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Synology FS3400 Expansion Unit
On-the-Fly Storage Capacity Expansion for Synology FlashStation

Synology Products
Synology Expansion Unit
Synology FX2421 24 Bay Expansion Unit
#FX2421
Our Price: $2,999.99

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Overview:

Synology FX2421 expansion units for Synology FlashStation1 make it easy to upgrade your allflash storage space with Synology enterprise SSD. Each 2U rackmount unit lets you add 24 additional 2.5” drive bays on the fly using an expansion cable. Synology FX2421 is the first 24 bay expansion unit to support Synology’s SAT5200 SATA SSD, allowing you to create a highly reliable and integrated storage setup, and receive long-term Synology updates and support. Synology FX2421 is backed by Synology’s 5-year limited warranty.

  • Seamless Storage Expansion
    24 additional drive bays available for online volume expansion on the fly for your Synology FlashStation
  • Best Fit With Enterprise-Grade Synology SSD
    Use with Synology SAT5200 SATA SSD for high performance, endurance, and verified compatibility
  • High-Reliability Design
    Modularized components including redundant power supplies and system fans ensure maximum uptime
  • Easy Hardware Setup
    Plug-and-play design and fast rack fixing lock support make upgrading storage space easy
  • Extended After-Sales Support
    Backed by Synology’s 5-year limited warranty

High-Density Unit for Easy Expansion and Backup

It is easy to expand your Synology FlashStation1 with Expansion Unit FX2421 for 24 additional 2.5” drive bays whenever needed. Without additional software configuration, FX2421 is immediately ready for use when connected to any Synology FlashStation. FX2421 expansion units can also be used as a dedicated and rapidly accessible local backup destination.

Expand FlashStation with Synology SAT5200 SSD

Synology SAT5200 SATA SSD, developed in tandem with FX2421, provides proven interoperability and high reliability through rigorous validation and compatibility testing with Synology Expansion Units. Synology’s SAT5200 solid state drive delivers up to 67,000 4K random write IOPS and enterprise-grade endurance at 1.3 DWPD. Combine SAT5200 drives with Synology FlashStation and FX2421 for a highly reliable and integrated storage setup, and receive long-term Synology updates and support.

High-Performance Data Transmission

The high-speed expansion cable provided with FX2421 enables high bandwidth connectivity for maximum data throughput between your Synology FlashStation and Expansion Unit. Drives in FX2421 operate with minimum data latency, as if installed directly on your Synology FlashStation, allowing you to take advantage of high SSD I/O performance.

High-Reliability Design, Easy Hardware Setup

The FX2421 is a highly reliable and thoroughly tested expansion unit that comes with hot-swappable drive trays and modularized components. Redundant power supplies and system fans can be replaced with ease to ensure maximum service uptime. The optional RKS1317 sliding rail kit provides fast rack fixing lock support for quick and secure rack cabinet installation.

Features:


24-bay 2.5" expansion unit for Synology FlashStation

Expand your Synology FlashStation1 with Expansion Unit FX2421 for 24 additional 2.5” drive bays whenever needed. Without additional software configuration, FX2421 is immediately ready for use when connected to Synology FlashStation. FX2421 expansion units can also be used as a dedicated and rapidly accessible local backup destination.


Expand FlashStation with Synology SAT5200 SSD

Synology enterprise-grade SAT5200 SATA SSD, developed in tandem with FX2421, provides proven interoperability and high reliability through rigorous validation and compatibility testing with Synology expansion units. Combine SAT5200 drives with Synology FlashStation and FX2421 for a highly reliable and integrated storage setup, and receive long-term Synology updates and support.


High-performance data transmission

The high-speed expansion cable provided with FX2421 enables high bandwidth connectivity for maximum data throughput between your Synology FlashStation and Expansion Unit. Drives in FX2421 operate with minimum data latency, as if installed directly on your Synology FlashStation, allowing you to take advantage of high SSD I/O performance.


High-reliability design, easy hardware setup

The FX2421 is a highly reliable and thoroughly tested expansion unit that comes with hot-swappable drive trays and modularized components. Redundant power supplies and system fans can be replaced with ease to ensure maximum service uptime. The optional RKS1317 sliding rail kit provides fast rack fixing lock support for quick and secure rack cabinet installation.


5-year warranty

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.

Synology Replacement Service (SRS)

SRS provides free advance replacement units as early as the next business day in selected regions, maximizing the service uptime for your mission-critical storage and ensuring your business continuity.


Specifications:

  1. Power Button & Indicator
  2. Beep off button
  3. Drive Trays
  4. Drive Status Indicator
  5. Power port
  6. PSU indicator and beep off button
  7. PSU fan
  8. Status indicator
  9. Alert indicator
  10. Expansion unit ID indicator
  11. SAS IN port and indicator
  12. SAS OUT port and indicator
FX2421 Hardware Specifications:
Hardware Specifications
Compatible drive type 24 x 2.5" SAS SSD/HDD or SATA SSD (drives not included)
Hot swappable drive Yes
External port
  • 1 x SAS IN
  • 1 x SAS OUT
Size (Height x Width x Depth)
  • 88 x 430.5 x 692 mm
  • 88 x 482 x 724 mm (with server ears)
Weight 14.5 kg
System fan 4 (80 x 80 x 32 mm)
AC input power voltage 100 V to 240 V AC
Power Frequency 50 to 60Hz, single phase
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
Maximum operating altitude 5,000 m (16,400 ft)
Certifications and Packaging
Environment safety RoHS compliant
Package content
  • 1 x FX2421 main unit
  • 1 x Quick Installation Guide
  • 1 x Accessory pack
  • 2 x AC power cords
  • 1 x Expansion cable
Optional accessories
  • 2.5" SATA SSD: SAT5200
  • Rail Kit Sliding: RKS1317
Warranty 5 Years

Documentation:

Download the Synology Expansion Unit FX2421 Datasheet  (PDF).

Pricing Notes:

Synology Products
Synology Expansion Unit
Synology FX2421 24 Bay Expansion Unit
#FX2421
Our Price: $2,999.99