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Synology FlashStation FS6420 24-Bay NAS Enclosure, Diskless

SKU: SYNFS6420 MFR: FS6420
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Review Summary

Synology FlashStation FS6420 Specifications

Hardware: CPU

Hardware: CPU

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  • CPU Model

    AMD EPYC 7303

  • CPU Quantity

    1

  • CPU Cores

    16

  • CPU Threads

    32

  • CPU Architecture

    64-bit

  • CPU Frequency

    2.4 (base) / 3.4 (turbo) GHz

  • Hardware Encryption Engine

    Yes

Hardware: Memory

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  • System Memory

    64GB DDR4 ECC RDIMM

  • Memory Module Pre-installed

    64GB (64GB x1)

  • Total Memory Slots

    16

  • Maximum Memory Capacity

    1024GB (64GB x16)

Hardware: Storage

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  • Drive Bays (See all supported drives)

    24x 2.5" SATA SSD

  • Hot Swappable Drive

    Yes

Hardware: External Ports

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  • RJ-45 10GbE LAN Port

    2

  • Out-of-Band Management LAN Port

    1

  • USB 3.2 Gen 1 Port

    2

Hardware: PCIe

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  • PCIe Expansion

    2x Gen4 x16 slot (x16 link)

Hardware: General

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  • System Fan

    4x 3.14 x 3.14" (80 x 80mm)

  • Fan Speed Mode

    Full-Speed Mode
    Cool Mode
    Quiet Mode

  • Easy Replacement System Fan

    Yes

  • Power Recovery

    Yes

  • Noise Level

    53.0 dB(A)

  • Scheduled Power On / Off

    Yes

  • Wake on LAN / WAN

    Yes

  • Power Supply Unit / Adapter

    550 watts

  • Redundant Power Supply

    Yes

  • AC Input Power Voltage

    100V to 240V AC

  • Power Frequency

    50/60 Hz, Single Phase

  • Power Consumption

    164.74 watts (Access)

  • British Thermal Unit

    561.76 BTU/hr (Access)

Hardware: Temperature

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  • Operating Temperature

    32 to 95 Degree F (0 to 35 Degree C)

  • Storage Temperature

    -20 Degree C to 60 Degree C (-5 Degree F to 140 Degree F)

  • Operating Humidity

    8% to 80% RH

  • Storage Humidity

    5% to 95% RH

Hardware: Certification

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  • Certification

    FCC
    CE
    BSMI
    VCCI
    RCM
    UKCA
    EAC
    CCC
    KC
    BIS
    UL

Hardware: Environment

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  • Environment

    RoHS Compliant

Hardware: Physical

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  • Form Factor (RU)

    2U

  • Rack Installation Support

    4-post 19" rack (Synology Rail Kit - RKS-02)

  • Dimensions (H x W x D)

    3.46 x 18.98 x 28.5" (88 x 482 x 724mm)

  • Weight

    34.17 lbs (15.5kg)

Software: Storage Management

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  • Maximum Single Volume Size

    1 PB (for RAID 6 groups only)
    200 TB
    108 TB

  • Maximum Internal Volume Number

    32

  • SSD Read/Write Cache

    Yes

  • SSD TRIM

    Yes

  • Storage Efficiency

    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

Software: File System

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  • Internal Drives

    Btrfs

  • External Drives

    Btrfs
    ext4
    ext3
    FAT32
    NTFS
    HFS+
    exFAT

Software: File Services

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  • File Protocol

    SMB
    AFP
    NFS
    FTP
    WebDAV
    Rsync

  • Maximum Number of SMB Connections

    10,000 (FSCT-Based)

  • Windows Access Control List Integration

    Yes

  • NFS Kerberos Authentication

    Yes

Software: Account & Shared Folder

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  • Maximum Local User Accounts

    15360

  • Maximum Local Groups

    512

  • Maximum Shared Folder

    512

  • Maximum Shared Folder Sync Tasks

    32

Software: Hybrid Share

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  • Hybrid Share Folder Number

    30

Software: Hyper Backup

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  • Data & Folder Backup

    Yes

  • Entire System Backup

    Yes

Software: High Availability

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  • Synology High Availability

