Synology FX2421 24-Bay FlashStation Expansion Unit
Synology FX2421 24-Bay FlashStation Expansion Unit
Synology FX2421 24-Bay FlashStation Expansion Unit
Synology FX2421 24-Bay FlashStation Expansion Unit
Synology FX2421 24-Bay FlashStation Expansion Unit
Synology FX2421 24-Bay FlashStation Expansion Unit

Synology

Synology FX2421 24-Bay FlashStation Expansion Unit

SKU: Synology FX2421

R 77,999.00

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Synology FX2421 24-Bay FlashStation Expansion Unit

R 77,999.00

R 77,999.00

At a Glance

  • Adds 24 additional 2.5-inch drive bays
  • Designed specifically for compatible Synology FlashStation systems
  • Supports compatible 2.5-inch SAS HDDs, SAS SSDs and SATA SSDs
  • High-bandwidth SAS expansion connectivity
  • Hot-swappable drives
  • Redundant 500W power supplies
  • 2U rackmount design
  • 5-Year Synology Hardware Warranty

Important: FX2421 is not a standalone storage server. It requires a compatible Synology FlashStation.

Short Description

The Synology FX2421 is a 24-bay 2U expansion unit designed for compatible FlashStation systems that require significantly more high-performance solid-state storage.

Its 24 hot-swappable 2.5-inch bays, high-bandwidth SAS connectivity and redundant power supplies make it suitable for demanding all-flash enterprise environments.

Why Choose This Synology

Add 24 High-Performance Drive Bays

Each FX2421 provides substantial additional capacity for supported FlashStation systems.

Built for FlashStation Performance

The high-bandwidth expansion connection is designed to keep latency low and allow expansion drives to operate much like storage installed directly in the host FlashStation.

Redundant Power and Replaceable Fans

Redundant PSUs and modular system fans help protect service continuity and simplify hardware maintenance.

Hot-Swappable Storage

Drives can be installed or replaced without shutting down the expansion system.

Centralised DSM Management

The expansion unit is managed directly from the connected FlashStation.

Best For

  • Enterprise all-flash storage
  • Synology FS6400
  • Synology FS3600
  • Synology FS3400
  • Virtualisation
  • Database storage
  • High-I/O workloads
  • Enterprise SSD expansion

Compatible Synology Systems

The FX2421 is officially compatible with:

  • FS6400
  • FS3600
  • FS3400

Important: Synology states that the FX2421 can only be used alongside identical FX2421 expansion units.

DSM 6.2.3-25426-2 or later is required.

Compatible Storage

The FX2421 supports compatible:

  • 2.5-inch SAS HDD
  • 2.5-inch SAS SSD
  • 2.5-inch SATA SSD

Synology currently lists its SAT5200 Enterprise Series 2.5-inch SATA SSD as an official optional storage family for the FX2421.

Always confirm the exact drive model against Synology's current FX2421 Compatibility List.

Compatible Upgrades & Accessories

Rack Installation

  • RKS-02 Sliding Rail Kit

Specifications

FIELD DETAILS
Product Code FX2421
Product Type FlashStation Expansion Unit
Drive Bays 24
Drive Size 2.5-inch
Drive Support SAS HDD / SAS SSD / SATA SSD
Hot-Swappable Drives Yes
RAID Management Through Synology DSM
SAS IN Port 1
SAS OUT Port 1
Form Factor 2U Rackmount
Dimensions 88 × 430.5 × 692mm
Dimensions with Server Ears 88 × 482 × 724mm
Weight 14.5kg
Power Supply 500W
Redundant Power Yes
Rail Support RKS-02
Warranty 5 Years

What’s in the Box

  • Synology FX2421 Main Unit × 1
  • Accessory Pack × 1
  • AC Power Cord × 2
  • Mini-SAS HD Expansion Cable × 1
  • Quick Installation Guide × 1

Warranty

5-Year Synology Limited Hardware Warranty

Sustainability

  • RoHS Compliant

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