Fueling IT transformation for small and midsize businesses
Lightning speed with lower TCO
Featuring an 8-core CPU and 16GB ECC RDIMM memory, FS3400 provides more than 137,000 4K random write IOPS, meeting the needs for real-time analytics, online transaction processing, and mission-critical database services.1 With built-in 10GbE Ethernet, PCIe expansion, and the support of various SAS and SATA drives, FS3400 delivers flexible and economical all-flash server deployment on demand.
CPU - Intel® Xeon® D-1541 8 Core 2.1 GHz
Memory - 16GB DDR4 ECC RDIMM, up to 128GB
Scalability - Up to 72 x SAS/SATA drives2
Expandability - 1 x PCIe 3.0 for 25/40GbE NIC's expansion
Who is using Synology?
Watch how our solutions empower businesses around the world with limitless possibilities.
The storage array has been proven to be more than capable of going toe-to-toe with what would be classed as an enterprise-class all flash array for a fraction of the cost.
Mark Pearce, IT Infrastructure Manager, Mantra Group
By using Synology systems within our hospital networks, we can enjoy secure, fast, and stable solutions for backup, file, and cloud services as well as virtual server environments.
Due to the peculiarities of SSD and RAID technology, a common challenge lies in how to prevent all of the drives from failing at the same time because of the evenly distributed workload. RAID F1 alleviates this problem with a specially designed algorithm to unevenly distribute workload to drives, enhancing the resilience of the storage pool and ensuring your data remains safe.
Compared with traditional RAID, RAID F1 distributes uneven workload to SSDs to prevent all drives from wearing out simultaneously.
Ultimate Backup Solution
FS3400 integrates various backup applications to safeguard your important data on any device with an intuitive user interface and durable storage technologies.
Active Backup for Business
Centralize backup tasks for VMware, Windows, and file servers. Restore whatever you want fast and reliably when needed.
Comprehensively back up your data to a local shared folder, an external device, another Synology NAS, an rsync server, or a public cloud to ensure data safety.
Safeguard your computer with Synology Drive Client. Effortlessly perform real-time data backups and point-in-time file recovery.
Active Backup for
Office 365 / G Suite
On-premise backup solution with a centralized dashboard. Optimize storage efficiency with single instancing and block-level deduplication technology.
Office 365 G Suite
Fully certified storage virtualization solutions
Synology iSCSI storage fully supports most virtualization solutions to enhance work efficiency with easy management interface. VMware vSphere 6 and VAAI integration helps offload storage operations and optimizes computation efficiency. Windows Offloaded Data Transfer (ODX) speeds up data transfer and migration rate. OpenStack Cinder support turns your Synology NAS into a block-based storage component.
As we're committed to improving 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.
Powered by Synology DSM
Synology High Availability
Seamless transition between clustered servers in the event of a server failure to minimize the impact on applications.
Active Backup Suite
Integrated, modern, and license-free backup & instant recovery solution for VMware, Windows, Office 365, and G Suite.
Store multiple backup versions with block-level incremental data backup and cross-version deduplication.
Secure, reliable, and private mail server solution with an intuitive and modern mail client.
Virtual Machine Manager
Run various operating systems in isolated sandboxes. Seamlessly clone, restore and migrate virtual machines.
A versatile solution for file management and synchronization.
Performance figures may vary depending on environment, usage, and configuration.
FS3400 can scale up to 72 drives with 2 x RX2417sas/48 drives with 2 x RX1217sas, sold separately.
Intel Xeon D-1541
8-Core 2.1 (base) / 2.7 (turbo) GHz
Hardware Encryption Engine (AES-NI)
16 GB DDR4 ECC RDIMM
Memory Module Pre-installed
16 GB (16 GB x 1)
Total Memory Slots
Memory Expandable up to
128 GB (32 GB x 4)
Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance.
Please select Synology memory modules for optimum compatibility and reliability. Synology will not provide complete product warranty or technical support if non-Synology memory modules are used for memory expansion.
Maximum Drive Bays with Expansion Unit
48 (RX1217sas) / 72 (RX2417sas)
Compatible Drive Type* (See all supported drives)
2.5" SAS HDD
2.5" SAS SSD
2.5" SATA SSD
Maximum Internal Raw Capacity
184.32 TB (7.68 TB drive x 24) (Capacity may vary by RAID types)
Maximum Raw Capacity with Expansion Units
552.96 TB (184.32 TB + 7.68 TB drive x 48) (Capacity may vary by RAID types)
Maximum Single Volume Size*
200 TB (32 GB RAM required, for RAID 5 or RAID 6 groups only)
Hot Swappable Drive
"Compatible drive type" indicates the drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay.
