  • 3.5″ SATA HDD: HAT5300
  • 2.5″ SATA SSD: SAT5210
  • M.2 SSD & 10GbE Combo Adapter Card: E10M20-T1
  • M.2 SSD Adapter Card: M2D20
  • 25GbE Network Interface Card: E25G21-F2
  • 10GbE Network Interface Card: E10G21-F2/E10G18-T2/E10G18-T1
  • Rail Kit Sliding: RKS-02
  • VisualStation: VS360HD
  • Surveillance Device License Pack
  • DDR4 ECC UDIMM: D4EC-2666-8G/D4EC-2666-16G
  • Expansion Units: RXD1219sas
  • 3.5″ SAS HDD: HAS5300
  • 25GbE Network Interface Card: E25G21-F2
  • 10GbE Network Interface Card: E10G21-F2/E10G18-T2/E10G18-T1
  • Rail Kit Sliding: RKS-02
  • Surveillance Device License Pack
  • DDR4 ECC RDIMM: D4ER01-16G*/D4ER01-32G
  • Expansion Units: RX1222sas
  • 3.5″ SAS HDD: HAS5300
  • 3.5″ SATA HDD: HAT5300
  • 2.5″ SATA SSD: SAT5210
  • M.2 SSD & 10GbE Combo Adapter Card: E10M20-T1
  • M.2 SSD Adapter Card: M2D20
  • 25GbE Network Interface Card: E25G21-F2
  • 10GbE Network Interface Card: E10G21-F2/E10G18-T2/E10G18-T1
  • Rail Kit Sliding: RKS-02
  • VisualStation: VS360HD
  • Surveillance Device License Pack
Notes
  • All memory modules will operate at the maximum frequency specified by the CPU manufacturer.
  • It is required to use D4RD-2666-16G with identical memory modules of the same capacity and frequency. For more information, visit here.
Installing memory modules with differing capacities is not recommended. Check the Hardware Installation Guide of your Synology product for recommended memory configurations. Installing memory modules with differing capacities is not recommended. Check the Hardware Installation Guide of your Synology product for recommended memory configurations.
DSM Specifications
Storage Management
Maximum Single Volume Size*
  • 1 PB (64 GB memory required, for RAID 6 groups only)
  • 200 TB (32 GB memory required)
  • 108 TB
  • 200 TB (32 GB memory required)
  • 108 TB
  • 1 PB (64 GB memory required, for RAID 6 groups only)
  • 200 TB (32 GB memory required)
  • 108 TB
Maximum Internal Volume Number 256 64 256
SSD Read / Write Cache (White Paper)
SSD TRIM
RAID Group
Supported RAID Type
  • RAID F1
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • RAID F1
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • RAID F1
  • 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
  • Basic to RAID 1
  • Basic to RAID 5
  • RAID 1 to RAID 5
  • Basic to RAID 1
  • Basic to RAID 5
  • RAID 1 to RAID 5
  • RAID 5 to RAID 6
Volume Expansion with Larger HDDs
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Volume Expansion by Adding a HDD
  • RAID F1
  • JBOD
  • RAID 5
  • RAID 6
  • RAID F1
  • JBOD
  • RAID 5
  • RAID 6
  • RAID F1
  • JBOD
  • RAID 5
  • RAID 6
Global Hot Spare Supported RAID Type
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • RAID F1
  • 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.
  • On Peta Volume enabled volumes, Snapshot Replication, SSD caching, shared folder encryption, and compression will not be available. Please refer to this article for more information on limitations.
  • Each internal volume (may consist of multiple drives) is expandable up to 108 TB (with memory less than 32 GB) or 200 TB (with memory equal to or greater than 32 GB).
  • 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 108 TB (with memory less than 32 GB) or 200 TB (with memory equal to or greater than 32 GB).
  • 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.
  • On Peta Volume enabled volumes, Snapshot Replication, SSD caching, shared folder encryption, and compression will not be available. Please refer to this article for more information on limitations.
  • Each internal volume (may consist of multiple drives) is expandable up to 108 TB (with memory less than 32 GB) or 200 TB (with memory equal to or greater than 32 GB).
File Services
File Protocol SMB/AFP/NFS/FTP/WebDAV SMB/AFP/NFS/FTP/WebDAV SMB/AFP/NFS/FTP/WebDAV
Maximum Concurrent SMB/AFP/FTP Connections 4,000 1,200 4,000
Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion) 10,000 6,000 10,000
Windows Access Control List (ACL) Integration
NFS Kerberos Authentication
Notes
  • Regarding data concerning tests with RAM expansion, all memory slots are installed with the maximum capacity of supported RAM.
