Synology SA3400D


SA Series RackStation SA3400D

Keep services online with efficient high-availability storage

CPU: Intel Xeon D-1541 8-core 2.1 (base) / 2.7 (turbo) GHz


RJ-45 10GbE LAN Port x1

RJ-45 Gigabit LAN Port x2

Expansion Port x1

PCIe Gen3 x8 slot x1

Redundant Power Supply

5 Years Warranty

----- Reference -----

Synology SA3400D 12 Bays NAS, Keep services online with efficient high-availability storage, CPU: Intel Xeon D-1541 8-core 2.1 (base) / 2.7 (turbo) GHz, RAM: 8 GB DDR4 ECC UDIMM (Max 64GB), RJ-45 10GbE LAN Port x1, RJ-45 Gigabit LAN Port x2, Expansion Port x8, PCIe Gen3 x8 slot x1, Redundant Power Supply, 5 Years Warranty

Drive Bays : 12-Bays NAS
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Synology SA3400D

Keep services online with efficient high-availability storage

Accessible and convenient

Accessible and convenient

Maintain data availability with an active-passive high availability dual-controller module

Versatile applications

Versatile applications

Manage, distribute, and protect data, back up endpoints, and guard physical premises

Fast and efficient

Fast and efficient

Over 3,500/2,900 MB/s seq. read/write throughput1 and over 500 TB maximum storage capacity2

Built-in High Availability

Keep file sharing services, block storage, backups, and other office applications online with automatic minute-level failover. Defend against operational disruptions with two independent and hot-swappable controllers operating in an active-passive configuration.

Made for demanding environments

The SA3400D is engineered to provide outstanding performance in both NAS and SAN storage roles. Its throughput and random I/O performance support efficient SMB and NFS file serving as well as a range of iSCSI and Fibre Channel block storage applications.

Flexible options to meet changing needs

Flexibly scale storage capacity, optimize I/O performance, and meet different network needs with a range of expansion options.6

Add storage capacity on demand

Scale server capacity up to 576 TB7 when your data storage needs increase by adding two 12-bay RXD1219sas expansion units.

Boost network and I/O performance

Add 10/25GbE connectivity with optional add-in cards.8 Create all-flash storage volumes with SAS SSD for lightening-fast I/O, or boost IOPS and cut down latency on HDD volumes by creating SAS SSD read/write cache volumes.9

Performance backed by Synology drives

Engineered to handle intensive workloads, Synology hard drives consistently deliver top-grade performance.

Synology has you covered

The SA3400D is backed by Synology's 5-year limited warranty,10 including technical support and hardware replacement services to maximize your return on investment and ensure continuous, high-quality performance. 


productSA3400Dfront view photo
productSA3400Dback view photo

Power Button and Indicator

High Availability Status Indicator

Alert Indicator

Mute Button

Drive Status Indicators

Drive Trays

Rail Kit Release Tabs

Power Ports

PSU Indicators

10  PSU Fans

11  PCI Express Expansion Slots

12  Console Ports

13  1GbE RJ-45 Ports

14  10GbE RJ-45 Ports

15  Expansion Ports

16  Reset Buttons

17  Remove Indicators

18  Alert Indicators

19  Status Indicators

20  Power Indicators

Hardware Specifications

Number of Controller Module 2
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
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)
  • 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.
  • Installing memory modules with differing capacities is not recommended. Check the Hardware Installation Guide of your Synology product for recommended memory configurations.
Drive Bays 12
Maximum Drive Bays with Expansion Unit 36 (RXD1219sas x 2)
Compatible Drive Type* (See all supported drives)
  • 3.5” dual-port SAS HDD
  • 2.5” dual-port SAS SSD
Hot Swappable Drive*
  • Synology only guarantees full functionality, reliability, and performance for Synology drives listed on the compatibility list. The use of non-validated components may limit certain functionality and result in data loss and system instability.
  • "Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay.
External Ports
RJ-45 1GbE LAN Port 2 (with Link Aggregation / Failover support) (per controller)
RJ-45 10GbE LAN Port 1 (per controller)
Expansion Port 1
Notes This device's 1GbE LAN ports have a maximum transmission unit (MTU) size of 1,500 bytes.
PCIe Expansion 1 x Gen3 x8 slot (x8 link) (per controller)
Form Factor (RU) 2U
Size (Height x Width x Depth) 88 mm x 482 mm x 724 mm
Weight 19.7 kg
Rack Installation Support* 4-post 19" rack (Synology Rail Kit - RKS-02)
Notes The rail kit is sold separately
System Fan 60 mm x 60 mm x 2 pcs
Fan Speed Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
Easy Replacement System Fan
Power Recovery
Noise Level* 51.3 dB(A)
Power Supply Unit / Adapter 500 W
Redundant Power Supply
AC Input Power Voltage 100V to 240V AC
Power Frequency 50/60 Hz, Single Phase
Power Consumption 257.78 W (Access)
British Thermal Unit 879.58 BTU/hr (Access)
  • Power consumption is measured when it is fully loaded with Synology 12TB HAS5300-12T hard drive(s).
  • Noise Level Testing Environment: Fully loaded with Synology HAS5300-8T 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%
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
  • FCC
  • CE
  • BSMI
  • VCCI
  • UKCA
  • EAC
  • CCC
  • KC
  • RCM
5 Years
Notes The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
RoHS Compliant
Packaging Content
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1
Optional Accessories
Notes Installing memory modules with differing capacities is not recommended. Check the Hardware Installation Guide of your Synology product for recommended memory configurations.                           
: SA3400D
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Hurry! only 2 items left in stock.