Comparison results

Highlight Differences

FS2500

FS3410

FS3600

FS6400

Hardware Specifications
CPU
CPU Model	AMD Ryzen V1780B	Intel Xeon D-1541	Intel Xeon D-1567	Intel Xeon Silver 4110
CPU Quantity	1	1	1	2
CPU Core	4	8	12	8
CPU Architecture	64-bit	64-bit	64-bit	64-bit
CPU Frequency	3.35 (base) / 3.6 (turbo) GHz	2.1 (base) / 2.7 (turbo) GHz	2.1 (base) / 2.7 (turbo) GHz	2.1 (base) / 3.0 (turbo) GHz
Hardware Encryption Engine
Memory
System Memory	8 GB DDR4 ECC UDIMM	16 GB DDR4 ECC RDIMM	16 GB DDR4 ECC RDIMM	32 GB DDR4 ECC RDIMM
Memory Module Pre-installed	8 GB (8 GB x 1)	16 GB (16 GB x 1)	16 GB (16 GB x 1)	32 GB (16 GB x 2)
Total Memory Slots	2	4	4	16
Maximum Memory Capacity	32 GB (16 GB x 2)	128 GB (32 GB x 4)	128 GB (32 GB x 4)	512 GB (32 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 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.	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.	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.	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.
Storage
Drive Bays	12	24	24	24
Maximum Drive Bays with Expansion Unit			72 (FX2421 x 2)	72 (FX2421 x 2)
Drive Type (See all supported drives)	2.5" SATA SSD	2.5" SATA SSD	2.5" SAS SSD* 2.5" SAS HDD* 2.5" SATA SSD	2.5" SAS HDD 2.5" SAS SSD 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.	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.	2.5" SAS HDD and 2.5" SAS SSD only indicate the drive types that may be compatible with Synology devices. For supported drive models, please refer to the device’s compatibility list.
External Ports
RJ-45 1GbE LAN Port	2	4	4	2
RJ-45 10GbE LAN Port	2	2	2	2
Out-of-Band Management LAN Port		1
Max. Number of LAN Ports		15
USB 3.2 Gen 1 Port	2	2	2	2
Expansion Port			1	1
Expansion Port Type			Mini-SAS HD	Mini-SAS HD
Notes	MTU value of 1GbE LAN port has a limit of 1500.	MTU value of 1GbE LAN port has a limit of 1500.
PCIe
PCIe Expansion	1 x Gen3 x8 slot (x4 link)	2 x Gen3 x8 slots (x8 link)	1 x Gen3 x8 slot (x8 link)	2 x Gen3 x8 slots (x8 link)
Appearance
Form Factor (RU)	1U	2U	2U	2U
Size (Height x Width x Depth)	44 mm x 481.9 mm x 555.9 mm	88 mm x 482 mm x 724 mm	88 mm x 482 mm x 724 mm	88 mm x 482 mm x 724 mm
Weight	8.3 kg	15.0 kg	14.9 kg	17.26 kg
Rack Installation Support*	4-post 19" rack (Synology Rail Kit - RKS-01)	4-post 19" rack (Synology Rail Kit - RKS-02)	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	The rail kit is sold separately	The rail kit is sold separately
Others
System Fan	40 mm x 40 mm x 4 pcs	80 mm x 80 mm x 4 pcs	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	Full-Speed Mode Cool Mode Quiet Mode	Full-Speed Mode Cool Mode Quiet Mode
Easy Replacement System Fan
Power Recovery
Noise Level*	57.6 dB(A)	46.1 dB(A)	57 dB(A)	53.7 dB(A)
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter	350 watts	550 watts	500 watts	800 watts
Redundant Power Supply
AC Input Power Voltage	100V to 240V AC	100V to 240V AC	100V to 240V AC	100V to 240V AC
Power Frequency	50/60 Hz, Single Phase	50/60 Hz, Single Phase	50/60 Hz, Single Phase	50/60 Hz, Single Phase
Power Consumption*	74.83 watts (Access)	113.84 watts (Access)	258.23 watts (Access) 127.99 watts (HDD Hibernation)	288.49 watts (Access) 145.8 watts (HDD Hibernation)
British Thermal Unit	255.17 BTU/hr (Access)	388.70 BTU/hr (Access)	881.12 BTU/hr (Access) 436.72 BTU/hr (HDD Hibernation)	984.37 BTU/hr (Access) 497.49 BTU/hr (HDD Hibernation)
Notes	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%.	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%.	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).	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).
Temperature
Operating Temperature	0°C to 35°C (32°F to 95°F)	0°C to 35°C (32°F to 95°F)	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)	-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	5% to 95% RH	5% to 95% RH
Certification	FCC CE BSMI VCCI RCM UKCA EAC KC UL	FCC CE BSMI VCCI RCM UKCA EAC CCC KC UL	FCC CE BSMI VCCI RCM EAC CCC	FCC CE BSMI VCCI RCM UKCA EAC CCC KC BIS
Warranty	5 Years	5 Years	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)	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	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	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	DDR4 ECC UDIMM: D4EU01-8G/D4EU01-16G Enterprise Series 2.5" SATA SSD: SAT5200 Series 25GbE Network Interface Card: E25G30-F2 10GbE Network Interface Card: E10G30-F2/E10G30-T2/E10G18-T1 Rail Kit Sliding: RKS-01	DDR4 ECC RDIMM: D4ER01-16G*/D4ER01-32G Enterprise Series 2.5" SATA SSD: SAT5200 Series 25GbE Network Interface Card: E25G30-F2 10GbE Network Interface Card: E10G30-F2/E10G30-T2/E10G18-T1 Rail Kit Sliding: RKS-02	DDR4 ECC RDIMM: D4RD-2666-16G/D4ER02-32G Expansion Units: FX2421*/RX1222sas Enterprise Series 2.5" SATA SSD: SAT5200 Series 25GbE Network Interface Card: E25G30-F2 10GbE Network Interface Card: E10G30-F2/E10G30-T2/E10G18-T1 Rail Kit Sliding: RKS-02	DDR4 ECC RDIMM: D4RD-2666-16G Expansion Units: FX2421*/RX1222sas Enterprise Series 2.5" SATA SSD: SAT5200 Series 25GbE Network Interface Card: E25G30-F2 10GbE Network Interface Card: E10G30-F2/E10G30-T2/E10G18-T1 Rail Kit Sliding: RKS-02
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.	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.	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. Expansion Unit FX2421 can only be used with identical expansion units.

