24-bay 2.5'' SAS/SATA All-flash storage (up to 72-bay), 2xEight Core 2.1 GHz (turbo to 3.0GHz), 32GB RAM (up to 512GB), 2x10GbE Base T, Redundant power,...
24-bay 2.5'' SAS/SATA All-flash storage (up to 72-bay), 2xEight Core 2.1 GHz (turbo to 3.0GHz), 32GB RAM (up to 512GB), 2x10GbE Base T, Redundant power, SAS compatible. Blazingly-fast all-flash server aiming for I/O-intensive applications.
Synology FlashStation FS6400 is a 2U rackmount server designed for I/O-intensive and latency-sensitive tasks, ideal for multimedia post-production, virtual machines, online transaction processing, or database applications.
Dual Intel® Xeon® Silver 8-core with NUMA
DDR4 ECC RDIMM, up to 512GB
Over 240,000 iSCSI 4K random write IOPS
Up to 72 drives with FX2421
With multi-LAN design, FS6400 is capable of performing Link Aggregation and failover. For environments requiring a higher speed, two optional Ethernet add-in cards can be installed on PCIe 3.0 slots to provide fast data transmission.
Synology iSCSI storage supports most virtualization solutions such as VMware vSphere, Microsoft Hyper-V, Citrix Xen Server, and OpenStack Cinder to enhance work efficiency. You can run and manage multiple virtual machines on Windows, Linux, or DSM using Virtual Machine Manager.
The Btrfs file system introduces advanced storage technologies and optimized snapshots to prevent data corruption and reduce maintenance overheads. It offers flexible, efficient data protection and recovery tools while ensuring high-level data integrity.
Due to the peculiarities of SSD and RAID technology, a common challenge lies in how to prevent all of the drives from failing at the same time because of the evenly distributed workload. RAID F1 alleviates this problem with a specially designed algorithm to unevenly distribute workload to drives, enhancing the resilience of the storage pool and ensuring your data remains safe.
Remove duplicate data on all-flash arrays with volume-wide deduplication to greatly increase storage efficiency. Eliminate redundant data to save up to 65% in storage space use in applications like virtual desktop infrastructure, and virtual machine.
Powered by Synology DiskStation Manager (DSM), Synology NAS offers advanced security measures to protect against sudden data loss and potential security holes.
Analyze system settings, password strength and network preferences, and remove any possible malware.
A kernel-level enhancement that blocks malicious programs from accessing unauthorized system resources.
Encrypt shared folders and network data transmission to avoid unauthorized data access.
Prevent others from logging in to your DSM by generating a six-digit one-time password (OTP) on your mobile device.
| Hardware Specifications | |
| CPU | |
| CPU Model | Intel Xeon Silver 4110 |
| CPU Quantity | 2 |
| CPU Architecture | 64-bit |
| CPU Frequency | 8-core 2.1 (base) / 3.0 (turbo) GHz |
| Hardware Encryption Engine (AES-NI) | ✔ |
| Memory | |
| System Memory | 32 GB DDR4 ECC RDIMM |
| Memory Module Pre-installed | 32 GB (16 GB x 2) |
| Total Memory Slots | 16 |
| Maximum Memory Capacity | 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 x 2) / 72 (FX2421* x 2) |
| SAS multipathing | |
| Compatible Drive Type* (See all supported drives) | 2.5" SAS HDD |
| 2.5" SAS SSD | |
| 2.5" SATA SSD | |
| Hot Swappable Drive* | ✔ |
| External Ports | |
| RJ-45 1GbE LAN Port | 2 (with Link Aggregation / Failover support) |
| RJ-45 1GbE LAN Port* | |
| RJ-45 10GbE LAN Port | 2 (with Link Aggregation / Failover support) |
| Out-of-Band Management LAN Port | |
| Max. number of LAN ports | |
| USB 3.2 Gen 1 Port* | 2 |
| Expansion Port | 1 |
| Notes | The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019. |
| PCIe | |
| PCIe Expansion | 2 x Gen3 x8 slots (x8 link) |
| File System | |
| Internal Drives | Btrfs |
| EXT4 | |
| External Drives | Btrfs |
| EXT4 | |
| EXT3 | |
| FAT | |
| NTFS | |
| HFS+ | |
| exFAT | |
| Notes | exFAT Access can be installed for free from Package Center in DSM 7.0. In DSM 6.2 or earlier versions, exFAT Access needs to be purchased 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 - RKS-02) |
| 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 | ✔ |
| Power Recovery | ✔ |
| Noise Level* | 53.7 dB(A) |
| Scheduled Power On / Off | ✔ |
| Wake on LAN / WAN | ✔ |
| Power Supply Unit / Adapter | 800 W |
| Redundant Power Supply | ✔ |
| AC Input Power Voltage | 100V to 240V 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) | |
| 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 | FCC |
| CE | |
| BSMI | |
| EAC | |
| KC | |
| VCCI | |
| RCM | |