    Yes

Software: Log Center

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  • Syslog Events per Second

    3000

Software: Virtualization

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  • VMware vSphere

    ESXi 8.0 U2, ESXi 8.0 U1, ESXi 8.0, ESXi 7.0 U3, ESXi 7.0 U2, ESXi 7.0 U1, ESXi 7.0, ESXi 6.7 U3, ESXi 6.7 U2, ESXi 6.7 U1, ESXi 6.7, ESXi 6.5 U3, ESXi 6.5 U2, ESXi 6.5 U1, ESXi 6.5

  • Microsoft Hyper-V

    Windows Server 2025

  • Citrix XenServer

    XenServer 8.4, XenServer 8, Citrix Hypervisor 8.2 LTSR CU1

  • OpenStack

    Cinder

Software: General

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  • Supported Protocols

    SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV

  • Supported Browsers

    Chrome
    Firefox
    Edge
    Safari

  • Supported Language

    English, German, French, Italian, Spanish, Danish, Norwegian, Swedish, Dutch, Russian, Polish, Hungarian, Brazilian Portuguese, European Portuguese, Turkish, Czech, Thai, Japanese, Korean, Traditional Chinese, Simplified Chinese

  • UPC Code

    846504006410

About Synology FlashStation FS6420

Accelerate your essential workloads
FS6420 delivers the performance and reliability you need to accelerate your demanding workloads and data services.

Built for high reliability

Out-of-band (OOB) management
Simplify troubleshooting by managing powered-down devices remotely and accessing critical logs through a dedicated interface.

Redundant power
Redundant power supplies ensure maximum server uptime by preventing single-point power failures.

Failover cluster
Maximize service continuity by pairing two identical units into a Synology High Availability cluster, ensuring automated, minute-level failover in the event of hardware failure.

Flexible, high-performance network connectivity
The FS6420 supports a wide range of networking interfaces, protocols, and configurations for seamless integration into enterprise environments.

Built-in fast connectivity
Two 10GbE RJ-45 ports provide excellent networking performance right out of the box. Flexible networking options
Improve I/O performance or add redundancy with optional 10GbE or 25GbE SFP+/SFP28 and 10GbE Ethernet NICs, or Fibre Channel HBAs.

Failover and network balancing
Bond multiple network interfaces with Link aggregation to enable automatic network failover and load balancing.

Storage efficiency

Automated storage tiering
Synology Tiering automatically moves infrequently accessed data from the FS6420 to cost-efficient tiers, balancing performance and capacity to maximize storage ROI. Flexible tiering policies, broad target support, and clear visibility into data usage help you adapt quickly to changing business needs.

Flash volume deduplication
Volume-wide deduplication on all-flash arrays removes redundant data, boosting storage efficiency by up to 65% for virtual desktops and virtual machines.

VM Block & File Storage

Certified virtualization support
Deploy and manage storage operations in various virtualization environments with certified support for VMware vSphere, Microsoft Hyper-V, and Citrix XenServer.

Block storage for Kubernetes
The Synology CSI Driver for Kubernetes enables seamless provisioning and management of persistent volumes. It supports snapshots via Kubernetes native APIs and multiple access protocols, providing scalable, secure, and reliable block storage for stateful Kubernetes workloads.

Container & VM hosting
Container Manager enables easy deployment and management of Docker-based containers on Synology systems, providing scalability and simplified management for thousands of apps. For full virtualization, Virtual Machine Manager (VMM) enables Windows, Linux, and DSM environments to run as isolated, flexible virtual machines, giving businesses the freedom to test, develop, and run diverse workloads securely on a single Synology system.

Collaboration in a secure cloud, assisted by AI
Enhance workplace collaboration with Synology Office Suite. Create, edit, and share documents across teams in real time. Host an on-premises mail server to provide web-based email access while maintaining full data ownership. Additionally, stay connected through secure one-on-one chats, public channels, encrypted private channels, and group conversations. AI assistance enhances productivity across apps, with support for leading AI providers via API key integration.

Work smarter with AI
An all-in-one private cloud productivity AI solution with smart tools and privacy controls.