DSM Specifications
Storage Management
Maximum Single Volume Size	200 TB (32 GB memory required) 108 TB	1 PB (64 GB memory required, for RAID 6 groups only) 200 TB (32 GB memory required) 108 TB	1 PB (64 GB memory required, for RAID 6 groups only) 200 TB (32 GB memory required) 108 TB	1 PB (64 GB memory required, for RAID 6 groups only) 200 TB 108 TB
Maximum Internal Volume Number	256	256	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 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	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	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	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	RAID F1 RAID 1 RAID 5 RAID 6 RAID 10	RAID F1 RAID 1 RAID 5 RAID 6 RAID 10
Notes	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.	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.	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.	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	Btrfs ext4	Btrfs ext4
External Drives	Btrfs ext4 ext3 FAT32 NTFS HFS+ exFAT	Btrfs ext4 ext3 FAT32 NTFS HFS+ exFAT	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	SMB AFP NFS FTP WebDAV Rsync	SMB AFP NFS FTP WebDAV Rsync
Maximum Number of SMB Connections (FSCT-Based) with RAM Expansion	700	2,100	2,700	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 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 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 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 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	2,048	5,120	10,240	15,360
Maximum Local Groups	512	512	512	512
Maximum Shared Folder	512	512	512	512
Maximum Shared Folder Sync Tasks	12	32	32	32
Hybrid Share
Hybrid Share Folder Number	15	15	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.	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	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	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	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	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.	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	300	500	600	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.	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.
SAN Manager
Maximum iSCSI Target Number	64	128	256	256
Maximum LUN	128	256	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)	5 (Additional accounts require purchase of licenses)	5 (Additional accounts require purchase of licenses)
Maximum Number of Users	1,600	4,500	5,800	19,000
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).	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).
Snapshot Replication
Maximum Snapshots per Shared Folder	256	512	1,024	1,024
Maximum of System Snapshots	4,096	16,384	65,536	65,536
Surveillance Station
Default Licenses	2 (Additional cameras require purchase of licenses)	2 (Additional cameras require purchase of 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: 100 channels, 2800 FPS 3M: 100 channels, 1200 FPS 5M: 70 channels, 700 FPS 4K: 50 channels, 500 FPS	1080p: 160 channels, 2800 FPS 3M: 160 channels, 1600 FPS 5M: 120 channels, 1200 FPS 4K: 80 channels, 800 FPS	1080p: 160 channels, 3840 FPS 3M: 160 channels, 1600 FPS 5M: 120 channels, 1200 FPS 4K: 80 channels, 800 FPS	1080p: 485 channels, 4850 FPS 3M: 450 channels, 4500 FPS 5M: 300 channels, 3000 FPS 4K: 220 channels, 2200 FPS
Suggested Maximum IP Cameras and Total FPS (H.265)	1080p: 100 channels, 3000 FPS 3M: 100 channels, 2400 FPS 5M: 100 channels, 1300 FPS 4K: 80 channels, 800 FPS	1080p: 200 channels, 6000 FPS 3M: 160 channels, 2800 FPS 5M: 160 channels, 1600 FPS 4K: 120 channels, 1200 FPS	1080p: 200 channels, 6000 FPS 3M: 160 channels, 2800 FPS 5M: 160 channels, 1600 FPS 4K: 120 channels, 1200 FPS	1080p: 520 channels, 15600 FPS 3M: 485 channels, 4850 FPS 5M: 450 channels, 4500 FPS 4K: 300 channels, 3000 FPS
Notes	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.	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.
Synology Drive
Maximum Number of Users	1,300	3,900	5,000	20,500
Maximum Number of Hosted Files	15,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)	25,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)	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)	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.	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	1,300	3,700	4,800	16,200
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	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	8 (Learn more)	16 (Learn more)	24 (Learn more)	32 (Learn more)
Recommended Virtual DSM Number (Licenses required)	8 (including 1 Free License)	16 (including 1 Free License)	24 (including 1 Free License)	32 (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.	The specifications vary depending on system configuration and memory size.	The specifications vary depending on system configuration and memory size.
VPN Server
Maximum Connections	12	32	32	32

