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- Number of Controller Modules 2
- CPU Model Intel Xeon D-1541
- CPU Quantity 1 (per controller)
- CPU Cores 8
- System Memory 8 GB DDR4 ECC UDIMM (per controller)
- Pre-installed Memory 8 GB (1 x 8 GB) (per controller)
The Synology SA3400D is a powerful, scalable, and high-availability NAS solution tailored for enterprise IT environments that demand non-stop data access and mission-critical performance. Designed with a dual-active-passive controller architecture, this storage system guarantees automatic failover and ensures that your services stay online even in the event of hardware failure.
Whether you're running virtual machines, managing business-critical databases, or building a reliable backup and disaster recovery solution, the SA3400D provides the performance and resilience your infrastructure needs.
Equipped with two controller modules, the SA3400D ensures continuous system uptime with automatic failover switching in case one controller fails. This architecture is ideal for businesses requiring zero service interruption.
The system supports up to 12 SAS drives by default, and up to 36 drive bays using Synology RXD1219sas expansion units. Store and manage large volumes of data while maintaining speed and efficiency.
Enterprise-Grade Hardware
Intel Xeon D-1541 8-core processor per controller
8GB ECC DDR4 RAM, expandable up to 64GB per controller
Ensures data integrity and smooth multi-tasking in demanding workloads
Flexible Connectivity
Integrated 10GbE and 1GbE RJ-45 ports
Expandable via PCIe Gen3 slots to support 25GbE or Fibre Channel cards
Suitable for virtualization, large-scale backups, and high-speed file sharing
Redundant Power & Cooling
Hot-swappable dual 500W power supplies for uninterrupted operation
Modular fan design enables easy maintenance and cooling efficiency
Smart Expansion & Failover Communication
Mini-SAS HD ports allow seamless expansion
Non-Transparent Bridge (NTB) provides low-latency communication between controllers for instant failover response
OS and Data Isolation
SATA DOM ensures OS is isolated from user data, reducing risk of data corruption and improving overall performance
Centralized Management with DSM
Runs on Synology DiskStation Manager (DSM), offering advanced tools for:
Data protection & backup
Centralized file sharing
Virtual machine hosting
Storage analytics and system monitoring
Enterprise storage environments
Virtualization infrastructure (VMware, Hyper-V)
High-availability iSCSI SAN setups
Backup and disaster recovery solutions
Massive file sharing and centralized storage
| Controller | ||
| Number of Controller Modules | 2 | |
| CPU | ||
| CPU Model | Intel Xeon D-1541 | |
| CPU Quantity | 1 (per controller) | |
| CPU Architecture | 64-bit | |
| CPU Frequency | 2.1 GHz (base) / 2.7 GHz (turbo) | |
| CPU Cores | 8 | |
| Hardware Encryption Engine | – | |
| Memory | ||
| System Memory | 8 GB DDR4 ECC UDIMM (per controller) | |
| Total Memory Slots | 4 (per controller) | |
| Pre-installed Memory | 8 GB (1 x 8 GB) (per controller) | |
| Max Memory Capacity | 64 GB (4 x 16 GB) (per controller) | |
| Storage | ||
| Drive Bays | 12 | |
| Max Drive Bays (with Expansion) | 36 (RXD1219sas × 2) | |
| Compatible Drive Types* | 3.5” dual-port SAS HDD, 2.5” dual-port SAS SSD | |
| Hot-Swappable | Yes | |
| External Ports | ||
| RJ-45 10GbE LAN Port | 1 (per controller) | |
| Expansion Port | 1 (per controller) | |
| Expansion Port Type | Mini-SAS HD | |
| RJ-45 1GbE LAN Ports | 2 (per controller) | |
| PCIe | ||
| PCIe Slot (per controller) | 1 × Gen3 x8 (x8 link) | |
| Appearance | ||
| Weight | 19.7 kg | |
| Form Factor | 2U Rackmount | |
| Dimensions (H × W × D) | 88 × 482 × 724 mm | |
| Rack Support | 4-post 19" rack (RKS-02 rail kit, sold separately) | |
| 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 | ||
| Relative Humidity | FCC, CE, BSMI, VCCI, RCM, EAC, CCC | |
| Warranty | ||
| Relative Humidity | 3-year hardware warranty, extendable to 5 years with EW202 or Extended Warranty Plus | |
| Noise Level (Idle) | 2 years (extendable to 3 with EW202) | |
| Environment | ||
| RoHS Compliant | Yes | |
| Packaging | ||
| - | Main Unit ×1, Accessory Pack, Power Cords ×2, Quick Guide | |
| Accessories | ||
| - | DDR4 ECC UDIMM (8GB/16GB) | |
| Cooling & Power | ||
| System Fans | 2 × 60 mm (hot-swappable) | |
| Fan Modes | Full-Speed / Cool / Quiet | |
| PSU | 500W (redundant) | |
| Power Consumption (Access) | 257.78W (879.58 BTU/hr) | |
| Environmental | ||
| Operating Temperature | 0°C to 35°C (32°F to 95°F) | |
| Noise Level (Idle) | 51.3 dB(A) | |
| Certifications | ||
| Noise Level (Idle) | FCC, CE, BSMI, UKCA, EAC, CCC, KC, RCM, VCCI | |
| Included Accessories | ||
| Noise Level (Idle) | Main Unit ×1, Power Cords ×2, Quick Guide ×1, Accessory Pack ×1 | |
| Optional Accessories | ||
| Noise Level (Idle) | RXD1219sas expansion, HAS5300 HDDs, E25G30-F2/E10G21-F2 NICs, RKS-02 rails | |
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