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Specifications |
| Product Code | Synology FS6400 |
| CPU |
| CPU Model | Intel Xeon Silver 4110 x 2 |
| CPU Architecture | 64-bit |
| CPU Frequency | 8-Core 2.1 (base) / 3.0 (turbo) GHz |
| Hardware Encryption Engine (AES-NI) | Yes |
| Memory |
| System Memory | 32 GB DDR4 ECC RDIMM |
| Memory Module Pre-installed | 32 GB (16 GB x 2) |
| Total Memory Slots | 16 |
| Memory Expandable up to | 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. |
| Storage |
| Drive Bays | 24 |
| Maximum Drive Bays with Expansion Unit | 48 (RX1217sas) / 72 (RX2417sas) |
| Compatible Drive Type | 2.5" SAS HDD |
| 2.5" SAS SSD |
| 2.5" SATA SSD |
| Maximum Internal Raw Capacity | 184.32 TB (7.68 TB drive x 24) (Capacity may vary by RAID types) |
| Maximum Raw Capacity with Expansion Units | 568.32 TB (184.32 TB + 16 TB drive x 24) (Capacity may vary by RAID types) |
| Maximum Single Volume Size | 200 TB (for RAID 5 or RAID 6 groups only) |
| 108 TB |
| Hot Swappable Drive | Yes |
| Notes | "Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay. |
| The maximum raw capacity is not limited by the maximum single volume size. Synology NAS models may utilize capacities over the maximum single volume size as long as each volume created is below the limit. (Learn more) |
| Each internal volume (may consist of multiple drives) is expandable up to 200TB. |
| External Ports |
| RJ-45 1GbE LAN Port | 2 (with Link Aggregation / Failover support) |
| RJ-45 10GbE LAN Port | 2 (with Link Aggregation / Failover support) |
| USB 3.0 Port | 2 |
| Expansion Port | 1 |
| PCIe |
| PCIe Expansion | 2 x Gen3 x8 slots (x8 link) |
| Add-In-Card Support | PCIe Network Interface Card |
| File System |
| Internal Drives | Btrfs |
| EXT4 |
| External Drives | Btrfs |
| EXT4 |
| EXT3 |
| FAT |
| NTFS |
| HFS+ |
| exFAT |
| Notes | exFAT Access is purchased separately in Package Center. |
| Appearance |
| Form Factor (RU) | 2U |
| Size (Height x Width x Depth) | 88 mm x 482 mm x 724 mm |
| Weight | 17.26 kg |
| Rack Installation Support | 4-post 19" rack (Synology Rail Kit - RKS1317) |
| Notes | The rail kit is sold separately |
| Others |
| System Fan | 80 mm x 80 mm x 4 pcs |
| Fan Speed Mode | Full-Speed Mode |
| Cool Mode |
| Quiet Mode |
| Easy Replacement System Fan | Yes |
| Power Recovery | Yes |
| Noise Level | 53.7 dB(A) |
| Scheduled Power On / Off | Yes |
| Wake on LAN / WAN | Yes |
| Power Supply Unit / Adapter | 800 W |
| Redundant Power Supply | Yes |
| AC Input Power Voltage | 100 V to 240 V AC |
| Power Frequency | 50/60 Hz, Single Phase |
| Power Consumption | 288.49 W (Access) |
| 145.8 W (HDD Hibernation) |
| British Thermal Unit | 984.37 BTU/hr (Access) |
| 497.49 BTU/hr (HDD Hibernation) |
| Notes | 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% |
| Temperature |
| Operating Temperature | 0°C to 35°C (32°F to 95°F) |
| Storage Temperature | -20°C to 60°C (-5°F to 140°F) |
| Relative Humidity | 5% to 95% RH |
| Certification |
| Environment |
| Storage Management |
| Maximum Internal Volume Number | 256 |
| Maximum iSCSI Target Number | 256 |
| Maximum iSCSI LUN | 512 |
| iSCSI LUN Clone/Snapshot, Windows ODX | Yes |
| SSD Read / Write Cache (White Paper) | Yes |
| SSD TRIM | Yes |
| RAID Group | Yes |
| Supported RAID Type | RAID F1 |
| Basic |
| JBOD |
| RAID 0 |
| RAID 1 |
| RAID 5 |
| RAID 6 |
| RAID 10 |
| RAID Migration | Basic to RAID 1 |
| Basic to RAID 5 |
| RAID 1 to RAID 5 |
| RAID 5 to RAID 6 |
| Volume Expansion with Larger HDDs | RAID F1 |
| RAID 1 |
| RAID 5 |
| RAID 6 |
| RAID 10 |
| Volume Expansion by Adding a HDD | RAID F1 |
| JBOD |
| RAID 5 |
| RAID 6 |
| Global Hot Spare Supported RAID Type | RAID F1 |
| RAID 1 |
| RAID 5 |
| RAID 6 |
| RAID 10 |
| File Services |
| File Protocol | CIFS/AFP/NFS/FTP/WebDAV |
| Maximum Concurrent CIFS/AFP/FTP Connections | 8, 000 |
| Maximum Concurrent CIFS/AFP/FTP Connections (with RAM expansion) | 10, 000 |
| Windows Access Control List (ACL) Integration | Yes |
| NFS Kerberos Authentication | Yes |
| Account & Shared Folder |
| Maximum Local User Accounts | 16, 000 |
| Maximum Local Groups | 512 |
| Maximum Shared Folder | 512 |
| Maximum Shared Folder Sync Tasks | 32 |
| High Availability |