  • During testing, the maximum number of SSDs supported by this model is installed in a RAID 5 configuration.
  • 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.
  • Regarding data concerning tests with RAM expansion, all memory slots are installed with the maximum capacity of supported RAM.
  • During testing, the maximum number of SSDs supported by this model is installed in a RAID 5 configuration.
  • 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.
  • Regarding data concerning tests with RAM expansion, all memory slots are installed with the maximum capacity of supported RAM.
  • During testing, the maximum number of SSDs supported by this model is installed in a RAID 5 configuration.
  • 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 16,000 16,000 16,000
Maximum Local Groups 512 512 512
Maximum Shared Folder 512 512 512
Maximum Shared Folder Sync Tasks 32 32 32
Hybrid Share
Hybrid Share Folder Number 30 30 30
High Availability
Synology High Availability
Notes Synology High Availability is a built-in package for SA3400D to maximize service uptime. SA3400D does not support forming a high-availability cluster with another server unit.
Log Center
Syslog Events per Second 3,000 3,000 3,000
Virtualization
VMware vSphere with VAAI
Windows Server 2016
Windows Server 2019
Citrix Ready
OpenStack
General Specifications
Networking Protocols SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers
  • Google Chrome
  • Firefox
  • Microsoft Edge
  • Safari
  • Google Chrome
  • Firefox
  • Microsoft Edge
  • Safari
  • Google Chrome
  • Firefox
  • Microsoft Edge
  • Safari
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 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 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. For an updated list of supported browser versions, check the DSM Technical Specifications. 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)
Central Management System
Synology Chat
Maximum Users 6,000
Maximum Number of Concurrent Users 500 500 500
Notes When applicable, systems are tested configured with maximum memory and set to allow the maximum number of connections.
  • 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.
  • 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
Download Station
Maximum Concurrent Download Tasks 80 80
SAN Manager
Maximum iSCSI Target Number 256 256 256
Maximum LUN 512 512 512
LUN Clone/Snapshot, Windows ODX
Notes iSCSI Manager has been renamed to SAN Manager in DSM 7.0.
Synology MailPlus / MailPlus Server
Free Email Accounts 5 (Licenses required for additional accounts) 5 (Licenses required for additional accounts) 5 (Licenses required for additional accounts)
Maximum Number of Concurrent Users 1,100 1,100 1,100
Maximum Server Performance 4,471,000 emails per day, approx. 136 GB 4,312,000 emails per day, approx. 131 GB 4,312,000 emails per day, approx. 131 GB
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).
  • 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).
  • 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
Synology Photos
Facial Recognition
Snapshot Replication
Maximum Snapshots per Shared Folder 1,024 1,024 1,024
Maximum of System Snapshots 65,536 65,536 65,536
Surveillance Station
Maximum IP cam (Licenses required) 100 (including 2 Free License) (see all supported IP cameras) 100 (including 2 Free License) (see all supported IP cameras) 128 (including 2 Free License) (see all supported IP cameras)
Total FPS (H.264) 3000 FPS @ 720p (1280×720) 2800 FPS @ 1080p (1920×1080) 1200 FPS @ 3M (2048×1536) 700 FPS @ 5M (2591×1944) 500 FPS @ 4K (3840×2160) 3000 FPS @ 720p (1280×720) 2600 FPS @ 1080p (1920×1080) 1080 FPS @ 3M (2048×1536) 700 FPS @ 5M (2591×1944) 500 FPS @ 4K (3840×2160) 3840 FPS @ 720p (1280×720) 2800 FPS @ 1080p (1920×1080) 1200 FPS @ 3M (2048×1536) 700 FPS @ 5M (2591×1944) 500 FPS @ 4K (3840×2160)
Total FPS (H.265) 3000 FPS @ 720p (1280×720) 3000 FPS @ 1080p (1920×1080) 2400 FPS @ 3M (2048×1536) 1300 FPS @ 5M (2591×1944) 800 FPS @ 4K (3840×2160) 3000 FPS @ 720p (1280×720) 3000 FPS @ 1080p (1920×1080) 2400 FPS @ 3M (2048×1536) 1300 FPS @ 5M (2591×1944) 800 FPS @ 4K (3840×2160) 3840 FPS @ 720p (1280×720) 3840 FPS @ 1080p (1920×1080) 2400 FPS @ 3M (2048×1536) 1300 FPS @ 5M (2591×1944) 800 FPS @ 4K (3840×2160)
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.
