SA3400D

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SA3400D

Keep services online with efficient high-availability storage

Features
Specs

High-availability file and block storage solution

Download Datasheet

Accessible and convenient

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

Versatile applications

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

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.

Minute-level automatic failover Real-time workload protection

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.

Consolidate your data infrastructure

Manage, protect, and share data with versatile business solutions. Empower team collaboration, sandbox applications, and provide VM storage on a unified platform.

Private cloud management

Built-in data protection

Back up PCs, servers, SaaS accounts, and VMs

Create off-site backups for shared folders, LUNs, and more

Business productivity solutions

Boost team productivity with collaborative tools

Sandbox and instantly restore critical services

Supports industry-leading virtualization platforms

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

Up to

576 TB

raw capacity

Up to

25GbE

networking

Up to

218/92K IOPS

read/write with SSD cache

Performance backed by Synology drives

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

Enterprise Series 3.5" SAS

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. Learn more

SA3400D

1Power Button and Indicator
2High Availability Status Indicator
3Alert Indicator
4Mute Button
5Drive Status Indicators

6Drive Trays
7Rail Kit Release Tabs
8Power Ports
9PSU Indicators
10PSU Fans

11PCI Express Expansion Slots
12Console Ports
131GbE RJ-45 Ports
1410GbE RJ-45 Ports
15Expansion Ports

16Reset Buttons
17Remove Indicators
18Alert Indicators
19Status Indicators
20Power Indicators

Notes:

Performance figures are obtained through internal testing by Synology. Actual performance may vary depending on the testing environment, usage, and configuration. See performance charts for more information.
Volumes up to 108 TB are supported with the default installed memory. Volumes up to 200 TB can be created if the memory is upgraded to 32 GB. Learn more about maximum volume sizes.
C2 Storage for Hyper Backup and Hybrid Share requires purchase of an annual or monthly subscription. A free trial is available for each newly registered device.
Five MailPlus email accounts are included. Additional email accounts can be added with the purchase of Synology MailPlus License Packs. Learn more
Certain advanced features require Virtual Machine Manager Pro. One Virtual DSM license is included. Additional Virtual DSM instances require the purchase of Virtual DSM Licenses.
Please refer to the SA3400D compatibility list for the latest optional accessories lists.
The SA3400D supports up to 36 drives with two Synology RXD1219sas expansion units, sold separately.
For the most up-to-date list of compatible NICs and HBAs, please check our compatibility list.
SSD cache volumes store frequently accessed data from conventional HDD volumes to reduce I/O latency and improve system performance. To find out which SAS SSDs are supported, please check our compatibility list.
The warranty period starts from the date of purchase as stated on your purchase receipt. Learn more about our limited product warranty policy.

Hardware Specifications
Controller
Controller	Number of Controller Module	2
CPU
CPU	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
Memory
Memory	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)
	Notes	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.
Storage
Storage	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*
	Notes	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
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
PCIe	PCIe Expansion	1 x Gen3 x8 slot (x8 link) (per controller)
Appearance
Appearance	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
Others
Others	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)
	Notes	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%
Temperature
Temperature	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
Certification
Certification	FCC CE BSMI VCCI UKCA EAC CCC KC RCM
Warranty
Warranty	5 Years
	Notes	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment
Environment	RoHS Compliant
Packaging Content
Packaging Content	Main Unit X 1 Accessory Pack X 1 AC Power Cord X 2 Quick Installation Guide X 1
Optional Accessories
Optional Accessories	DDR4 ECC UDIMM: D4EC-2666-8G/D4EC-2666-16G Expansion Units: RXD1219sas Enterprise Series 3.5" SAS HDD: HAS5300 Series 25GbE Network Interface Card: E25G30-F2 10GbE Network Interface Card: E10G21-F2/E10G30-T2/E10G18-T1 Rail Kit Sliding: RKS-02
	Notes	Installing memory modules with differing capacities is not recommended. Check the Hardware Installation Guide of your Synology product for recommended memory configurations.