Hardware Specs

Hardware Specifications

CPU

CPU Model

FS2500	AMD Ryzen V1780B
FS3410	Intel Xeon D-1541
FS3600	Intel Xeon D-1567
FS6400	Intel Xeon Silver 4110

CPU Quantity

FS2500	1
FS3410	1
FS3600	1
FS6400	2

CPU Core

FS2500	4
FS3410	8
FS3600	12
FS6400	8

CPU Architecture

FS2500	64-bit
FS3410	64-bit
FS3600	64-bit
FS6400	64-bit

CPU Frequency

FS2500	3.35 (base) / 3.6 (turbo) GHz
FS3410	2.1 (base) / 2.7 (turbo) GHz
FS3600	2.1 (base) / 2.7 (turbo) GHz
FS6400	2.1 (base) / 3.0 (turbo) GHz

Hardware Encryption Engine

FS2500
FS3410
FS3600
FS6400

Memory

System Memory

FS2500	8 GB DDR4 ECC UDIMM
FS3410	16 GB DDR4 ECC RDIMM
FS3600	16 GB DDR4 ECC RDIMM
FS6400	32 GB DDR4 ECC RDIMM

Memory Module Pre-installed

FS2500	8 GB (8 GB x 1)
FS3410	16 GB (16 GB x 1)
FS3600	16 GB (16 GB x 1)
FS6400	32 GB (16 GB x 2)

Total Memory Slots

FS2500	2
FS3410	4
FS3600	4
FS6400	16

Maximum Memory Capacity

FS2500	32 GB (16 GB x 2)
FS3410	128 GB (32 GB x 4)
FS3600	128 GB (32 GB x 4)
FS6400	512 GB (32 GB x 16)

Notes

FS2500	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.
FS3410	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.
FS3600	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.
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.