| Warranty | 5 Years |
| Environment | RoHS Compliant |
| Packaging Content | Main Unit X 1 |
| Accessory Pack X 1 | |
| AC Power Cord X 2 | |
| Quick Installation Guide X 1 | |
| Optional Accessories | DDR4 ECC RDIMM: D4RD-2666-16G*/D4RD-2666-32G |
| Expansion Units: FX2421*/RX1217sas | |
| 2.5" SATA SSD: SAT5210 | |
| 25GbE Network Interface Card: E25G21-F2 | |
| 10GbE Network Interface Card: E10G21-F2/E10G18-T2/E10G18-T1 | |
| Rail Kit Sliding: RKS-02 | |
| Surveillance Device License Pack | |
| DSM Specifications | |
| Storage Management | |
| Maximum Single Volume Size* | 1 PB (64 GB memory required, for RAID 6 groups only) |
| 200 TB | |
| Maximum Internal Volume Number | 256 |
| SSD Read / Write Cache (White Paper) | ✔ |
| SSD TRIM | ✔ |
| RAID Group | ✔ |
| Supported RAID Type | RAID F1 |
| Basic | |
| JBOD | |
| RAID 0 | |
| RAID 1 | |
| RAID 5 | |
| RAID 6 | |
| RAID 10 | |
| RAID Migration | Basic to RAID 1 |
| Basic to RAID 5 | |
| RAID 1 to RAID 5 | |
| 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 | |
| Notes | Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and the amount of system metadata stored. |
| 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. | |
| File Services | |
| File Protocol | SMB/AFP/NFS/FTP/WebDAV |
| Maximum Concurrent SMB/AFP/FTP Connections | 8,000 |
| Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion) | 10,000 |
| Windows Access Control List (ACL) Integration | ✔ |
| NFS Kerberos Authentication | ✔ |
| Notes | Regarding data concerning tests with RAM expansion, all memory slots are installed with the maximum capacity of supported RAM. |
| Account & Shared Folder | |
| Maximum Local User Accounts | 16,000 |
| Maximum Local Groups | 512 |
| Maximum Shared Folder | 512 |
| Maximum Shared Folder Sync Tasks | 32 |
| Hybrid Share | |
| Maximum Hybrid Share Folders | 30 |
| Hyper Backup | |
| Folder and Package Backup | ✔ |
| Entire System Backup | ✔ |
| Notes | Full-system backup requires DSM 7.2 or later. |
| High Availability | |
| Synology High Availability | ✔ |
| Log Center | ✔ |
| Syslog Events per Second | 3,000 |
| Virtualization | |
| VMware vSphere with VAAI | ✔ |
| Windows Server 2016 | ✔ |
| Windows Server 2019 | ✔ |
| Windows Server 2022 | ✔ |
| Citrix Ready | ✔ |
| OpenStack | ✔ |
| General Specifications | |
| Networking Protocols | SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV |
| Supported Browsers | Google Chrome |
| Firefox | |
| Microsoft 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 |
| Add-on Packages view the complete package list | |
| Antivirus by McAfee (Trial) | ✔ |
| Central Management System | ✔ |
| Synology Chat | ✔ |
| Maximum Users | 6,000 |
| Maximum Number of Concurrent Users | 1,500 |
| Document Viewer | |
| SAN Manager | |
| Maximum iSCSI Target Number | 256 |
| Maximum LUN | 512 |
| LUN Clone/Snapshot, Windows ODX | |
| 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 |
| Snapshot Replication | ✔ |
| Maximum Snapshots per Shared Folder | 1,024 |
| Maximum of System Snapshots | 65,536 |
| Surveillance Station | ✔ |
| Maximum IP cam (Licenses required) | 150 (including 2 Free License) (see all supported IP cameras) |
| Total FPS (H.264) | 4500 FPS @ 720p (1280x720) |
| 4500 FPS @ 1080p (1920x1080) | |
| 4500 FPS @ 3M (2048x1536) | |
| 3300 FPS @ 5M (2591x1944) | |
| 2100 FPS @ 4K (3840x2160) | |
| Total FPS (H.265) | 4500 FPS @ 720p (1280x720) |
| 4500 FPS @ 1080p (1920x1080) | |
| 4500 FPS @ 3M (2048x1536) | |
| 4500 FPS @ 5M (2591x1944) | |
| 4500 FPS @ 4K (3840x2160) | |
| Synology Drive | ✔ |
| Recommended Number of Concurrent Sync Clients | 2,000 (the number of connections that can be maintained when the recommended number of hosted files was reached) |
| Recommended Number of Hosted Files | 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 | Exceeding the recommended numbers above will not block application operations, but may result in longer response time. |
| Utilizing SSD cache can significantly improve performance. | |
| For tested models with expandable memory, the maximum amount of RAM was installed. | |
| Btrfs file system and non-encrypted shared folders were used during the aforementioned testing. | |
| Synology Office | ✔ |
| Maximum Users | 3,400 |
| Notes | Multiple files were opened for testing and each file was edited by 30 users simultaneously. |
| For tested models with expandable memory, the maximum amount of RAM was installed. | |
| Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM | |
| Virtual Machine Manager | ✔ |
| Recommended Virtual Machine Instances | 32 |
| 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 | 60 |
