Synology Expands All-Flash Enterprise Storage Lineup with 2U FS6420 and FS3420 NAS

Synology, Inc. announced the availability of the FS6420 and FS3420, 2 all-flash block and file storage systems built for latency-sensitive enterprise workloads.These systems offer significant improvements in IOs and throughput performance for on-premises virtualization, databases, and enterprise applications.

“More organizations than ever are running demanding on-premises workloads and need storage that can accommodate them.” says Jeffrey Huang, product manager, Synology. “The FS6420 and FS3420 deliver substantial IOPS improvements over their predecessors, boosting performance for latency-sensitive workloads. They’re strong options for a wide range of mid-size and large enterprises and colocation environments looking to implement enterprise applications and virtualization workloads.“

Enhanced enterprise performance and proven reliability
The FS6420 and FS3420 are powerful 24-bay, 2U rack-mounted systems that provide exceptional I/O responsiveness and significant performance gains over their predecessors. The FS6420 delivers over 929,000 read and 257,000 write IOs, representing 40% and 26% improvements, respectively⁽¹⁾. Similarly, the FS3420 achieves over 478,000 read and 169,000 write IOs, marking 21% and 32% increases in read and write performance. Both models offer over 60% higher SMB read throughput, making them for high-bandwidth file sharing.Beyond raw speed, both models provide flexible connectivity. They feature dual built-in 10GbE ports as standard, with the option to integrate 25GbE or Fibre Channel adapters for compatibility with high-speed network infrastructures ⁽²⁾.

Reliability is central to the design. Both units include redundant power supplies to eliminate single points of failure, while the integrated 10GbE networking supports failover and load balancing to ensure continuous uptime. Additionally, out-of-band management allows administrators to perform remote troubleshooting and access system logs even when the server is powered down.

Engineered for intensive workloads
Powered by Synology DiskStation Manager (DSM), the FS6420 and FS3420 bring the full strength of Synology’s software ecosystem to enterprise environments:

- Broad platform compatibility: Both systems are certified for use with VMware vSphere, Microsoft Hyper-V, Citrix, and OpenStack environments
- Built to handle demanding workflows: Fast networking combined with all-flash performance enables both systems to handle data- and network-intensive workloads, with multiple users accessing large files via SMB or NFS, such as video post-production or large-scale CAD projects

Intelligent storage tiering: Synology Tiering manages data across performance and capacity tiers to maximize storage efficiency.The FS6420 and FS3420 can serve as a high-performance hot tier, preserving flash capacity and IOs headroom for critical workloads
Built-in data protection: Back up unlimited virtual machines from physical servers with Active Backup for Business, while establishing near-instant recovery points and granular restores at the volume, folder, or file level with Snapshot Replication to meet RPO and RTO goals

Availability
The FS6420 and FS3420 are available from May 6, 2026, through the company’s network of partners and resellers worldwide.

⁽¹⁾Performance figures are obtained through internal testing by Synology. Actual performance may vary depending on the testing environment, usage, and configuration. See performance charts for more information
⁽²⁾For the complete and most up-to-date list of compatible NICs, HBAs, and other accessories, please check our compatibility list