DSM Specifications
Storage Management
Storage Management	Maximum Single Volume Size	200 TB (32 GB memory required) 108 TB
	Maximum Internal Volume Number	64
	SSD Read / Write Cache (White Paper)
	SSD TRIM
	RAID Group
	Supported RAID Type	RAID F1 Basic JBOD RAID 0 RAID 1 RAID 5 RAID 6 RAID 10
	RAID Migration	Basic to RAID 1 Basic to RAID 5 RAID 1 to RAID 5
	Volume Expansion with Larger HDDs	RAID F1 RAID 1 RAID 5 RAID 6 RAID 10
	Volume Expansion by Adding a HDD	RAID F1 JBOD RAID 5 RAID 6
	Global Hot Spare Supported RAID Type	RAID F1 RAID 1 RAID 5 RAID 6 RAID 10
	Notes	Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and the amount of system metadata stored. Volumes over 108 TB require 32 GB of memory or more.
File System
File System	Internal Drives	Btrfs ext4
File Services
File Services	File Protocol	SMB AFP NFS FTP WebDAV Rsync
	Maximum Concurrent SMB/AFP/FTP Connections	1,200
	Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion)	6,000
	Windows Access Control List (ACL) Integration
	NFS Kerberos Authentication
	Notes	Regarding data concerning tests with RAM expansion, all memory slots are installed with the maximum capacity of supported RAM. During testing, the maximum number of SSDs supported by this model is installed in a RAID 5 configuration. The testing standard was based on the maximum number of concurrent connections supported by this model. During the testing, 25% of the connections were used to transfer files concurrently. The transfer process guaranteed that the connections were not interrupted; the minimum transfer speed was not guaranteed.
Account & Shared Folder
Account & Shared Folder	Maximum Local User Accounts	16,000
	Maximum Local Groups	512
	Maximum Shared Folder	512
	Maximum Shared Folder Sync Tasks	32
Hybrid Share
Hybrid Share	Maximum Hybrid Share Folders	30
Hyper Backup
Hyper Backup	Folder and Package Backup
	Entire System Backup
	Notes	Full-system backup requires DSM 7.2 or later.
High Availability
High Availability	Synology High Availability
	Notes	Synology High Availability is a built-in package for SA3400D to maximize service uptime. SA3400D does not support forming a high-availability cluster with another server unit.
Log Center
Log Center
	Syslog Events per Second	3,000
Virtualization
Virtualization	VMware ESXi 6.5 and VAAI
	Windows Server 2022
	Citrix Ready
	OpenStack
General Specifications
General Specifications	Supported Protocols	SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
	Supported Browsers	Chrome Firefox Edge Safari
	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
	Notes	For an updated list of supported browser versions, check the DSM Technical Specifications.
Add-on Packages view the complete package list
Antivirus by McAfee (Trial)
Antivirus by McAfee (Trial)
Central Management System
Central Management System
Synology Chat
Synology Chat
	Suggested Concurrent Users	500
	Notes	Measured with simulated users, each with an average record of 20,000 messages, emojis, or stickers. The required server response time is below ten seconds. When applicable, systems are tested configured with maximum memory and set to allow the maximum number of connections.
SAN Manager
SAN Manager
	Maximum iSCSI Target Number	256
	Maximum LUN	512
	LUN Clone/Snapshot, Windows ODX
Synology MailPlus / MailPlus Server
Synology MailPlus / MailPlus Server
	Free Email Accounts	5 (Additional accounts require purchase of licenses)
	Suggested Maximum Users	10,000
	Suggested Concurrent Users	2,000
	Maximum Server Performance	4,312,000 emails per day, approx. 131 GB
	Notes	Models with more than 4 bays were installed with two SSDs for SSD cache. For tested models with expandable memory, the maximum amount of RAM was installed. The performance of the mail system will slightly decrease in high-availability mode due to data synchronization between the two servers. Functions that were enabled in all of the tests above: anti-spam, anti-virus, DNSBL, greylist, content scan, full-text search (English only).
Snapshot Replication
Snapshot Replication
	Maximum Snapshots per Shared Folder	1,024
	Maximum of System Snapshots	65,536
Surveillance Station
Surveillance Station
	Default Licenses	2 (Additional cameras require purchase of licenses)
	Maximum IP Cameras and Total FPS (H.264)	720p: 200 channels, 6000 FPS 1080p: 160 channels, 2800 FPS 3M: 160 channels, 1600 FPS 5M: 120 channels, 1200 FPS 4K: 80 channels, 800 FPS
	Maximum IP Cameras and Total FPS (H.265)	720p: 300 channels, 9000 FPS 1080p: 200 channels, 6000 FPS 3M: 160 channels, 2800 FPS 5M: 160 channels, 1600 FPS 4K: 120 channels, 1200 FPS
	Notes	Surveillance Station 9.1.3 or above is required to support the maximum IP cameras and FPS figures listed. Performance figures are obtained from testing conducted with the device fully populated with drives under a continuous recording setup. Actual system capabilities may vary based on configuration, drive performance, enabled features, and the presence of additional workloads. Use NVR Selector to quickly find a suitable model based on your requirements.
Synology Drive
Synology Drive
	Recommended Number of Concurrent Sync Clients	2,000 (the number of connections that can be maintained when the recommended number of hosted files was reached)
	Recommended Number of Hosted Files	50,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
	Notes	Exceeding the recommended numbers above will not block application operations, but may result in longer response time. Utilizing SSD cache can significantly improve performance. For tested models with expandable memory, the maximum amount of RAM was installed. Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
Synology Office
Synology Office
	Suggested Maximum Users	12,500
	Suggested Concurrent Users	5,000
	Notes	Multiple files were opened for testing and each file was edited by 30 users simultaneously. For tested models with expandable memory, the maximum amount of RAM was installed. Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
Virtual Machine Manager
Virtual Machine Manager
	Recommended Virtual Machine Instances	16 (Learn more)
	Recommended Virtual DSM Number (Licenses required)	16 (including 1 Free License)
	Notes	The specifications vary depending on system configuration and memory size.
VPN Server
VPN Server
	Maximum Connections	60

Notes:

Model specifications are subject to change without prior notice.
The figures are based on Synology internal testing. Each performance test is done individually. No other services or applications are processed at the same time.
The actual performance may be lower than lab testing figure due to differences in server configuration, deployment, and the number of active operations.
If usage requirements exceed the specifications above, please contact our regional partners for professional advice.