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Bee Series by Synology
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Comparison results

FS6400 SA6400
FS6400 SA6400
Hardware Specs
Hardware Specifications
CPU
CPU Model Intel Xeon Silver 4110 AMD EPYC 7272
CPU Quantity 2 1
CPU Core 8 12
CPU Architecture 64-bit 64-bit
CPU Frequency 2.1 (base) / 3.0 (turbo) GHz 2.9 (base) / 3.2 (turbo) GHz
Hardware Encryption Engine
Memory
System Memory 32 GB DDR4 ECC RDIMM 32 GB DDR4 ECC RDIMM
Memory Module Pre-installed 32 GB (16 GB x 2) 32 GB (32 GB x 1)
Total Memory Slots 16 16
Maximum Memory Capacity 512 GB (32 GB x 16) 1024 GB (64 GB x 16)
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.
  • For more information on the recommended memory configurations, visit here.
  • 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.
  • For multi-module memory configurations, all modules must be identical and share the same model number. Check the Product Manual of your Synology product for recommended memory configurations.
Storage
Drive Bays 24 12
Maximum Drive Bays with Expansion Unit 72 (FX2421 x 2) 108 (RX1223RP x 8)
Drive Type (See all supported drives)
  • 2.5" SAS HDD
  • 2.5" SAS SSD
  • 2.5" SATA SSD
  • 3.5" SATA HDD
  • 2.5" SATA 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.
External Ports
RJ-45 1GbE LAN Port 2 4
RJ-45 10GbE LAN Port 2 2
Out-of-Band Management LAN Port 1
Max. Number of LAN Ports 15
USB 3.2 Gen 1 Port 2 2
Expansion Port 1 8
Expansion Port Type Mini-SAS HD Mini-SAS HD
PCIe
PCIe Expansion 2 x Gen3 x8 slots (x8 link) 2 x Gen3 x8 slots (x8 link)
Appearance
Form Factor (RU) 2U 2U
Size (Height x Width x Depth) 88 mm x 482 mm x 724 mm 88 mm x 482 mm x 724 mm
Weight 17.26 kg 16.5 kg
Rack Installation Support* 4-post 19" rack (Synology Rail Kit - RKS-02) 4-post 19" rack (Synology Rail Kit - RKS-02)
Notes The rail kit is sold separately The rail kit is sold separately
Others
System Fan 80 mm x 80 mm x 4 pcs 80 mm x 80 mm x 4 pcs
Fan Speed Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
Easy Replacement System Fan
Power Recovery
Noise Level* 53.7 dB(A) 55.5 dB(A)
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter 800 watts 550 watts
Redundant Power Supply
AC Input Power Voltage 100V to 240V AC 100V to 240V AC
Power Frequency 50/60 Hz, Single Phase 50/60 Hz, Single Phase
Power Consumption* 288.49 watts (Access)
145.8 watts (HDD Hibernation)		 180.5 watts (Access)
88.56 watts (HDD Hibernation)
British Thermal Unit 984.37 BTU/hr (Access)
497.49 BTU/hr (HDD Hibernation)		 615.89 BTU/hr (Access)
302.18 BTU/hr (HDD Hibernation)
Notes
  • 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%
  • Power consumption is measured when it is fully loaded with HGST 1.8TB HUC101818CS4204 hard drive(s).
  • For more information on how power consumption is measured, refer to this article.
  • Noise testing was conducted with the Synology system fully installed with Synology SATA SSDs and in an idle state. Two G.R.A.S. type 40AE microphones were placed at a 1 m distance from the front and rear of the device. Background noise: 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) 0°C to 35°C (32°F to 95°F)
Storage Temperature -20°C to 60°C (-5°F to 140°F) -20°C to 60°C (-5°F to 140°F)
Relative Humidity 5% to 95% RH 5% to 95% RH
Certification
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • UKCA
  • EAC
  • CCC
  • KC
  • BIS
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • UKCA
  • EAC
  • CCC
  • KC
  • BIS
  • UL
Warranty 5 Years 5 Years
Notes The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment RoHS Compliant RoHS Compliant
Packaging Content
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1
Optional Accessories
Notes
  • For multi-module memory configurations, all modules must be identical and share the same model number. Check the Product Manual of your Synology product for recommended memory configurations.