Storage

Drive Bays

FS2500	12
FS3410	24
FS3600	24
FS6400	24

Maximum Drive Bays with Expansion Unit

FS2500
FS3410
FS3600	72 (FX2421 x 2)
FS6400	72 (FX2421 x 2)

Drive Type (See all supported drives)

FS2500	2.5" SATA SSD
FS3410	2.5" SATA SSD
FS3600	2.5" SAS SSD* 2.5" SAS HDD* 2.5" SATA SSD
FS6400	2.5" SAS HDD 2.5" SAS SSD 2.5" SATA SSD

Hot Swappable Drive*

FS2500
FS3410
FS3600
FS6400

Notes

FS2500	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.
FS3410	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.
FS3600	2.5" SAS HDD and 2.5" SAS SSD only indicate the drive types that may be compatible with Synology devices. For supported drive models, please refer to the device’s compatibility list.
FS6400

External Ports

RJ-45 1GbE LAN Port

FS2500	2
FS3410	4
FS3600	4
FS6400	2

RJ-45 10GbE LAN Port

FS2500	2
FS3410	2
FS3600	2
FS6400	2

Out-of-Band Management LAN Port

FS2500
FS3410	1
FS3600
FS6400

Max. Number of LAN Ports

FS2500
FS3410	15
FS3600
FS6400

USB 3.2 Gen 1 Port

FS2500	2
FS3410	2
FS3600	2
FS6400	2

Expansion Port

FS2500
FS3410
FS3600	1
FS6400	1

Expansion Port Type

FS2500
FS3410
FS3600	Mini-SAS HD
FS6400	Mini-SAS HD

Notes

FS2500	MTU value of 1GbE LAN port has a limit of 1500.
FS3410	MTU value of 1GbE LAN port has a limit of 1500.
FS3600
FS6400

PCIe

PCIe Expansion

FS2500	1 x Gen3 x8 slot (x4 link)
FS3410	2 x Gen3 x8 slots (x8 link)
FS3600	1 x Gen3 x8 slot (x8 link)
FS6400	2 x Gen3 x8 slots (x8 link)

Appearance

Form Factor (RU)

FS2500	1U
FS3410	2U
FS3600	2U
FS6400	2U

Size (Height x Width x Depth)

FS2500	44 mm x 481.9 mm x 555.9 mm
FS3410	88 mm x 482 mm x 724 mm
FS3600	88 mm x 482 mm x 724 mm
FS6400	88 mm x 482 mm x 724 mm

Weight

FS2500	8.3 kg
FS3410	15.0 kg
FS3600	14.9 kg
FS6400	17.26 kg

Rack Installation Support*

FS2500	4-post 19" rack (Synology Rail Kit - RKS-01)
FS3410	4-post 19" rack (Synology Rail Kit - RKS-02)
FS3600	4-post 19" rack (Synology Rail Kit - RKS-02)
FS6400	4-post 19" rack (Synology Rail Kit - RKS-02)

Notes

FS2500	The rail kit is sold separately
FS3410	The rail kit is sold separately
FS3600	The rail kit is sold separately
FS6400	The rail kit is sold separately

Others

System Fan

FS2500	40 mm x 40 mm x 4 pcs
FS3410	80 mm x 80 mm x 4 pcs
FS3600	80 mm x 80 mm x 4 pcs
FS6400	80 mm x 80 mm x 4 pcs

Fan Speed Mode

FS2500	Full-Speed Mode Cool Mode Quiet Mode
FS3410	Full-Speed Mode Cool Mode Quiet Mode
FS3600	Full-Speed Mode Cool Mode Quiet Mode
FS6400	Full-Speed Mode Cool Mode Quiet Mode

Easy Replacement System Fan

FS2500
FS3410
FS3600
FS6400

Power Recovery

FS2500
FS3410
FS3600
FS6400

Noise Level*

FS2500	57.6 dB(A)
FS3410	46.1 dB(A)
FS3600	57 dB(A)
FS6400	53.7 dB(A)

Scheduled Power On / Off

FS2500
FS3410
FS3600
FS6400

Wake on LAN / WAN

FS2500
FS3410
FS3600
FS6400

Power Supply Unit / Adapter

FS2500	350 watts
FS3410	550 watts
FS3600	500 watts
FS6400	800 watts

Redundant Power Supply

FS2500
FS3410
FS3600
FS6400

AC Input Power Voltage

FS2500	100V to 240V AC
FS3410	100V to 240V AC
FS3600	100V to 240V AC
FS6400	100V to 240V AC

