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Ensure interruption-free iSCSI and FC services
Over 180,000 4K Random Write IOPS, and up to 576 TB of storage
Full support for mainstream virtualization systems
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.
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.
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
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.
Maximize service uptime for critical services and enhance data security with snapshot protection and self-encrypting drive support in UC3400.
Simple capacity expansion of up to 576 TB of raw storage is available with two Synology RXD1219sas Expansion Units.
Leverage high sustained performance and reliability with enterprise-grade drives with built-in protection designed for Synology systems.
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.
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.
For the most up-to-date list of compatible NICs, please check our
UC3400 supports up to 36 drives with the addition of two Synology expansion unit, sold separately.
Check the compatibility list for supported drives.
The warranty period starts from the date of purchase as stated on your purchase receipt. Visit .
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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) | |
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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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| Maximum Single Volume Size* | 108 TB | |
| Hot Swappable Drive* | ||
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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) | |
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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 | Btrfs |
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Appearance
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Appearance
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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 - ) | |
| 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 (per controller) |
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| 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)
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| British Thermal Unit |
816.35 BTU/hr (Access)
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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 | All memory modules will operate at the maximum frequency specified by the CPU manufacturer. |
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DSM UC Specifications
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Storage Management
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Storage Management
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Maximum Internal Volume Number | 32 |
| Maximum iSCSI Target Number | 128 | |
| Maximum LUN | 128 | |
| Advanced LUN (Clone/Snapshot) Support | ||
| Maximum Number of Snapshots per Advanced LUN | 256 | |
| 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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Account & Shared Folder
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Account & Shared Folder
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Maximum Local User Accounts | 65 |
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Virtualization
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Virtualization
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VMware vSphere with VAAI | |
| Windows Server 2022 | ||
| Citrix Ready | ||
| OpenStack | ||
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Snapshot Replication
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Snapshot Replication
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Maximum Number of Replication | 64 |
| Maximum of System Snapshots | 4,096 | |
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General Specifications
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General Specifications
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Networking Protocols |
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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 |
