Synology SA6400 Product Specifications

Hardware Specifications

Processor

Processor Model	AMD EPYC 7272
CPU Quantity	1
CPU Cores	12
Processor Architecture	64-bit
Processor Frequency	2.9 GHz (Base) / 3.2 GHz (Max Turbo)
Hardware Encryption Engine	Yes

Memory

System Memory	32 GB DDR4 ECC RDIMM
Pre-installed Memory Module	32 GB (32 GB x 1)
Total Memory Slots	16
Max. Memory Capacity	1024 GB (64 GB x 16)
Notes	Synology reserves the right to replace memory modules with identical or higher frequency components based on vendor product availability. Compatibility and stability are ensured through rigorous testing. For optimal compatibility and reliability, Synology genuine memory modules are recommended. Using non-Synology memory modules may void product warranty and technical support. For multi-module configurations, all modules must be identical in model and specifications. Refer to the Synology Hardware Installation Guide for configuration recommendations.

Storage

Number of Drive Bays	12
Max. Drive Bays with Expansion Units	108 (RX1223RP x 8)
Drive Types Supported (See Supported Drives)	3.5" SATA HDD 2.5" SATA SSD
Hot-swappable Drives*	Yes
Notes	Synology guarantees the functionality, reliability, and performance of Synology hard drives listed in the compatibility list. Using unverified components may limit certain application functions or lead to data loss and system instability.

External Ports

RJ-45 1GbE LAN Ports	4
RJ-45 10GbE LAN Ports	2
Out-of-Band Management LAN Port	1
Max. LAN Port Count	15
USB 3.2 Gen 1 Ports	2
Expansion Ports	8
Expansion Port Type	Mini-SAS HD

PCIe

PCIe Expansion	2 x Gen3 x8 slots (x8 link)

Appearance

Form Factor (Rack Unit)	2U
Dimensions (H x W x D)	88 mm x 482 mm x 724 mm
Weight	16.5 kg
Rack Mounting Support*	4-post 19" (Synology Rack Mount Kit - RKS-02)
Notes	Rack mount kit sold separately.

Other Items

System Fans	80 mm x 80 mm x 4 pcs
Fan Modes	Full-Speed Mode Low-Temperature Mode Quiet Mode
Replaceable System Fans	Yes
Automatic Power Recovery	Yes
Noise Level*	55.5 dB(A)
Scheduled Power On/Off	Yes
Wake on LAN	Yes
Power Supply Unit/Adapter	550 Watts
Dual Power Supply	Yes
AC Input Voltage	100V to 240V AC
Frequency	50/60 Hz, single phase
Power Consumption*	180.5 W (Access) 88.56 W (HDD Hibernation)
Thermal Unit	615.89 BTU/hr (Access) 302.18 BTU/hr (HDD Hibernation)
Notes	For more information on measuring power consumption, please refer to this article. Noise level test environment: Synology system fully loaded with Synology SATA SSDs, tested at a distance of 1 meter in front of the device with two G.R.A.S. Type 40AE microphones. Background noise level: 16.49-17.51 dB(A); Temperature: 24.25-25.75°C; Humidity: 58.2-61.8%.

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)
Operating Humidity	8% to 80% RH
Storage Humidity	5% to 95% RH

Regulatory Compliance

Certifications	FCC CE BSMI VCCI RCM UKCA EAC CCC KC BIS UL

Warranty

Warranty	5 Years
Notes	Warranty period starts from the purchase date indicated on the receipt. (See more details)

Environmental Safety

Environmental Compliance	Complies with RoHS standard

Package Contents

Host Unit x 1
Accessory Pack x 1
Power Cord x 2
Quick Installation Guide x 1

Optional Accessories

DDR4 ECC RDIMM: D4ER01-32G/D4ER01-64G
Expansion Unit: RX1223RP
Enterprise Series 3.5" SATA HDD: HAT5300 Series
Enterprise Series 2.5" SATA SSD: SAT5200 Series
M.2 SSD & 10GbE Combo Adapter Card: E10M20-T1
M.2 SSD Adapter Card: M2D20
25GbE Network Interface Card: E25G30-F2
10GbE Network Interface Card: E10G30-F2/E10G30-T2/E10G18-T1
Sliding Rail Kit: RKS-02

Notes: For multi-module memory configurations, all modules must be identical in model and specifications. Refer to the Synology Hardware Installation Guide for configuration recommendations.

Software Specifications

DSM Product Specifications

Storage Space Management

Max. Single Storage Pool Capacity	1 PB (Requires at least 64 GB memory, supports RAID 6 groups) 200 TB 108 TB
Max. Storage Pool Count	256
SSD Read/Write Cache (Determine Cache Size)	Yes
SSD TRIM	Yes
RAID Group	Yes
Supported RAID Array Types	RAID F1 Basic JBOD RAID 0 RAID 1 RAID 5 RAID 6 RAID 10
RAID Configuration Migration	Basic to RAID 1 Basic to RAID 5 RAID 1 to RAID 5 RAID 5 to RAID 6
Expand Storage Pool with Larger Drives	RAID F1 RAID 1 RAID 5 RAID 6 RAID 10
Expand Storage Pool with New Drives	RAID F1 JBOD RAID 5 RAID 6
Global Hot Spare Supported RAID Types	RAID F1 RAID 1 RAID 5 RAID 6 RAID 10
Notes	When storage space exceeds 108 TB, 32 GB or more memory is required. The actual maximum storage pool and storage space capacity depend on the hard drive capacity, available drive bays, and RAID type used. The usable capacity of each storage space may be lower than the maximum storage space capacity, depending on the file system and system metadata overhead. Enabling Peta Volume requires validated services and packages. For more information on this limitation, please refer to this article.