Power Frequency

FS2500	50/60 Hz, Single Phase
FS3410	50/60 Hz, Single Phase
FS3600	50/60 Hz, Single Phase
FS6400	50/60 Hz, Single Phase

Power Consumption*

FS2500	74.83 watts (Access)
FS3410	113.84 watts (Access)
FS3600	258.23 watts (Access) 127.99 watts (HDD Hibernation)
FS6400	288.49 watts (Access) 145.8 watts (HDD Hibernation)

British Thermal Unit

FS2500	255.17 BTU/hr (Access)
FS3410	388.70 BTU/hr (Access)
FS3600	881.12 BTU/hr (Access) 436.72 BTU/hr (HDD Hibernation)
FS6400	984.37 BTU/hr (Access) 497.49 BTU/hr (HDD Hibernation)

Notes

FS2500	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%.
FS3410	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%.
FS3600	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).
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).

Temperature

Operating Temperature

FS2500	0°C to 35°C (32°F to 95°F)
FS3410	0°C to 35°C (32°F to 95°F)
FS3600	0°C to 35°C (32°F to 95°F)
FS6400	0°C to 35°C (32°F to 95°F)

Storage Temperature

FS2500	-20°C to 60°C (-5°F to 140°F)
FS3410	-20°C to 60°C (-5°F to 140°F)
FS3600	-20°C to 60°C (-5°F to 140°F)
FS6400	-20°C to 60°C (-5°F to 140°F)

Relative Humidity

FS2500	5% to 95% RH
FS3410	5% to 95% RH
FS3600	5% to 95% RH
FS6400	5% to 95% RH

Certification

FS2500	FCC CE BSMI VCCI RCM UKCA EAC KC UL
FS3410	FCC CE BSMI VCCI RCM UKCA EAC CCC KC UL
FS3600	FCC CE BSMI VCCI RCM EAC CCC
FS6400	FCC CE BSMI VCCI RCM UKCA EAC CCC KC BIS

Warranty

FS2500	5 Years
FS3410	5 Years
FS3600	5 Years
FS6400	5 Years

Notes

FS2500	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
FS3410	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
FS3600	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
FS6400	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)

Environment

FS2500	RoHS Compliant
FS3410	RoHS Compliant
FS3600	RoHS Compliant
FS6400	RoHS Compliant

Packaging Content

FS2500	Main Unit X 1 Accessory Pack X 1 AC Power Cord X 2 Quick Installation Guide X 1
FS3410	Main Unit X 1 Accessory Pack X 1 AC Power Cord X 2 Quick Installation Guide X 1
FS3600	Main Unit X 1 Accessory Pack X 1 AC Power Cord X 2 Quick Installation Guide X 1
FS6400	Main Unit X 1 Accessory Pack X 1 AC Power Cord X 2 Quick Installation Guide X 1

Optional Accessories

FS2500	DDR4 ECC UDIMM: D4EU01-8G/D4EU01-16G Enterprise Series 2.5" SATA SSD: SAT5200 Series 25GbE Network Interface Card: E25G30-F2 10GbE Network Interface Card: E10G30-F2/E10G30-T2/E10G18-T1 Rail Kit Sliding: RKS-01
FS3410	DDR4 ECC RDIMM: D4ER01-16G*/D4ER01-32G Enterprise Series 2.5" SATA SSD: SAT5200 Series 25GbE Network Interface Card: E25G30-F2 10GbE Network Interface Card: E10G30-F2/E10G30-T2/E10G18-T1 Rail Kit Sliding: RKS-02
FS3600	DDR4 ECC RDIMM: D4RD-2666-16G/D4ER02-32G Expansion Units: FX2421*/RX1222sas Enterprise Series 2.5" SATA SSD: SAT5200 Series 25GbE Network Interface Card: E25G30-F2 10GbE Network Interface Card: E10G30-F2/E10G30-T2/E10G18-T1 Rail Kit Sliding: RKS-02
FS6400	DDR4 ECC RDIMM: D4RD-2666-16G Expansion Units: FX2421*/RX1222sas Enterprise Series 2.5" SATA SSD: SAT5200 Series 25GbE Network Interface Card: E25G30-F2 10GbE Network Interface Card: E10G30-F2/E10G30-T2/E10G18-T1 Rail Kit Sliding: RKS-02

Notes

FS2500	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.
FS3410	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.
FS3600	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.
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.