The maximum raw capacity is not limited by the maximum single volume size. Synology NAS models may utilize capacities over the maximum single volume size as long as each volume created is below the limit. (Learn more)
Each internal volume (may consist of multiple drives) is expandble up to 108TB (with memory less than 32GB) or 200TB (with memory equal to or greater than 32GB).
RJ-45 1GbE LAN Port
4 (with Link Aggregation / Failover support)
RJ-45 10GbE LAN Port
2 (with Link Aggregation / Failover support)
USB 3.0 Port
1 x Gen3 x8 slot (x8 link)
PCIe Network Interface Card (Learn more)
exFAT Access is purchased separately in Package Center.
Form Factor (RU)
Size (Height x Width x Depth)
88 mm x 482 mm x 724 mm
Rack Installation Support*
4-post 19" rack (Synology Rail Kit - RKS1317)
The rail kit is sold separately
80 mm x 80 mm x 4 pcs
Fan Speed Mode
Easy Replacement System Fan
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter
Redundant Power Supply
AC Input Power Voltage
100 V to 240 V AC
50/60 Hz, Single Phase
313.84 W (Access)
125.77 W (HDD Hibernation)
British Thermal Unit
1,070.86 BTU/hr (Access)
429.15 BTU/hr (HDD Hibernation)
Power consumption is measured when it's fully loaded with HGST 1.8TB HUC101818CS4204 hard drive(s).
Noise Level Testing Environment: Fully loaded with Toshiba 600GB AL14SEB060N hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%
0°C to 35°C (32°F to 95°F)
-20°C to 60°C (-5°F to 140°F)
5% to 95% RH
The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Main Unit X 1
Accessory Pack X 1
AC Power Cord X 2
Quick Installation Guide X 1
D4RD-2666-16G DDR4 ECC RDIMM*
D4RD-2666-32G DDR4 ECC RDIMM
Surveillance Device License Pack
Expansion Unit: RX1217sas X 2
Expansion Unit: RX2417sas X 2
Synology Ethernet Adapter E10G17-F2
Synology Ethernet Adapter E10G18-T1
Synology Ethernet Adapter E10G18-T2
Synology Rail Kit Sliding - RKS1317
It is required to use D4RD-2666-16G with identical memory modules of the same capacity and frequency. For more information, visit here.
Model specifications are subject to change without prior notice.
| Stock code || IBSY-RFS3400|
| Brand || Synology|
| Series || FlashStation NAS|
| Model || FS3400|
| Type || 24-Bay 2.5" 2U SAS/SATA, 2x PSU (no RAIL KIT), 16GB, Xeon 8-core, 10GbE|
| ROHS || Y|
| Date added || 30/05/2019|
FS3400 Spec Information
| Platter size || 2.5"|
| RAM/Cache || 16GB|
| Guarantee || 5yr|
| Processor || Xeon D-1541 8-core 2.1GHz|
| CPU Mark (cpubenchmark.net) || 10929|
| Total Drives || 24|
| RAID || 0:1:5:6:|
| Rack size || 2|
FS3400 Spec Connections
|USB3||USB3 type A (host)||External||2|
|PCIe||PCIe v3 x8||External||1|
| Speed/RPM || SAS/SATA to 1GbE and 10GbE|
| Weight (kg) || 27kg|
| Weight (bare) || 14.9kg|
| Watts || 313.84W|
| Colour || Black|
Synology iSCSI SAN UC3200 (32GB ECC) 12-Bay 2U SAS, 2x PSU (32GB Synology ECC RAM Kit) Active-Active (no RAIL KIT) |
Synology RackStation NAS RS4017xs+ (64GB ECC) 16-Bay 3U, 2x PSU (64GB Synology ECC RAM Kit) (no RAIL KIT) |
Synology iSCSI SAN UC3200 (64GB ECC) 12-Bay 2U SAS, 2x PSU (64GB Synology ECC RAM Kit) Active-Active (no RAIL KIT) |
Synology DSM NAS SA3200D (32GB ECC) 12-Bay 2U SAS, 2x PSU (32GB Synology ECC RAM Kit) Active-Passive (no RAIL KIT) |
Synology DSM NAS SA3200D (64GB ECC) 12-Bay 2U SAS, 2x PSU (64GB Synology ECC RAM Kit) Active-Passive (no RAIL KIT) |
Why People Choose Us?
14 Day Return Guarantee
If you change your mind, you can return all or part of your order.
Next Day Delivery
Order before 4pm*, and in-stock products will be with you the next day. (Or Saturday. Or even Same Day).
Wherever you are in the world, we can get your order to you at high speed.
SpanStor Build & Test
Our free service helps you choose the right NAS and Drives, then makes sure it is built & ready to use as soon as you get it.
Professional Live Support
We are here to assist you - before, during and after your purchase, by phone, email or live chat.