  • Expansion Unit FX2421 can only be used with identical expansion units.
 For multi-module memory configurations, all modules must be identical and share the same model number. Check the Product Manual of your Synology product for recommended memory configurations.
Software Specs
DSM Specifications
Storage Management
Maximum Single Volume Size
  • 1 PB (64 GB memory required, for RAID 6 groups only)
  • 200 TB
  • 108 TB
  • 1 PB (64 GB memory required, for RAID 6 groups only)
  • 200 TB
  • 108 TB
Maximum Internal Volume Number 256 256
SSD Read/Write Cache (Determining cache size)
SSD TRIM
RAID Group
Supported RAID Type
  • RAID F1
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • 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
  • RAID 5 to RAID 6
  • Basic to RAID 1
  • Basic to RAID 5
  • RAID 1 to RAID 5
  • RAID 5 to RAID 6
Volume Expansion with Larger HDDs
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Volume Expansion by Adding a HDD
  • RAID F1
  • JBOD
  • RAID 5
  • RAID 6
  • RAID F1
  • JBOD
  • RAID 5
  • RAID 6
Global Hot Spare Supported RAID Type
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Notes
  • Actual maximum storage pool and volume sizes depend on drive sizes used, the number of drive bays available, and the RAID configuration.
  • 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.
  • When Peta Volume is enabled, validated services and packages are required. Please refer to this article for more information on limitations.
  • Volumes over 108 TB require 32 GB of memory or more.
  • Actual maximum storage pool and volume sizes depend on drive sizes used, the number of drive bays available, and the RAID configuration.
  • 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.
  • When Peta Volume is enabled, validated services and packages are required. Please refer to this article for more information on limitations.
File System
Internal Drives
  • Btrfs
  • ext4
  • Btrfs
  • ext4
External Drives
  • Btrfs
  • ext4
  • ext3
  • FAT32
  • NTFS
  • HFS+
  • exFAT
  • Btrfs
  • ext4
  • ext3
  • FAT32
  • NTFS
  • HFS+
  • exFAT
File Services
File Protocol
  • SMB
  • AFP
  • NFS
  • FTP
  • WebDAV
  • Rsync
  • SMB
  • AFP
  • NFS
  • FTP
  • WebDAV
  • Rsync
Maximum Number of SMB Connections (FSCT-Based) 10,000 10,000
Windows Access Control List (ACL) Integration
NFS Kerberos Authentication
Notes
  • Connection value of this model is tested with Synology SATA SSD fully populated and up to four 10GbE network ports
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • The testing standard was based on client computers running Windows Server 2022 and Microsoft File Server Capacity Tool (FSCT).
  • Connection value of this model is tested with Synology SATA SSD fully populated and up to four 10GbE network ports
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • The testing standard was based on client computers running Windows Server 2022 and Microsoft File Server Capacity Tool (FSCT).
Account & Shared Folder
Maximum Local User Accounts 15,360 15,360
Maximum Local Groups 512 512
Maximum Shared Folder 512 512
Maximum Shared Folder Sync Tasks 32 32
Hybrid Share
Hybrid Share Folder Number 30 30
Hyper Backup
Data & Folder Backup
Entire System Backup
Notes Full-system backup requires DSM 7.2 or later. Full-system backup requires DSM 7.2 or later.
High Availability
Synology High Availability
Log Center
Syslog Events per Second 3,000 3,000
Virtualization
VMware ESXi 6.5 and VAAI
Windows Server 2016
Windows Server 2019
Windows Server 2022
Citrix Ready
OpenStack
General Specifications
Supported Protocols SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV 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
  • 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 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. For an updated list of supported browser versions, check the DSM Technical Specifications.
Add-on Packages view the complete package list
Central Management System
Synology Chat
Maximum Number of Users 1,500 1,500
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.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • 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.
  • Models with expandable memory are tested with the maximum supported quantity installed.
