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Maintain data availability with an active-passive high availability dual-controller module
Manage, distribute, and protect data, back up endpoints, and guard physical premises
Over 3,500/2,900 MB/s seq. read/write throughput and over 500 TB maximum storage capacity
Keep file sharing services, block storage, backups, and other office applications online with automatic minute-level failover. Defend against operational disruptions with two independent and hot-swappable controllers operating in an active-passive configuration.
The SA3400D is engineered to provide outstanding performance in both NAS and SAN storage roles. Its throughput and random I/O performance support efficient SMB and NFS file serving as well as a range of iSCSI and Fibre Channel block storage applications.
Manage, protect, and share data with versatile business solutions. Empower team collaboration, sandbox applications, and provide VM storage on a unified platform.
Flexibly scale storage capacity, optimize I/O performance, and meet different network needs with a range of expansion options.
Scale server capacity up to 576 TB when your data storage needs increase by adding two 12-bay expansion units.
Add 10/25GbE connectivity with optional add-in cards. Create all-flash storage volumes with SAS SSD for lightening-fast I/O, or boost IOPS and cut down latency on HDD volumes by creating SAS SSD read/write cache volumes.
Engineered to handle intensive workloads, Synology hard drives consistently deliver top-grade performance.
The SA3400D is backed by Synology's 5-year limited warranty, including technical support and hardware replacement services to maximize your return on investment and ensure continuous, high-quality performance.
Performance figures are obtained through internal testing by Synology. Actual performance may vary depending on the testing environment, usage, and configuration. See for more information.
Volumes up to 108 TB are supported with the default installed memory. Volumes up to 200 TB can be created if the memory is upgraded to 32 GB. about maximum volume sizes.
C2 Storage for Hyper Backup and Hybrid Share requires purchase of an annual or monthly . A free trial is available for each newly registered device.
Five MailPlus email accounts are included. Additional email accounts can be added with the purchase of Synology MailPlus License Packs.
Certain advanced features require . One Virtual DSM license is included. Additional Virtual DSM instances require the purchase of .
Please refer to the compatibility list for the latest optional accessories lists.
The SA3400D supports up to 36 drives with two Synology RXD1219sas expansion units, sold separately.
For the most up-to-date list of compatible NICs and HBAs, please check our .
SSD cache volumes store frequently accessed data from conventional HDD volumes to reduce I/O latency and improve system performance. To find out which SAS SSDs are supported, please check our .
The warranty period starts from the date of purchase as stated on your purchase receipt. about our limited product warranty policy.
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Hardware Specifications
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Controller
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Controller
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Number of Controller Module | 2 |
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CPU
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CPU
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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) | ||
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Memory
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Memory
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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 |
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Storage
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Storage
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Drive Bays | 12 |
| Maximum Drive Bays with Expansion Unit | 36 (RXD1219sas x 2) | |
| Compatible Drive Type* |
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| Hot Swappable Drive* | ||
| Notes |
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External Ports
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External Ports
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RJ-45 1GbE LAN Port | 2 (with Link Aggregation / Failover support) (per controller) |
| RJ-45 10GbE LAN Port | 1 (per controller) | |
| Expansion Port | 1 | |
| Notes | This device's 1GbE LAN ports have a maximum transmission unit (MTU) size of 1,500 bytes. | |
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PCIe
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PCIe
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PCIe Expansion | 1 x Gen3 x8 slot (x8 link) (per controller) |
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File System
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File System
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Internal Drives |
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Appearance
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Appearance
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Form Factor (RU) | 2U |
| Size (Height x Width x Depth) | 88 mm x 482 mm x 724 mm | |
| Weight | 19.7 kg | |
| Rack Installation Support* | 4-post 19' rack (Synology Rail Kit - ) | |
| Notes | The rail kit is sold separately | |
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Others
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Others
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System Fan | 60 mm x 60 mm x 2 pcs |
| Fan Speed Mode |
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| Easy Replacement System Fan | ||
| Power Recovery | ||
| Noise Level* | 51.3 dB(A) | |
| Power Supply Unit / Adapter | 500 W | |
| Redundant Power Supply | ||
| AC Input Power Voltage | 100V to 240V AC | |
| Power Frequency | 50/60 Hz, Single Phase | |
| Power Consumption |
257.78 W (Access)
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| British Thermal Unit |
879.58 BTU/hr (Access)
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| Notes |
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Temperature
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Temperature
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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 | |
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Certification
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Certification
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Warranty
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Warranty
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5 Years | |
| Notes | The warranty period starts from the purchase date as stated on your purchase receipt. | |
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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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| Notes | Installing memory modules with differing capacities is not recommended. Check the of your Synology product for recommended memory configurations. |
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DSM Specifications
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| Maximum Single Volume Size* |
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| Maximum Internal Volume Number | 64 |
| SSD Read / Write Cache | |
| SSD TRIM | |
| RAID Group | |
| 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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| File Protocol | SMB/AFP/NFS/FTP/WebDAV |
| Maximum Concurrent SMB/AFP/FTP Connections | 1,200 |
| Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion) | 6,000 |
| Windows Access Control List (ACL) Integration | |
| NFS Kerberos Authentication | |
| Notes |
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| Maximum Local User Accounts | 16,000 |
| Maximum Local Groups | 512 |
| Maximum Shared Folder | 512 |
| Maximum Shared Folder Sync Tasks | 32 |
| Hybrid Share Folder Number | 30 |
| Data & Folder Backup | |
| Entire System Backup | |
| Notes | Full-system backup requires DSM 7.2 or later. |
| 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. |
| Syslog Events per Second | 3,000 |
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Virtualization
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Virtualization
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VMware vSphere with VAAI |
| Windows Server 2022 | |
| Citrix Ready | |
| OpenStack | |
| Networking Protocols | SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, 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 . |
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Add-on Packages
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Antivirus by McAfee (Trial)
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Antivirus by McAfee (Trial)
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| Maximum Number of Concurrent Users | 500 |
| Notes |
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Document Viewer
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Document Viewer
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| Maximum iSCSI Target Number | 256 |
| Maximum LUN | 512 |
| LUN Clone/Snapshot, Windows ODX | |
| Free Email Accounts | 5 |
| Maximum Number of Concurrent Users | 1,100 |
| Maximum Server Performance | 4,312,000 emails per day, approx. 131 GB |
| Notes |
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| Maximum Snapshots per Shared Folder | 1,024 |
| Maximum of System Snapshots | 65,536 |
| Maximum IP cam | 100 (including 2 Free License) |
| Total FPS (H.264) |
3000 FPS @ 720p (1280x720)
2600 FPS @ 1080p (1920x1080) 1080 FPS @ 3M (2048x1536) 700 FPS @ 5M (2591x1944) 500 FPS @ 4K (3840x2160) |
| Total FPS (H.265) |
3000 FPS @ 720p (1280x720)
3000 FPS @ 1080p (1920x1080) 2400 FPS @ 3M (2048x1536) 1300 FPS @ 5M (2591x1944) 800 FPS @ 4K (3840x2160) |
| Notes |
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| 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) |
| Recommended Number of Hosted Files | 50,000,000 (applies to files indexed or hosted by . For file access through other standard protocols, refer to the File Services section above) |
| Notes |
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| Maximum Users | 3,400 |
| Notes |
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| Recommended Virtual Machine Instances | 16 |
| Recommended Virtual DSM Number | 16 (including 1 Free License) |
| Notes | The specifications vary depending on system configuration and memory size. |
| Maximum Connections | 60 |