| Synology High Availability | Yes |
| Log Center |
| Syslog Events per Second | 3, 000 |
| Virtualization |
| VMware vSphere 6 with VAAI | Yes |
| Windows Server 2016 | Yes |
| Citrix Ready | Yes |
| OpenStack | Yes |
| General Specifications |
| Networking Protocols | SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV |
| Supported Browsers | Chrome |
| Firefox |
| Edge |
| Internet Explorer 10 onwards |
| Safari 10 onwards |
| Safari (iOS 10 onwards) |
| Chrome (Android 6.0 onwards) |
| Supported Language | English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands and More |
| Add-on Packages |
| Antivirus by McAfee (Trial) | Yes |
| Central Management System | Yes |
| Synology Chat |
| Maximum Users | 6, 000 |
| Notes | The number of concurrent HTTP connections for Synology Chat was configured to the maximum. |
| CPU and RAM usage were both under 80% when the number of maximum users was reached. |
| For tested models with expandable memory, the maximum amount of RAM was installed. |
| Document Viewer |
| Document Viewer | Yes |
| exFAT Access (Optional) |
| exFAT Access (Optional) | Yes |
| Synology MailPlus / MailPlus Server |
| Free Email Accounts | 5 (Licenses required for additional accounts) |
| Maximum Number of Concurrent Users | 2, 200 |
| Maximum Server Performance | 5,721,000 emails per day, approx. 174GB |
| Notes | The CPU and RAM usage were both under 80% when testing the maximum number of concurrent users. |
| For tested models with expandable memory, the maximum amount of RAM was installed. |
| The performance of the mail system will slightly decrease in high-availability mode due to data synchronization between the two servers. |
| Functions that were enabled in all of the tests above: anti-spam, anti-virus, DNSBL, greylist, content scan, full-text search (English only). |
| Snapshot Replication |
| Maximum Snapshots per Shared Folder | 1, 024 |
| Maximum of System Snapshots | 65, 536 |
| Surveillance Station |
| Maximum IP cam (Licenses required) | 128 (including 2 Free License) (See All Supported IP Cameras) |
| Total FPS (H.264) | 3840 FPS @ 720p (1280x720) |
| 3456 FPS @ 1080p (1920x1080) |
| 1664 FPS @ 3M (2048x1536) |
| 970 FPS @ 5M (2591x1944) |
| 690 FPS @ 4K (3840x2160) |
| Total FPS (H.265) | 3840 FPS @ 720p (1280x720) |
| 3840 FPS @ 1080p (1920x1080) |
| 3072 FPS @ 3M (2048x1536) |
| 1792 FPS @ 5M (2591x1944) |
| 1140 FPS @ 4K (3840x2160) |
| Total FPS (MJPEG) | 1260 FPS @ 720p (1280x720) |
| 770 FPS @ 1080p (1920x1080) |
| 560 FPS @ 3M (2048x1536) |
| 400 FPS @ 5M (2591x1944) |
| Notes | Surveillance Station throughput is tested with Axis network camera, using continuous recording with live view from Surveillance Station and motion detection by camera. Live view and recording are sharing the same stream from the camera. |
| Total FPS may be affected by other services running at the same time (e.g., archive tasks performed by Archive Vault). |
| Synology Drive |
| Recommended Number of Hosted Files | 5,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above) |
| Recommended Number of Concurrent Sync Clients | 2,000 (the number of connections that can be maintained when the recommended number of hosted files was reached) |
| Notes | For tested models with expandable memory, the maximum amount of RAM was installed. |
| Exceeding the limits above may result in longer response time in file operations. |
| Btrfs file system and non-encrypted shared folders were used during the aforementioned testing. |
| Synology Office |
| Maximum Users | 3, 400 |
| Notes | Multiple files were opened for testing and each file was edited by 30 users simultaneously. |
| CPU and RAM usage were both under 80% when the number of maximum users was reached. |
| For tested models with expandable memory, the maximum amount of RAM was installed. |
| Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM |
| Virtual Machine Manager |
| Recommended Virtual Machine Instances | 32 (Learn more) |
| Recommended Virtual DSM Number (Licenses required) | 32 (including 1 Free License) |
| Notes | The specifications vary depending on system configuration and memory size. |
| VPN Server |
| Maximum Connections | 40 |
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