Download Station
Maximum Concurrent Download Tasks 80
SAN Manager
Maximum iSCSI Target Number 256 256
Maximum LUN 512 512
LUN Clone/Snapshot, Windows ODX
Synology MailPlus / MailPlus Server
Free Email Accounts 5 (Additional accounts require purchase of licenses) 5 (Additional accounts require purchase of licenses)
Maximum Number of Users 19,000 14,500
Notes
  • The suggested maximum number of users is based on the following workload: 20% of users with a 20,000 item mailbox randomly performing actions and receiving 240 emails per day, and 80% of users receiving 20 emails per day. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed. Learn more about memory requirements.
  • Operating in high-availability mode will incur additional overhead.
  • Features enabled during evaluation: anti-spam, anti-virus, DNSBL, greylist, content scanning, and full-text search (English).
  • The suggested maximum number of users is based on the following workload: 20% of users with a 20,000 item mailbox randomly performing actions and receiving 240 emails per day, and 80% of users receiving 20 emails per day. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed. Learn more about memory requirements.
  • Operating in high-availability mode will incur additional overhead.
  • Features enabled during evaluation: anti-spam, anti-virus, DNSBL, greylist, content scanning, and full-text search (English).
Media Server
DLNA Compliance
Synology Photos
Facial Recognition
Object Recognition
Snapshot Replication
Maximum Snapshots per Shared Folder 1,024 1,024
Maximum of System Snapshots 65,536 65,536
Surveillance Station
Default Licenses 2 (Additional cameras require purchase of licenses) 2 (Additional cameras require purchase of licenses)
Suggested Maximum IP Cameras and Total FPS (H.264)
  • 1080p: 485 channels, 4850 FPS
  • 3M: 450 channels, 4500 FPS
  • 5M: 300 channels, 3000 FPS
  • 4K: 220 channels, 2200 FPS
  • 1080p: 160 channels, 2800 FPS
  • 3M: 160 channels, 1600 FPS
  • 5M: 120 channels, 1200 FPS
  • 4K: 80 channels, 800 FPS
Suggested Maximum IP Cameras and Total FPS (H.265)
  • 1080p: 520 channels, 15600 FPS
  • 3M: 485 channels, 4850 FPS
  • 5M: 450 channels, 4500 FPS
  • 4K: 300 channels, 3000 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, with their default memory configuration, and 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.
  • The number of streams that can be viewed simultaneously is twice the suggested maximum number of cameras. For example, if the suggested maximum number of cameras for a model is 10 under H.264, 1080p, the model can support up to 20 streams of the same specification at the same time.
  • 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, with their default memory configuration, and 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.
  • The number of streams that can be viewed simultaneously is twice the suggested maximum number of cameras. For example, if the suggested maximum number of cameras for a model is 10 under H.264, 1080p, the model can support up to 20 streams of the same specification at the same time.
  • Maximum supported frames per second can be increased by adding one expansion unit. For detailed figures, please refer to this article.
Synology Drive
Maximum Number of Users 20,500 24,800
Maximum Number of Hosted Files 100,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above) 100,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
Notes
  • The suggested maximum number of users is based on the following workload: 20% of users randomly perform file operations (upload, download, move, and delete), and 80% of users are logged in but idle. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
  • The suggested maximum number of users is based on the following workload: 20% of users randomly perform file operations (upload, download, move, and delete), and 80% of users are logged in but idle. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
Synology Office
Maximum Number of Users 16,200 21,300
Notes
  • The suggested maximum number of users is based on the following workload: 20% of users are executing random actions at an average of 30-second intervals, and 80% of users are logged in and viewing a file. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
  • The suggested maximum number of users is based on the following workload: 20% of users are executing random actions at an average of 30-second intervals, and 80% of users are logged in and viewing a file. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
Virtual Machine Manager
Recommended Virtual Machine Instances 32 (Learn more) 24 (Learn more)
Recommended Virtual DSM Number (Licenses required) 32 (including 1 Free License) 24 (including 1 Free License)
Notes The specifications vary depending on system configuration and memory size. The specifications vary depending on system configuration and memory size.