Software Specs

DSM Specifications

Storage Management

Maximum Single Volume Size

FS2500	200 TB (32 GB memory required) 108 TB
FS3410	1 PB (64 GB memory required, for RAID 6 groups only) 200 TB (32 GB memory required) 108 TB
FS3600	1 PB (64 GB memory required, for RAID 6 groups only) 200 TB (32 GB memory required) 108 TB
FS6400	1 PB (64 GB memory required, for RAID 6 groups only) 200 TB 108 TB

Maximum Internal Volume Number

FS2500	256
FS3410	256
FS3600	256
FS6400	256

SSD Read/Write Cache (Determining cache size)

FS2500
FS3410
FS3600
FS6400

SSD TRIM

FS2500
FS3410
FS3600
FS6400

RAID Group

FS2500
FS3410
FS3600
FS6400

Supported RAID Type

FS2500	RAID F1 Basic JBOD RAID 0 RAID 1 RAID 5 RAID 6 RAID 10
FS3410	RAID F1 Basic JBOD RAID 0 RAID 1 RAID 5 RAID 6 RAID 10
FS3600	RAID F1 Basic JBOD RAID 0 RAID 1 RAID 5 RAID 6 RAID 10
FS6400	RAID F1 Basic JBOD RAID 0 RAID 1 RAID 5 RAID 6 RAID 10

RAID Migration

FS2500	Basic to RAID 1 Basic to RAID 5 RAID 1 to RAID 5 RAID 5 to RAID 6
FS3410	Basic to RAID 1 Basic to RAID 5 RAID 1 to RAID 5 RAID 5 to RAID 6
FS3600	Basic to RAID 1 Basic to RAID 5 RAID 1 to RAID 5 RAID 5 to RAID 6
FS6400	Basic to RAID 1 Basic to RAID 5 RAID 1 to RAID 5 RAID 5 to RAID 6

Volume Expansion with Larger HDDs

FS2500	RAID F1 RAID 1 RAID 5 RAID 6 RAID 10
FS3410	RAID F1 RAID 1 RAID 5 RAID 6 RAID 10
FS3600	RAID F1 RAID 1 RAID 5 RAID 6 RAID 10
FS6400	RAID F1 RAID 1 RAID 5 RAID 6 RAID 10

Volume Expansion by Adding a HDD

FS2500	RAID F1 JBOD RAID 5 RAID 6
FS3410	RAID F1 JBOD RAID 5 RAID 6
FS3600	RAID F1 JBOD RAID 5 RAID 6
FS6400	RAID F1 JBOD RAID 5 RAID 6

Global Hot Spare Supported RAID Type

FS2500	RAID F1 RAID 1 RAID 5 RAID 6 RAID 10
FS3410	RAID F1 RAID 1 RAID 5 RAID 6 RAID 10
FS3600	RAID F1 RAID 1 RAID 5 RAID 6 RAID 10
FS6400	RAID F1 RAID 1 RAID 5 RAID 6 RAID 10

Notes

FS2500	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.
FS3410	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.
FS3600	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.
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.

File System

Internal Drives

FS2500	Btrfs ext4
FS3410	Btrfs ext4
FS3600	Btrfs ext4
FS6400	Btrfs ext4

External Drives

FS2500	Btrfs ext4 ext3 FAT32 NTFS HFS+ exFAT
FS3410	Btrfs ext4 ext3 FAT32 NTFS HFS+ exFAT
FS3600	Btrfs ext4 ext3 FAT32 NTFS HFS+ exFAT
FS6400	Btrfs ext4 ext3 FAT32 NTFS HFS+ exFAT

File Services

File Protocol

FS2500	SMB AFP NFS FTP WebDAV Rsync
FS3410	SMB AFP NFS FTP WebDAV Rsync
FS3600	SMB AFP NFS FTP WebDAV Rsync
FS6400	SMB AFP NFS FTP WebDAV Rsync