Intuitive storage for on-site and remote teams
Provide secure and convenient cross-platform tile access, sharing, and synchronization across multiple locations.

A secure private cloud solution for enterprise collaboration

A private cloud suite for file sharing
Empower your entire organization with streamlined access, sharing, and syncing of data from any location. Establish granular control over file and folder access and sharing permissions. Maintain a comprehensive audit trail of file activities and track changes to file share settings with detailed records.

Multi-platform support
Access personal and shared data from mobile apps, desktop clients, web browsers, or another Synology system. Any changes you make are automatically synced to other devices as soon as they are connected.

Efficient multi-site synchronization

Cloud-powered multi-site syncing
Empower global workflows with high-speed access to data from anywhere in your network. Our hybrid cloud solution caches frequently used files locally for rapid access, while less frequently accessed data is stored in the cloud, reducing your on-site storage requirements.

NAS-to-NAS synchronization
Automate site-to-site data synchronization for better team workflows. Options for one-way or two-way syncing keep files and folders up-to-date across every data site.

Sync to public cloud providers
Connect seamlessly to public cloud services including Amazon S3, BackBlaze B2, Dropbox, Google Cloud Storage, Microsoft Azure, and OpenStack Swift. Multiple protocol support, client-side encryption, and customizable sync and bandwidth controls enable efficient storage management across various platforms.

Comprehensive backup solutions

Endpoint, VM, and NAS/SAN protection
Securely back up a wide range of systems including Windows, Mac, and Linux endpoints, VMware and Hyper-V virtual machines, and Synology servers. Expand protection to physical servers running Windows or Linux, as well as storage solutions such as Nutanix Files, NetApp ONTAP, and Windows Server with VSS (Volume Shadow Copy Service). Built-in deduplication technology optimizes storage efficiency, while multi-versioning capabilities provide flexible restoration options.

Microsoft 365 and Google Workspace
Centralize backups of Microsoft 365 and Google Workspace data to protect cloud data from accidents and simplify compliance with data retention policies. Schedulable backups, flexible file versioning, and block-level deduplication ensure flexibility and storage and bandwidth savings.

Advanced data protection and recovery

Efficient and reliable Synology system backup
Back up entire systems or all data, applications, and configurations to a wide range of storage destinations, including Synology C2 Storage. In case of data loss, quickly restore complete systems through bare-metal recovery or retrieve individual files as needed. Advanced features including automated scheduling, granular access controls, end-to-end encryption, data deduplication, and multi-version retention empower you to create the optimal backup plan for your data deployment.

Tamper-proof protection with immutable snapshots
Safeguard critical LUNs and shared folders with automated immutable snapshots backed by custom retention policies. Built-in support for offsite replication further ensures robust business continuity.

Centralized monitoring and management
Monitor and manage your Synology fleet from a central interface, on-prem or in the cloud.

Central Management System
Manage Synology servers from a central console using group policies, task delegation, batch updates, and more.

Active Insight
Monitor your global Synology fleet's performance, backup status, login activity, and more with the power of the cloud.

Backed by Synology drives
Leverage high sustained performance and reliability with enterprise-grade drives designed specifically for Synology systems. Take advantage of advanced features such as volume-wide data deduplication, lifetime analytics, and seamless firmware upgrades.

Hard drives designed for Synology
See how Synology hard drives deliver reliability, consistent performance, and simplified system management through deep hardware-software integration.

Synology FlashStation FS6420 Features

  • Fast and reliable: Over 257,000 random write IOPS2, built-in dual-port 10GbE, and up to 168 TB raw storage
  • Flexible configuration: Supports additional 10/25GbE ports, Fibre Channel adapters, and up to 1,024 GB of memory
  • Versatile business application platform: Enhance productivity with collaboration tools and run containerized or virtualized workloads

Warranty Information

This product has a limited warranty of 60 months.

What's in the box:

  • Synology FlashStation FS6420 24-Bay NAS Enclosure (Diskless)
  • Accessory Pack
  • 2x C13 to C14 Power Cord
  • Front Cover
  • Synology 5 Year Limited Warranty