VPN Server
Maximum Connections 32 32
Hardware Specs
Hardware Specifications
CPU
CPU Model
FS6400 Intel Xeon Silver 4110
SA6400 AMD EPYC 7272
CPU Quantity
FS6400 2
SA6400 1
CPU Core
FS6400 8
SA6400 12
CPU Architecture
FS6400 64-bit
SA6400 64-bit
CPU Frequency
FS6400 2.1 (base) / 3.0 (turbo) GHz
SA6400 2.9 (base) / 3.2 (turbo) GHz
Hardware Encryption Engine
FS6400
SA6400
Memory
System Memory
FS6400 32 GB DDR4 ECC RDIMM
SA6400 32 GB DDR4 ECC RDIMM
Memory Module Pre-installed
FS6400 32 GB (16 GB x 2)
SA6400 32 GB (32 GB x 1)
Total Memory Slots
FS6400 16
SA6400 16
Maximum Memory Capacity
FS6400 512 GB (32 GB x 16)
SA6400 1024 GB (64 GB x 16)
Notes
FS6400
  • 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.
  • For more information on the recommended memory configurations, visit here.
SA6400
  • 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.
  • For multi-module memory configurations, all modules must be identical and share the same model number. Check the Product Manual of your Synology product for recommended memory configurations.
Storage
Drive Bays
FS6400 24
SA6400 12
Maximum Drive Bays with Expansion Unit
FS6400 72 (FX2421 x 2)
SA6400 108 (RX1223RP x 8)
Drive Type (See all supported drives)
FS6400
  • 2.5" SAS HDD
  • 2.5" SAS SSD
  • 2.5" SATA SSD
SA6400
  • 3.5" SATA HDD
  • 2.5" SATA SSD
Hot Swappable Drive*
FS6400
SA6400
Notes
FS6400
SA6400 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.
External Ports
RJ-45 1GbE LAN Port
FS6400 2
SA6400 4
RJ-45 10GbE LAN Port
FS6400 2
SA6400 2
Out-of-Band Management LAN Port
FS6400
SA6400 1
Max. Number of LAN Ports
FS6400
SA6400 15
USB 3.2 Gen 1 Port
FS6400 2
SA6400 2
Expansion Port
FS6400 1
SA6400 8
Expansion Port Type
FS6400 Mini-SAS HD
SA6400 Mini-SAS HD
PCIe
PCIe Expansion
FS6400 2 x Gen3 x8 slots (x8 link)
SA6400 2 x Gen3 x8 slots (x8 link)
Appearance
Form Factor (RU)
FS6400 2U
SA6400 2U
Size (Height x Width x Depth)
FS6400 88 mm x 482 mm x 724 mm
SA6400 88 mm x 482 mm x 724 mm
Weight
FS6400 17.26 kg
SA6400 16.5 kg
Rack Installation Support*
FS6400 4-post 19" rack (Synology Rail Kit - RKS-02)
SA6400 4-post 19" rack (Synology Rail Kit - RKS-02)
Notes
FS6400 The rail kit is sold separately
SA6400 The rail kit is sold separately
Others
System Fan
FS6400 80 mm x 80 mm x 4 pcs
SA6400 80 mm x 80 mm x 4 pcs
Fan Speed Mode
FS6400
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
SA6400
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
Easy Replacement System Fan
FS6400
SA6400
Power Recovery
FS6400
SA6400
Noise Level*
FS6400 53.7 dB(A)
SA6400 55.5 dB(A)
Scheduled Power On / Off
FS6400
SA6400
Wake on LAN / WAN
FS6400
SA6400
Power Supply Unit / Adapter
FS6400 800 watts
SA6400 550 watts
Redundant Power Supply
FS6400
SA6400
AC Input Power Voltage
FS6400 100V to 240V AC
SA6400 100V to 240V AC
Power Frequency
FS6400 50/60 Hz, Single Phase
SA6400 50/60 Hz, Single Phase
Power Consumption*
FS6400 288.49 watts (Access)
145.8 watts (HDD Hibernation)
SA6400 180.5 watts (Access)
88.56 watts (HDD Hibernation)
British Thermal Unit
FS6400 984.37 BTU/hr (Access)
497.49 BTU/hr (HDD Hibernation)
SA6400 615.89 BTU/hr (Access)
302.18 BTU/hr (HDD Hibernation)
Notes
FS6400
  • 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%
  • Power consumption is measured when it is fully loaded with HGST 1.8TB HUC101818CS4204 hard drive(s).