Maximum Number of SMB Connections (FSCT-Based) with RAM Expansion

FS2500	700
FS3410	2,100
FS3600	2,700
FS6400	10,000

Windows Access Control List (ACL) Integration

FS2500
FS3410
FS3600
FS6400

NFS Kerberos Authentication

FS2500
FS3410
FS3600
FS6400

Notes

FS2500	Connection value of this model is tested with Synology SATA SSD fully populated and up to four 10GbE network ports The testing standard was based on client computers running Windows Server 2022 and Microsoft File Server Capacity Tool (FSCT).
FS3410	Connection value of this model is tested with Synology SATA SSD fully populated and up to four 10GbE network ports The testing standard was based on client computers running Windows Server 2022 and Microsoft File Server Capacity Tool (FSCT).
FS3600	Connection value of this model is tested with Synology SATA SSD fully populated and up to four 10GbE network ports The testing standard was based on client computers running Windows Server 2022 and Microsoft File Server Capacity Tool (FSCT).
FS6400	Connection value of this model is tested with Synology SATA SSD fully populated and up to four 10GbE network ports 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

FS2500	2,048
FS3410	5,120
FS3600	10,240
FS6400	15,360

Maximum Local Groups

FS2500	512
FS3410	512
FS3600	512
FS6400	512

Maximum Shared Folder

FS2500	512
FS3410	512
FS3600	512
FS6400	512

Maximum Shared Folder Sync Tasks

FS2500	12
FS3410	32
FS3600	32
FS6400	32

Hybrid Share

Hybrid Share Folder Number

FS2500	15
FS3410	15
FS3600	30
FS6400	30

Hyper Backup

Data & Folder Backup

FS2500
FS3410
FS3600
FS6400

Entire System Backup

FS2500
FS3410
FS3600
FS6400

Notes

FS2500	Full-system backup requires DSM 7.2 or later.
FS3410	Full-system backup requires DSM 7.2 or later.
FS3600	Full-system backup requires DSM 7.2 or later.
FS6400	Full-system backup requires DSM 7.2 or later.

High Availability

Synology High Availability

FS2500
FS3410
FS3600
FS6400

Log Center

FS2500
FS3410
FS3600
FS6400

Syslog Events per Second

FS2500	3,000
FS3410	3,000
FS3600	3,000
FS6400	3,000

Virtualization

VMware ESXi 6.5 and VAAI

FS2500
FS3410
FS3600
FS6400

Windows Server 2016

FS2500
FS3410
FS3600
FS6400

Windows Server 2019

FS2500
FS3410
FS3600
FS6400

Windows Server 2022

FS2500
FS3410
FS3600
FS6400

Citrix Ready

FS2500
FS3410
FS3600
FS6400

OpenStack

FS2500
FS3410
FS3600
FS6400

General Specifications

Supported Protocols

FS2500	SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
FS3410	SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
FS3600	SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
FS6400	SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV

Supported Browsers

FS2500	Chrome Firefox Edge Safari
FS3410	Chrome Firefox Edge Safari
FS3600	Chrome Firefox Edge Safari
FS6400	Chrome Firefox Edge Safari

Supported Language

FS2500	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
FS3410	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
FS3600	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
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

Notes

FS2500	For an updated list of supported browser versions, check the DSM Technical Specifications.
FS3410	For an updated list of supported browser versions, check the DSM Technical Specifications.
FS3600	For an updated list of supported browser versions, check the DSM Technical Specifications.
FS6400	For an updated list of supported browser versions, check the DSM Technical Specifications.

Add-on Packages (view the complete package list)

Central Management System

FS2500
FS3410
FS3600
FS6400

Synology Chat

FS2500
FS3410
FS3600
FS6400

Maximum Number of Users

FS2500	300
FS3410	500
FS3600	600
FS6400	1,500

Notes

FS2500	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.
FS3410	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.
FS3600	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.
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.

SAN Manager

FS2500
FS3410
FS3600
FS6400

Maximum iSCSI Target Number

FS2500	64
FS3410	128
FS3600	256
FS6400	256

Maximum LUN

FS2500	128
FS3410	256
FS3600	512
FS6400	512

LUN Clone/Snapshot, Windows ODX

FS2500
FS3410
FS3600
FS6400

Synology MailPlus / MailPlus Server

FS2500
FS3410
FS3600
FS6400

Free Email Accounts

FS2500	5 (Additional accounts require purchase of licenses)
FS3410	5 (Additional accounts require purchase of licenses)
FS3600	5 (Additional accounts require purchase of licenses)
FS6400	5 (Additional accounts require purchase of licenses)

Maximum Number of Users

FS2500	1,600
FS3410	4,500
FS3600	5,800
FS6400	19,000

Notes

FS2500	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).
FS3410	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).
FS3600	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).
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).

