Non-disruptive block storage services
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,1 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.

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DSM UC Specifications
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Storage Management
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Maximum Single Volume Size |
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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 (Determining cache size) | ||
| 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 | Volumes over 108 TB require DSM UC 3.1.3-23076 or above and 32 GB of memory or more. | |
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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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VMware ESXi 6.5 and VAAI | |
| Windows Server 2022 | ||
| Citrix Ready | ||
| OpenStack | ||
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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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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 | |
| NAS | |
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| CPU Model | Intel Xeon D-1541 |
| CPU Quantity | 1 (per controller) |
| CPU Core | 8 |
| CPU Architecture | 64-bit |
| CPU Frequency | 2.1 (base) / 2.7 (turbo) GHz |
| Hardware Encryption Engine | Yes |
| Memory | 8 GB DDR4 ECC UDIMM (per controller) |
| Drive Bays | 12 |
| Compatible Drive Type | 2.5” dual-port SAS SSD 3.5” dual-port SAS HDD |
| Hot Swappable Drive | Yes |
| RJ-45 1GbE LAN Port | 2 (with Link Aggregation / Failover support) (per controller) |
| System Fan | 60 mm x 60 mm x 2 (per controller) |
| Power Supply Unit / Adapter | 500W |
| Total Memory Slots | 4 (per controller) |
| Maximum Memory Capacity | 64 GB (16 GB x 4) (per controller) |
| PCIe Expansion | 1 x Gen3 x8 slot (x8 link) (per controller) |
| Redundant Power Supply | Yes |
| RJ-45 10GbE LAN Port | 1 (per controller) |