SA6400
  • For more information on how power consumption is measured, refer to this article.
  • Noise testing was conducted with the Synology system fully installed with Synology SATA SSDs and in an idle state. Two G.R.A.S. type 40AE microphones were placed at a 1 m distance from the front and rear of the device. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%.
Temperature
Operating Temperature
FS6400 0°C to 35°C (32°F to 95°F)
SA6400 0°C to 35°C (32°F to 95°F)
Storage Temperature
FS6400 -20°C to 60°C (-5°F to 140°F)
SA6400 -20°C to 60°C (-5°F to 140°F)
Relative Humidity
FS6400 5% to 95% RH
SA6400 5% to 95% RH
Certification
FS6400
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • UKCA
  • EAC
  • CCC
  • KC
  • BIS
SA6400
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • UKCA
  • EAC
  • CCC
  • KC
  • BIS
  • UL
Warranty
FS6400 5 Years
SA6400 5 Years
Notes
FS6400 The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
SA6400 The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment
FS6400 RoHS Compliant
SA6400 RoHS Compliant
Packaging Content
FS6400
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1
SA6400
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1
Optional Accessories
FS6400
SA6400
Notes
FS6400
  • For multi-module memory configurations, all modules must be identical and share the same model number. Check the Product Manual of your Synology product for recommended memory configurations.
  • Expansion Unit FX2421 can only be used with identical expansion units.
SA6400 For multi-module memory configurations, all modules must be identical and share the same model number. Check the Product Manual of your Synology product for recommended memory configurations.
Software Specs
DSM Specifications
Storage Management
Maximum Single Volume Size
FS6400
  • 1 PB (64 GB memory required, for RAID 6 groups only)
  • 200 TB
  • 108 TB
SA6400
  • 1 PB (64 GB memory required, for RAID 6 groups only)
  • 200 TB
  • 108 TB
Maximum Internal Volume Number
FS6400 256
SA6400 256
SSD Read/Write Cache (Determining cache size)
FS6400
SA6400
SSD TRIM
FS6400
SA6400
RAID Group
FS6400
SA6400
Supported RAID Type
FS6400
  • RAID F1
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
SA6400
  • RAID F1
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
RAID Migration
FS6400
  • Basic to RAID 1
  • Basic to RAID 5
  • RAID 1 to RAID 5
  • RAID 5 to RAID 6
SA6400
  • Basic to RAID 1
  • Basic to RAID 5
  • RAID 1 to RAID 5
  • RAID 5 to RAID 6
Volume Expansion with Larger HDDs
FS6400
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
SA6400
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Volume Expansion by Adding a HDD
FS6400
  • RAID F1
  • JBOD
  • RAID 5
  • RAID 6
SA6400
  • RAID F1
  • JBOD
  • RAID 5
  • RAID 6
Global Hot Spare Supported RAID Type
FS6400
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
SA6400
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Notes
FS6400
  • Actual maximum storage pool and volume sizes depend on drive sizes used, the number of drive bays available, and the RAID configuration.
  • 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.
  • When Peta Volume is enabled, validated services and packages are required. Please refer to this article for more information on limitations.
SA6400
  • Volumes over 108 TB require 32 GB of memory or more.
  • Actual maximum storage pool and volume sizes depend on drive sizes used, the number of drive bays available, and the RAID configuration.
  • 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.
  • When Peta Volume is enabled, validated services and packages are required. Please refer to this article for more information on limitations.