Snapshot Replication

FS2500
FS3410
FS3600
FS6400

Maximum Snapshots per Shared Folder

FS2500	256
FS3410	512
FS3600	1,024
FS6400	1,024

Maximum of System Snapshots

FS2500	4,096
FS3410	16,384
FS3600	65,536
FS6400	65,536

Surveillance Station

FS2500
FS3410
FS3600
FS6400

Default Licenses

FS2500	2 (Additional cameras require purchase of licenses)
FS3410	2 (Additional cameras require purchase of licenses)
FS3600	2 (Additional cameras require purchase of licenses)
FS6400	2 (Additional cameras require purchase of licenses)

Suggested Maximum IP Cameras and Total FPS (H.264)

FS2500	1080p: 100 channels, 2800 FPS 3M: 100 channels, 1200 FPS 5M: 70 channels, 700 FPS 4K: 50 channels, 500 FPS
FS3410	1080p: 160 channels, 2800 FPS 3M: 160 channels, 1600 FPS 5M: 120 channels, 1200 FPS 4K: 80 channels, 800 FPS
FS3600	1080p: 160 channels, 3840 FPS 3M: 160 channels, 1600 FPS 5M: 120 channels, 1200 FPS 4K: 80 channels, 800 FPS
FS6400	1080p: 485 channels, 4850 FPS 3M: 450 channels, 4500 FPS 5M: 300 channels, 3000 FPS 4K: 220 channels, 2200 FPS

Suggested Maximum IP Cameras and Total FPS (H.265)

FS2500	1080p: 100 channels, 3000 FPS 3M: 100 channels, 2400 FPS 5M: 100 channels, 1300 FPS 4K: 80 channels, 800 FPS
FS3410	1080p: 200 channels, 6000 FPS 3M: 160 channels, 2800 FPS 5M: 160 channels, 1600 FPS 4K: 120 channels, 1200 FPS
FS3600	1080p: 200 channels, 6000 FPS 3M: 160 channels, 2800 FPS 5M: 160 channels, 1600 FPS 4K: 120 channels, 1200 FPS
FS6400	1080p: 520 channels, 15600 FPS 3M: 485 channels, 4850 FPS 5M: 450 channels, 4500 FPS 4K: 300 channels, 3000 FPS

Notes

FS2500	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.
FS3410	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.
FS3600	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.
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.

Synology Drive

FS2500
FS3410
FS3600
FS6400

Maximum Number of Users

FS2500	1,300
FS3410	3,900
FS3600	5,000
FS6400	20,500

Maximum Number of Hosted Files

FS2500	15,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
FS3410	25,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
FS3600	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)
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)

Notes

FS2500	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.
FS3410	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.
FS3600	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.
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.

Synology Office

FS2500
FS3410
FS3600
FS6400

Maximum Number of Users

FS2500	1,300
FS3410	3,700
FS3600	4,800
FS6400	16,200

Notes

FS2500	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
FS3410	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
FS3600	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
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

Virtual Machine Manager

FS2500
FS3410
FS3600
FS6400

Recommended Virtual Machine Instances

FS2500	8 (Learn more)
FS3410	16 (Learn more)
FS3600	24 (Learn more)
FS6400	32 (Learn more)

Recommended Virtual DSM Number (Licenses required)

FS2500	8 (including 1 Free License)
FS3410	16 (including 1 Free License)
FS3600	24 (including 1 Free License)
FS6400	32 (including 1 Free License)

Notes

FS2500	The specifications vary depending on system configuration and memory size.
FS3410	The specifications vary depending on system configuration and memory size.
FS3600	The specifications vary depending on system configuration and memory size.
FS6400	The specifications vary depending on system configuration and memory size.

VPN Server

FS2500
FS3410
FS3600
FS6400

Maximum Connections

FS2500	12
FS3410	32
FS3600	32
FS6400	32