Synology Unified Controller UC3400
Active-active SAN for mission-critical environments
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Overview:
Active-Active SAN Storage for Mission-Critical Services
Synology UC3400 is designed for highavailability SAN environments, featuring an active-active architecture that ensures uninterrupted block storage services, while providing resilient data protection and a simplified management interface.
Non-disruptive block storage services

Dual Controller Module
Ensure interruption-free iSCSI and FC services

High Performance
Over 180,000 4K Random Write IOPS, and up to 576 TB of storage

Virtualization-ready
Full support for mainstream virtualization systems
Reliability and High Availability
Active-active dual controllers work simultaneously to ensure zero downtime in the event of a controller failure while the non-transparent bridge (NTB) enables inter-domain communication to maximize the protection of in-flight data.

Features:
Active-Active SAN with enterprise-class performance
Designed for mission-critical environments, UC3400 is a high-availability SAN solution supporting Fibre Channel (FC) and iSCSI protocols. With over 180,000 4K random write IOPS, it supports a wide range of demanding workloads.





Virtualization-ready
Full certification for VMware, vSphere, Microsoft Hyper-V, Citrix XenServer, and OpenStack environments Support for Windows Offloaded Data Transfer (ODX), VMware vSphere Storage APIs Array Integration (VAAI), and ALUA ensure optimized and efficient storage operations OpenStack® Cinder support enables UC3400 to become a block-based storage component
Flexible network options
Boost network from 10GbE and dual 1GbE RJ-45 ports to 10/25 Gb Ethernet cards or 16 Gb Fibre channel host bus adapters on each controller

Built-in data protection and security
Maximize service uptime for critical services and enhance data security with snapshot protection and self-encrypting drive support in UC3400.



Storage expansion
Simple capacity expansion of up to 576 TB of raw storage is available with two Synology RXD1219sas Expansion Units
Specifications:
Unified Controller UC3400 Hardware Specifications: | |
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Hardware Specifications | |
Number of Controller Module | 2 |
CPU Model | Intel Xeon D-1541 |
CPU Core | 8 |
CPU Architecture | 64-bit |
CPU Frequency | 3.35 (base) / 3.6 (turbo) GHz |
Hardware encryption engine | |
Memory | 8 GB DDR4 ECC UDIMM (per controller) |
Memory Module Pre-instaled | 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) |
Drive Bays | 12 |
Maximum Drive Bays with Expansion Unit | 36 (RXD1219sas x 2) |
Compatible drive type |
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Hot swappable drive | |
External port |
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PCIe Expansion | 1 x Gen3 x8 slot (x8 link) (per controller) |
Add-In-Card Support |
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Internal Drives | Btrfs |
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) |
Rack Installation Support | The rail kit is sold separately |
Fan Speed Mode |
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System fan | 60 mm x 60 mm x 2 (per controller) |
Easy Replacement System Fan | |
Power Recovery | |
Noise Level | 51.3 dB(A) |
Power Recovery | |
Wake on LAN/WAN | |
Power Supply Unit/Adapter | 550 watts |
Redundant Power Supply | |
AC input power voltage | 100 V to 240 V AC |
Power Frequency | 50 to 60Hz, single phase |
Power Consumption | 239.25 W (Access) |
British Thermal Unit | 816.35 BTU/hr (Access) |
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 |
Certifications and Packaging | |
Environment safety | RoHS compliant |
Package content |
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Optional accessories |
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Warranty | 3-year hardware warranty, extendable to 5 years with EW202 or Extended Warranty Plus |
Documentation:
Download the Synology Unified Controller UC3400 Datasheet (PDF).

5-year warranty
At Synology, we are committed to product innovation and quality. Synology guarantees a robust and reliable data management experience with a 5-year limited warranty, providing responsive technical support and hardware replacement services to maximize your return on investment.
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- Pricing and product availability subject to change without notice.
Our Price: Request a Quote