File System
Internal Drives
FS6400
  • Btrfs
  • ext4
SA6400
  • Btrfs
  • ext4
External Drives
FS6400
  • Btrfs
  • ext4
  • ext3
  • FAT32
  • NTFS
  • HFS+
  • exFAT
SA6400
  • Btrfs
  • ext4
  • ext3
  • FAT32
  • NTFS
  • HFS+
  • exFAT
File Services
File Protocol
FS6400
  • SMB
  • AFP
  • NFS
  • FTP
  • WebDAV
  • Rsync
SA6400
  • SMB
  • AFP
  • NFS
  • FTP
  • WebDAV
  • Rsync
Maximum Number of SMB Connections (FSCT-Based)
FS6400 10,000
SA6400 10,000
Windows Access Control List (ACL) Integration
FS6400
SA6400
NFS Kerberos Authentication
FS6400
SA6400
Notes
FS6400
  • Connection value of this model is tested with Synology SATA SSD fully populated and up to four 10GbE network ports
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • The testing standard was based on client computers running Windows Server 2022 and Microsoft File Server Capacity Tool (FSCT).
SA6400
  • Connection value of this model is tested with Synology SATA SSD fully populated and up to four 10GbE network ports
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • The testing standard was based on client computers running Windows Server 2022 and Microsoft File Server Capacity Tool (FSCT).
Account & Shared Folder
Maximum Local User Accounts
FS6400 15,360
SA6400 15,360
Maximum Local Groups
FS6400 512
SA6400 512
Maximum Shared Folder
FS6400 512
SA6400 512
Maximum Shared Folder Sync Tasks
FS6400 32
SA6400 32
Hybrid Share
Hybrid Share Folder Number
FS6400 30
SA6400 30
Hyper Backup
Data & Folder Backup
FS6400
SA6400
Entire System Backup
FS6400
SA6400
Notes
FS6400 Full-system backup requires DSM 7.2 or later.
SA6400 Full-system backup requires DSM 7.2 or later.
High Availability
Synology High Availability
FS6400
SA6400
Log Center
FS6400
SA6400
Syslog Events per Second
FS6400 3,000
SA6400 3,000
Virtualization
VMware ESXi 6.5 and VAAI
FS6400
SA6400
Windows Server 2016
FS6400
SA6400
Windows Server 2019
FS6400
SA6400
Windows Server 2022
FS6400
SA6400
Citrix Ready
FS6400
SA6400
OpenStack
FS6400
SA6400
General Specifications
Supported Protocols
FS6400 SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
SA6400 SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers
FS6400
  • Chrome
  • Firefox
  • Edge
  • Safari
SA6400
  • Chrome
  • Firefox
  • Edge
  • Safari
Supported Language
FS6400 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
SA6400 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
FS6400 For an updated list of supported browser versions, check the DSM Technical Specifications.
SA6400 For an updated list of supported browser versions, check the DSM Technical Specifications.
Add-on Packages view the complete package list
Central Management System
FS6400
SA6400
Synology Chat
FS6400
SA6400
Maximum Number of Users
FS6400 1,500
SA6400 1,500
Notes
FS6400
  • 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.
  • Models with expandable memory are tested with the maximum supported quantity installed.
SA6400
  • 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.
  • Models with expandable memory are tested with the maximum supported quantity installed.
Download Station
FS6400
SA6400
Maximum Concurrent Download Tasks
FS6400
SA6400 80
SAN Manager
FS6400
SA6400
Maximum iSCSI Target Number
FS6400 256
SA6400 256
Maximum LUN
FS6400 512
SA6400 512
LUN Clone/Snapshot, Windows ODX
FS6400
SA6400
Synology MailPlus / MailPlus Server
FS6400
SA6400
Free Email Accounts
FS6400 5 (Additional accounts require purchase of licenses)
SA6400 5 (Additional accounts require purchase of licenses)
Maximum Number of Users
FS6400 19,000
SA6400 14,500
Notes
FS6400
  • The suggested maximum number of users is based on the following workload: 20% of users with a 20,000 item mailbox randomly performing actions and receiving 240 emails per day, and 80% of users receiving 20 emails per day. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed. Learn more about memory requirements.
  • Operating in high-availability mode will incur additional overhead.
  • Features enabled during evaluation: anti-spam, anti-virus, DNSBL, greylist, content scanning, and full-text search (English).