File System

Internal Drives	Btrfs ext4
External Drives	Btrfs ext4 ext3 FAT32 NTFS HFS+ exFAT

File Services

File Protocols	SMB AFP NFS FTP WebDAV Rsync
Max. Concurrent SMB Connections based on FSCT	10,000
Windows Access Control List (ACL) Integration	Yes
NFS Kerberos Authentication	Yes
Notes	The connection count for this model was tested with Synology SATA SSDs and up to four 10GbE network ports. Scalability of memory for this model was tested with the maximum supported memory capacity installed. SMB performance was evaluated using Microsoft File Server Capacity Tool (FSCT) version 1.3 with the following configuration: Test workload: HomeFolder scenario provided by FSCT tool. Test duration: 600 seconds. Domain controller and FSCT controller: Windows Server 2022. FSCT clients: 8 x Windows 10 machines. SMB feature: Directory Leasing enabled.

Accounts and Shared Folders

Max. Local User Accounts	15,360
Max. Local Groups	512
Max. Shared Folders	512
Max. Shared Folder Sync Tasks	32

Hybrid Share

Hybrid Share Folder Limit	30

Hyper Backup

Backup Folders and Packages	Yes
System-wide Backup	Yes
Notes	System-wide backup requires DSM 7.2 or higher.

High Availability

Synology High Availability	Yes

Log Center

Max. Log Receiving Rate per Second	3,000

Virtualization Support

VMware ESXi 6.5 and VAAI	Yes
Windows Server 2022	Yes
Citrix Ready	Yes
OpenStack	Yes

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 Languages	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 details on supported browser versions, please refer to DSM technical specifications.

Additional Packages

Central Management System

Yes

Synology Chat

Max. Users	1,500
Notes	Simulated user environment with an average of 20,000 messages, emoticons, or stickers per user. Measured response time is less than ten seconds. Scalability of memory for this model was tested with the maximum supported memory capacity installed.

Download Station

Max. Concurrent Download Tasks	80

SAN Manager

Max. iSCSI Target Count	256
Max. LUN Count	512
LUN Clone/Snapshot, Windows ODX Data Transfer	Yes

Synology MailPlus / MailPlus Server

Free Email Accounts	5 (Additional licenses can be purchased as needed)
Max. Users	14,500
Notes	Recommended maximum user count is based on the following workload: 20% of users perform random file operations (upload, download, move, and delete) with 20,000 mailboxes each, and receive 240 emails daily. 80% of users receive 20 emails daily. Learn more. Testing for models with SSDs was performed using a single SSD storage space. Scalability of memory for this model was tested with the maximum supported memory capacity installed. Learn more about memory requirements. Running in high-availability mode will incur additional overhead. Features enabled during the evaluation period: Anti-spam, Antivirus, DNSBL, Greylisting, Content Scanning, and Full Text Search (English).

Media Server

DLNA Compatibility	Yes

Synology Photos

Facial Recognition	Yes
Object Recognition	Yes

Snapshot Replication

Max. Snapshot Count per Shared Folder	1,024
Max. System Snapshot Count	65,536

Surveillance Station

Default License Count	2 (Licenses can be purchased as needed to expand camera support)
Recommended Max. IP Camera Count and FPS (H.264)	1080p: 160 channels, 2800 FPS 3M: 160 channels, 1600 FPS 5M: 120 channels, 1200 FPS 4K: 80 channels, 800 FPS
Recommended Max. IP Camera Count and FPS (H.265)	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 higher is required to support the listed maximum IP camera count and FPS. Performance data is based on results from continuous recording with a fully loaded device (default memory configuration). Actual system performance may vary depending on system configuration, hard drive performance, enabled features, and other workloads. Use the NVR Selector to quickly find a suitable model for your needs. The number of simultaneous camera streams that can be viewed is twice the recommended maximum camera count. For example, if a model has a recommended maximum camera count of 10 for H.264, 1080p, it can simultaneously view 20 streams of the same specification. Performance metrics can be improved by adding expansion units. For detailed data, please refer to this article.

Synology Drive

Max. Users	24,800
Max. Indexed File Count	100,000,000 (Applies to files indexed by Synology Drive, files accessed via other protocols, refer to File Services section above for file counts)
Notes	Recommended maximum user count is based on the following workload: 20% of users perform random file operations (upload, download, move, and delete) with an average of 20,000 mailboxes, and 80% of users are logged in but idle. Learn more. Testing for models with SSDs was performed using a single SSD storage space. Scalability of memory for this model was tested with the maximum supported memory capacity installed. Exceeding the recommended user count will not cause the package to stop working, but may result in longer response times. The test used the Btrfs file system with unencrypted shared folders.

Synology Office

Max. Users	21,300
Notes	Recommended maximum user count is based on the following workload: 20% of users perform random operations at 30-second intervals, and 80% of users are logged in and viewing files. Learn more. Testing for models with SSDs was performed using a single SSD storage space. Scalability of memory for this model was tested with the maximum supported memory capacity installed. Client performance may affect the maximum number of concurrent editing users. Client test computer specifications: Intel Core i3-3220 / 8GB memory.

Max. Users

21,300

Notes

Recommended maximum user count is based on the following workload: 20% of users perform random operations at 30-second intervals, and 80% of users are logged in and viewing files. Learn more.
Testing for models with SSDs was performed using a single SSD storage space.
Scalability of memory for this model was tested with the maximum supported memory capacity installed.
Client performance may affect the maximum number of concurrent editing users. Client test computer specifications: Intel Core i3-3220 / 8GB memory.

Virtual Machine Manager

Recommended Virtual Machine Count	24 (See more details)
Recommended Virtual DSM Count (License Purchase Required)	24 (Includes 1 free license)
Notes	Specifications may vary based on system configuration and memory.

VPN Server

Max. Connections	32

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