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Synology FS6400 24-Bay 2U Flash Station [2 x Intel Xeon Silver 4110 8-Core, 32GB DDR4 ECC RDIMM, 24 x 2.5″ SAS/SATA SSD, Up To 48-Bay w/ RX1217sas x 2, Up To 72-Bay w/ FX2421 x 2, 2 x GbE RJ45, 2 x 10GbE RJ45, 2 x USB3.2 Gen1, 2 x Gen3 x8 Slots, Compatible w/ SAT5210 SSD]
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 FX24211
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. Learn more
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. Learn more
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.
See the white paper for more technical details regarding RAID F1
Compared with traditional RAID, RAID F1 distributes uneven workload to SSDs to prevent all drives from wearing out simultaneously.
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.2
Powered by Synology DiskStation Manager (DSM), Synology NAS offers advanced security measures to protect against sudden data loss and potential security holes. Learn more
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.
At Synology, we are committed to product innovation and quality. Synology guarantees a robust and reliable data management experience with a 5-year limited warranty, providing responsive technical support and hardware replacement services to maximize your return on investment.
Seamless transition between clustered servers in the event of a server failure to minimize the impact on applications.
Collaborate on documents, spreadsheets, and slides in real time to boost team productivity.
Secure, reliable, and private mail server solution with an intuitive and modern mail client.
Run various operating systems in isolated sandboxes. Seamlessly clone, store, and migrate virtual machines.
Shield your Synology NAS from the most sophisticated threats with industry-leading security solutions.
Schedulable and instantaneous data protection of shared folders and iSCSI LUNs for quick disaster recovery.
Engineered to handle high-intensity workloads, Synology hard drives consistently deliver top-grade performance.3
Flash volume deduplication is available on flash-only volumes comprised of compatible Synology SSD. Synology measured a data reduction ratio of over 3.15:1 based on 10 VMs configured for remote desktop with two operating systems and enterprise applications installed.
Storage drives are sold separately. Refer to the compatibility list for compatible devices.
DSM Specifications | ||
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| Maximum Single Volume Size |
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| Maximum Internal Volume Number | 256 | |
| SSD Read/Write Cache (Determining cache size) | ||
| SSD TRIM | ||
| RAID Group | ||
| Supported RAID Type |
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| RAID Migration |
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| Volume Expansion with Larger HDDs |
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| Volume Expansion by Adding a HDD |
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| Global Hot Spare Supported RAID Type |
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| Notes |
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| Internal Drives |
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| External Drives |
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| 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. | |
| File Protocol |
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| 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 |
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| Maximum Local User Accounts | 16,000 | |
| Maximum Local Groups | 512 | |
| Maximum Shared Folder | 512 | |
| Maximum Shared Folder Sync Tasks | 32 | |
| Maximum Hybrid Share Folders | 30 | |
| Folder and Package Backup | ||
| Entire System Backup | ||
| Notes | Full-system backup requires DSM 7.2 or later. | |
| Synology High Availability | ||
| Syslog Events per Second | 3,000 | |
Virtualization | VMware ESXi 6.5 and VAAI | |
| Windows Server 2016 | ||
| Windows Server 2019 | ||
| Windows Server 2022 | ||
| Citrix Ready | ||
| OpenStack | ||
| Supported Protocols | SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV | |
| Supported Browsers |
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| 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 | |
| Notes | For an updated list of supported browser versions, check the DSM Technical Specifications. | |
Add-on Packages view the complete package list | ||
Antivirus by McAfee (Trial) | ||
| Suggested Maximum Users | 6,000 | |
| Suggested Concurrent Users | 1,500 | |
| Notes | When applicable, systems are tested configured with maximum memory and set to allow the maximum number of connections. | |
| Maximum iSCSI Target Number | 256 | |
| Maximum LUN | 512 | |
| LUN Clone/Snapshot, Windows ODX | ||
| Notes | iSCSI Manager has been renamed to SAN Manager in DSM 7.0. | |
| Free Email Accounts | 5 (Additional accounts require purchase of licenses) | |
| Suggested Maximum Users | 17,500 | |
| Suggested Concurrent Users | 3,500 | |
| Maximum Server Performance | 5,721,000 emails per day, approx. 174GB | |
| Notes |
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| Maximum Snapshots per Shared Folder | 1,024 | |
| Maximum of System Snapshots | 65,536 | |
| Default Licenses | 2 (Additional cameras require purchase of licenses) | |
| Suggested Maximum IP Cameras and Total FPS (H.264) |
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| Suggested Maximum IP Cameras and Total FPS (H.265) |
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| Notes |
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| 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 |
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| Suggested Maximum Users | 16,250 | |
| Suggested Concurrent Users | 6,500 | |
| Notes |
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| 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. | |
| Maximum Connections | 60 | |
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 | ||
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 |
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Storage | Drive Bays | 24 |
| Maximum Drive Bays with Expansion Unit | 48 (RX1217sas x 2) / 72 (FX2421* x 2) | |
| Compatible Drive Type* (See all supported drives) |
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| Hot Swappable Drive* | ||
| 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. | |
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 3.2 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) |
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 |
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| 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) | |
| Notes |
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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 |
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Warranty | 5 Years | |
| Notes | The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) | |
Environment | RoHS Compliant | |
Packaging Content |
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Optional Accessories |
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| Notes |
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Network Storage
Network Storage
Network Storage
Network Storage