SA6400
  • The suggested maximum number of users is based on the following workload: 20% of users with a 20,000 item mailbox randomly performing actions and receiving 240 emails per day, and 80% of users receiving 20 emails per day. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed. Learn more about memory requirements.
  • Operating in high-availability mode will incur additional overhead.
  • Features enabled during evaluation: anti-spam, anti-virus, DNSBL, greylist, content scanning, and full-text search (English).
Media Server
FS6400
SA6400
DLNA Compliance
FS6400
SA6400
Synology Photos
FS6400
SA6400
Facial Recognition
FS6400
SA6400
Object Recognition
FS6400
SA6400
Snapshot Replication
FS6400
SA6400
Maximum Snapshots per Shared Folder
FS6400 1,024
SA6400 1,024
Maximum of System Snapshots
FS6400 65,536
SA6400 65,536
Surveillance Station
FS6400
SA6400
Default Licenses
FS6400 2 (Additional cameras require purchase of licenses)
SA6400 2 (Additional cameras require purchase of licenses)
Suggested Maximum IP Cameras and Total FPS (H.264)
FS6400
  • 1080p: 485 channels, 4850 FPS
  • 3M: 450 channels, 4500 FPS
  • 5M: 300 channels, 3000 FPS
  • 4K: 220 channels, 2200 FPS
SA6400
  • 1080p: 160 channels, 2800 FPS
  • 3M: 160 channels, 1600 FPS
  • 5M: 120 channels, 1200 FPS
  • 4K: 80 channels, 800 FPS
Suggested Maximum IP Cameras and Total FPS (H.265)
FS6400
  • 1080p: 520 channels, 15600 FPS
  • 3M: 485 channels, 4850 FPS
  • 5M: 450 channels, 4500 FPS
  • 4K: 300 channels, 3000 FPS
SA6400
  • 1080p: 200 channels, 6000 FPS
  • 3M: 160 channels, 2800 FPS
  • 5M: 160 channels, 1600 FPS
  • 4K: 120 channels, 1200 FPS
Notes
FS6400
  • 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, with their default memory configuration, and 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.
  • The number of streams that can be viewed simultaneously is twice the suggested maximum number of cameras. For example, if the suggested maximum number of cameras for a model is 10 under H.264, 1080p, the model can support up to 20 streams of the same specification at the same time.
SA6400
  • 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, with their default memory configuration, and 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.
  • The number of streams that can be viewed simultaneously is twice the suggested maximum number of cameras. For example, if the suggested maximum number of cameras for a model is 10 under H.264, 1080p, the model can support up to 20 streams of the same specification at the same time.
  • Maximum supported frames per second can be increased by adding one expansion unit. For detailed figures, please refer to this article.
Synology Drive
FS6400
SA6400
Maximum Number of Users
FS6400 20,500
SA6400 24,800
Maximum Number of Hosted Files
FS6400 100,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
SA6400 100,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
Notes
FS6400
  • The suggested maximum number of users is based on the following workload: 20% of users randomly perform file operations (upload, download, move, and delete), and 80% of users are logged in but idle. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
SA6400
  • The suggested maximum number of users is based on the following workload: 20% of users randomly perform file operations (upload, download, move, and delete), and 80% of users are logged in but idle. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
Synology Office
FS6400
SA6400
Maximum Number of Users
FS6400 16,200
SA6400 21,300
Notes
FS6400
  • The suggested maximum number of users is based on the following workload: 20% of users are executing random actions at an average of 30-second intervals, and 80% of users are logged in and viewing a file. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
SA6400
  • The suggested maximum number of users is based on the following workload: 20% of users are executing random actions at an average of 30-second intervals, and 80% of users are logged in and viewing a file. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
Virtual Machine Manager
FS6400
SA6400
Recommended Virtual Machine Instances
FS6400 32 (Learn more)
SA6400 24 (Learn more)
Recommended Virtual DSM Number (Licenses required)
FS6400 32 (including 1 Free License)
SA6400 24 (including 1 Free License)
Notes
FS6400 The specifications vary depending on system configuration and memory size.
SA6400 The specifications vary depending on system configuration and memory size.
VPN Server
FS6400
SA6400
Maximum Connections
FS6400 32
SA6400 32