  • 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.
  • 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 2,000 (the number of connections that can be maintained when the recommended number of hosted files was reached) 2,000 (the number of connections that can be maintained when the recommended number of hosted files was reached) 2,000 (the number of connections that can be maintained when the recommended number of hosted files was reached)
Recommended Number of Hosted Files 50,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above) 50,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above) 50,000,000 (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.
  • 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.
  • 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 3,400 3,400 3,400
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
  • 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
  • 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
Virtual Machine Manager
Recommended Virtual Machine Instances 16 (Learn more) 16 (Learn more) 16 (Learn more)
Recommended Virtual DSM Number (Licenses required) 16 (including 1 Free License) 16 (including 1 Free License) 16 (including 1 Free License)
Notes The specifications vary depending on system configuration and memory size. The specifications vary depending on system configuration and memory size. The specifications vary depending on system configuration and memory size.
VPN Server
Maximum Connections 60 60 60

UC3400 Active-Active SAN Storage specs

Controller
Number of Controller Module 2
CPU
CPU Model Intel Xeon D-1541
CPU Quantity 1 (per controller)
CPU Architecture 64-bit
CPU Frequency 8-core 2.1 (base) / 2.7 (turbo) GHz
Hardware Encryption Engine (AES-NI)
Memory
System Memory 8 GB DDR4 ECC UDIMM (per controller)
Memory Module Pre-installed 8 GB (8 GB x 1) (per controller)
Total Memory Slots 4 (per controller)
Maximum Memory Capacity 64 GB (16 GB x 4) (per controller)
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 12
Maximum Drive Bays with Expansion Unit 36 (RXD1219sas x 2)
Compatible Drive Type* (See all supported drives)
  • 2.5” dual-port SAS SSD
  • 3.5” dual-port SAS HDD
Maximum Single Volume Size* 108 TB
Hot Swappable Drive*
Notes
  • It is strongly recommended that you only install drives listed on your device’s compatibility list. Storage pool and volume creation processes may fail when using unverified drives. Synology is unable to provide technical support for devices using unsupported components.
  • “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.
  • Each internal volume (may consist of multiple drives) is expandable up to 108TB.
External Ports
RJ-45 1GbE LAN Port 2 (with Link Aggregation / Failover support) (per controller)
RJ-45 10GbE LAN Port 1 (per controller)
PCIe
PCIe Expansion 1 x Gen3 x8 slot (x8 link) (per controller)
File System
Internal Drives Btrfs
Appearance
Size (Height x Width x Depth) 88 mm x 430.5 mm x 692 mm
Size (Height x Width x Depth) (with server ears) 88 mm x 482 mm x 724 mm
Weight 19.7 kg
Rack Installation Support* 4-post 19″ rack (Synology Rail Kit – RKS-02)
Notes The rail kit is sold separately
Others
System Fan 60 mm x 60 mm x 2 (per controller)
Fan Speed Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
Easy Replacement System Fan
Power Recovery
Noise Level* 51.3 dB(A)
Power Supply Unit / Adapter 500W
Redundant Power Supply
AC Input Power Voltage 100 V to 240 V AC
Power Frequency 50/60Hz, Single Phase
Power Consumption 239.25 W (Access)
British Thermal Unit 816.35 BTU/hr (Access)
Notes
  • Noise Level Testing Environment: Fully loaded with Synology HAS5300-8T 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%
  • Power consumption is measured when it is fully loaded with Synology 12TB HAS5300-12T hard drive(s).
Temperature
Operating Temperature 0°C to 35°C (32°F to 95°F)
Storage Temperature -20°C to 60°C (-5°F to 140°F)
Relative Humidity 5% to 95% RH
Certification
  • CE
  • FCC
  • BSMI
  • VCCI
  • RCM
  • UKCA
  • KC
  • EAC
  • CCC
Warranty
5 Years
Notes The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment
RoHS Compliant
Packaging Content
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1
Optional Accessories
  • DDR4 ECC UDIMM: D4EC-2666-8G/D4EC-2666-16G
  • Expansion Units: RXD1219sas
  • 3.5″ SAS HDD: HAS5300
  • 25GbE Network Interface Card: E25G21-F2
  • 10GbE Network Interface Card: E10G21-F2/E10G18-T2/E10G18-T1
  • Rail Kit Sliding: RKS-02
Notes All memory modules will operate at the maximum frequency specified by the CPU manufacturer.

Notes:

  1. Model specifications are subject to change without prior notic
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