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Silver 2U rackmount chassis with twenty-four 2.5-inch drive bays and dual Xeon processors

Synology Inc.

Synology Inc. FS6400 24-bay rackmount NAS dual Xeon Silver 4110 32GB DDR4

SKU CH-TGRY-1J74S MPN FS6400

24-bay rackmount NAS with dual Xeon Silver 4110 processors, 32GB DDR4 ECC memory, two 10 GbE and two 1 GbE ports, holding 2.5-inch SAS or SATA drives

  • Port RJ-452 x 10 GbE RJ-45 (10GBASE-T) 2 x 1 GbE RJ-45
  • Port USB2 x USB3.0
  • HDD Interface24 x 2.5" SAS SSD / HDD or SATA SSD (drives not included)
  • Form Factor24-bay
  • Processor2 x Intel Xeon Silver 4110 8-core 2.1 GHz, Turbo Boost up to
  • Installed Memory32GB DDR4 ECC RDIMM (2 x 16GB), Expandable up to 512GB (16 x

Form Factor 24-bay

Installed Memory 32GB DDR4

Model FS6400

  • 24 drive bays support SAS and SATA SSDs for high-density flash storage
  • Dual Xeon Silver 4110 processors with 16 cores total deliver compute power for virtualization
  • 32 GB DDR4 ECC memory installed, expandable to 512 GB for large workloads
  • Two 10 GbE RJ-45 ports provide high-throughput network connectivity
  • Over 240,000 iSCSI 4K random write IOPS ensure low-latency performance

Purpose-built flash storage server

The Synology FS6400 is a 24-bay 2U rackmount NAS designed for I/O-intensive and latency-sensitive workloads. It ships diskless and accepts 2.5-inch SAS or SATA SSDs to build all-flash arrays. Dual Xeon Silver 4110 processors and 32GB DDR4 ECC memory provide the compute foundation for virtualisation, databases and post-production pipelines.

Sustained throughput and latency

Two 10 GbE RJ-45 ports and two 1 GbE RJ-45 ports support link aggregation and failover for continuous bandwidth under heavy concurrent access. The platform delivers over 240000 iSCSI 4K random write IOPS, maintaining low latency during prolonged database or virtual-machine operations. Two PCIe 3.0 slots allow optional network upgrades without interrupting service.

Thermal envelope and power profile

The unit operates reliably between 0 and 35 degrees Celsius with humidity from 5 to 95 percent RH. Redundant AC power supplies accept 100 to 240V at 47 to 63Hz single phase, enabling deployment in standard data-centre racks. The 3.46-inch height fits a 2U slot while the 38.05 lb chassis remains stable on sliding rails.

Highlights

  • 24 drive bays support SAS and SATA SSDs for high-density flash storage
  • Dual Xeon Silver 4110 processors with 16 cores total deliver compute power for virtualization
  • 32 GB DDR4 ECC memory installed, expandable to 512 GB for large workloads
  • Two 10 GbE RJ-45 ports provide high-throughput network connectivity
  • Over 240,000 iSCSI 4K random write IOPS ensure low-latency performance

Specifications

BrandSynology
ModelFS6400
Port RJ-452 x 10 GbE RJ-45 (10GBASE-T)
2 x 1 GbE RJ-45
Port USB2 x USB3.0
HDD Interface24 x 2.5" SAS SSD / HDD or SATA SSD (drives not included)
Form Factor24-bay
Processor2 x Intel Xeon Silver 4110 8-core 2.1 GHz, Turbo Boost up to 3.0 GHz
Installed Memory32GB DDR4 ECC RDIMM (2 x 16GB), Expandable up to 512GB (16 x 32GB)
Included HDD CapacityDiskless System
Supported ProtocolsSMB, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP, VPN (PPTP, OpenVPN, L2TP)
PowerAC input power voltage: 100V to 240V AC
Power frequency: 47 to 63Hz, single phase
FeaturesSynology all-flash server targeted at I/O-intensive and latency-sensitive applications
Over 240,000 iSCSI 4K Random Write IOPS, ultra-high performance with low latency
Dual Intel Xeon Silver 8-core processors and 32GB DDR4 ECC RDIMM, expandable up to 512GB
Onboard 10GBASE-T ports, capable of installing optional 10 GbE / 25 GbE / 40 GbE NICs
Complete virtualization solution for VMware vSphere, Windows Server Hyper-V, Citrix XenServer, and OpenStack Cinder
Advanced Btrfs file system offering 65,000 system-wide snapshots and 1,024 snapshots per shared folder
Scale up to 72 drives with 2
TemperatureOperating Temperature: 0 ~ 35 degree Celsius (32 ~ 95 degree Fahrenheit)
Storage Temperature: -20 ~ 60 degree Celsius (-5 ~ 140 degree Fahrenheit)
Humidity5% to 95% RH
Dimensions3.46" x 16.95" x 27.24"
3.46" x 18.98" x 28.50" (with server ears)
Weight38.05 lbs.
Package Contents1 x FS6400 main unit
1 x Quick Installation Guide
1 x Accessory pack
2 x AC power cord
Shipping weight23.72 kg
Package size914 × 686 × 254 mm

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Questions about this item

How much heat and noise does the FS6400 produce when running 24/7 at 35 °C ambient?

The unit is rated for continuous operation up to 35 °C with dual Xeon Silver 4110 processors and redundant power supplies; fan speed scales with load, so a fully populated 24-bay chassis will run louder and warmer than a half-filled one.

Which drives and memory modules must I supply to make the FS6400 operational?

You need 2.5" SAS or SATA SSDs or HDDs for the 24 front bays and DDR4 ECC RDIMMs if you want to expand beyond the installed 32 GB (2 × 16 GB) up to 512 GB.

Can the FS6400's 10 GbE and 1 GbE ports connect directly to my existing Cat 5e patch panel and older gigabit switches?

Yes, the two 10GBASE-T RJ-45 ports auto-negotiate down to 1 GbE or 100 MbE, and the two dedicated 1 GbE RJ-45 ports work with any standard Ethernet cable and legacy switch.

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